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DRUG APPROVALS BY DR ANTHONY MELVIN CRASTO
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EMEDASTINE DIFUMARATE
Emedastine difumarate (Emadine) is a second generation antihistamine used in eye drops to treat allergic conjunctivitis. Its mechanism of action is a H1 receptor antagonist.
| Active Ingredient | Form | Dosage | Drug Type | Application | Product | |
|---|---|---|---|---|---|---|
| EMEDASTINE DIFUMARATE | SOLUTION/DROPS; OPHTHALMIC | 0.05% | RX | 020706 | 001 |
There are 1 patent(s) protecting ALCON’s EMADINE.
The last patent expires on 2013-12-08.
| Patent | Expiration | |
|---|---|---|
| US5441958 | Ophthalmic compositions comprising emedastine and methods for their use
Topical ophthalmic compositions comprising 1-(2-ethoxyethyl)-2-(4-methyl-1-homopiperazinyl)-benzimidazole and its ophthalmically acceptable acid addition salts have been found to be useful in treating allergic conjunctivitis and related ailments.
|
2013-12-8 |
Exclusivity is marketing rights granted by the FDA to the ALCON.
EMADINE ® (emedastine difumarate ophthalmic solution) 0.05% is a sterile ophthalmic solution containing emedastine, a relatively selective, H1-receptorantagonist for topical administration to the eyes. Emedastine difumarate is a white, crystalline, water-soluble fine powder with a molecular weight of 534.57. The chemical structure is presented below:
Structural Formula:
 |
Chemical Name:
lH-Benzimidazole, 1-(2-ethoxyethyl)-2-(hexahydro-4-methyl-1H-1,4-diazepin-1-yl), (E)-2-butenedioate (1:2)
Each mL of EMADINE contains: Active: 0.884 mg emedastine difumarate equivalent to 0.5 mg emedastine. Preservative: benzalkonium chloride0.01%. Inactives: tromethamine; sodium chloride; hydroxypropyl methylcellulose; hydrochloric acid/sodium hydroxide (adjust pH); and purified water. It has a pH of approximately 7.4 and an osmolality of approximately 300 mOsm/kg.
l-(2- ethoxyethyl)-2-(4-methyl-l-homopiperazinyl)-benzimidazole, otherwise known asemedastine, and its ophthalmically acceptable acid addition salts and methods for their use.
Allergic conjunctivitis is frequently characterized by ocular pruritus
(itching), erythema (inflammatory redness), edema and tearing. This condition is one of the most frequently treated by ophthalmologists, optometrists and allergists. To date, treatment has been primarily through the use of topically applied histamine t antagonists in combination with α-agonists. See, for example, the following articles:
1. Miller, J. and E.H. Wolf, “Antazoline phosphate and naphazoline hydrochloride, singly and in combination for the treatment of allergic conjunctivitis – a controlled, double-blind clinical trial.” Ann. Allergy, 35:81-86 (1975). 2. Vandewalker, M.L. et al., “Efficacy of Vasocon-A and its components with conjunctival provocation testing (CPT).” j± Allergy Clin. Immunol., 83:302 (1989). 3. Abelson, M.B. et al., “Effects of topically applied ocular decongestant and antihistamine.” Am. I. Ophthalmol., 90:254- 257 (1980).
Recent studies indicate that the antihistamine levocabastine exhibits clinical activity in patients with allergic conjunctivitis without the addition of a vasoconstrictor. See, Dechant, K.L. and K.L. Goa, “Levocabastine. A review of its pharmacological properties and therapeutic potential as a topical antihistamine in allergic rhinitis and conjunctivitis/’ Drugs, 41:202-224 (1991). In addition, it has recently been demonstrated that Hα antagonists are effective in relieving conjunctival injection (hyperemia) and erythema, as well as pruritus. See, Berdy, G.J. et al., “Allergic conjunctivitis: A survey of new antihistamines.” T. Ocular Pharmacol.. 7:313-324 (1991).
Although there are many different antihistamines available for systemic treatment of allergies and related ailments, many such antihistamines are not suitable for topical ophthalmic use because of limited ocular bioavailability. For example, terfenadine (Seldane®, made by Marion Merrell Dow), astemizole (Hismanal®, made by Janssen Pharmaceutica) and loratadine (Claritin®, made by Schering) all have good systemic activity; however, terfenadine has little or no local ocular activity, and astemizole and loratadine each have greatly reduced local ocular activity (as compared to its systemic activity).
With 11 treatments in Phase I trials, 8 in Phase II, and 13 in Phase III, Bayer has a strong pipeline.
By far the most interest currently, given that the latest reports came out October 21st, is riociguat (BAY 63-2521),
which has had good news from its ongoing Phase III clinical trials of the treatment for pulmonary arterial hypertension, also known as PAH. PAH is a progressive condition that overburdens the heart.
Trials indicate subjects had improved heart function and could better tolerate physical exercise. Patients on riociguat improved their walking distance by 36 meters on average, while those on placebo showed no improvement.
Professor Hossein Ardeschir Ghofrani of University Hospital Giessen, the principal investigator, was quite pleased with the results and explained the value of the measurement. “The six-minute walk distance test is a well-validated clinical measure in patients with PAH, and therefore, the results of the PATENT-1 trial are encouraging. . .These data from the PATENT study suggest that riociguat may be a potential treatment option both for patients who have never been treated for PAH as well as for those who have received prior treatment.”
Hossein A. Ghofrani
Associate Professor of Internal Medicine,
MD (University of Giessen) 1995 Research interests: pulmonary hypertension, ischaemia-reperfusion, experimental therapeutics, clinical trials
http://www.uni-giessen.de/cms/fbz/fb11/forschung/graduierte/mbml/faculty
Although Bayer put forth no sales estimate for the treatment, analysts predicted 2017 sales from riociguat of $480 million
BAYER PIPELINE AS ON OCT 25 2013
phase 1
| Project | Indication |
|---|---|
| CDK-Inhibitor (BAY 1000394) | Cancer |
| Mesothelin-ADC (BAY 94-9343) | Cancer |
| PSMA Bi TE Antibody (BAY 2010112) | Cancer |
| PI3K-Inhibitor (BAY 1082439) | Cancer |
| FGFR2 Antibody (BAY 1179470) | Cancer |
| HIF-PH (BAY 85-3934) | Anemia |
| Partial Adenosine A1 Agonist(BAY 1067197) | Heart Failure |
| Vasopressin Receptor Antagonist(BAY 86-8050) | Heart Failure |
| sGC Stimulator (BAY 1021189) | Heart Failure |
| S-PRAnt (BAY 1002670) | Symptomatic uterine fibroids |
| BAY 1026153 | Endometriosis |
phase2
| Project | Indication |
|---|---|
| PI3K-Inhibitor (BAY 80-6946) | Cancer |
| Regorafenib | Cancer |
| Refametinib (MEK-Inhibitor) | Cancer |
| Radium-223-Dichloride | Cancer |
| Sorafenib | Additional Indications |
| MR-Antagonist (BAY 94-8862) | Congestive Heart Failure (CHF) |
| MR-Antagonist (BAY 94-8862) | Diabetic Nephopathy |
| Riociguat (sGC Stimulator) | Pulmonary Hypertension |
| Neutrophil Elastase Inhibitor(BAY 85-8501) | Bronchiectasis |
phase 3
| Project | Indication |
|---|---|
| Sorafenib | Breast Cancer |
| Sorafenib | Adjuvant HCC |
| Sorafenib | Adjuvant RCC |
| Regorafenib | HCC 2nd line |
| Rivaroxaban | Major Adverse Cardiac Events |
| Rivaroxaban | CHF and CAD |
| peg rFVIII(BAY 94-9027) | Hemophilia |
| Aflibercept | Myopic choroidal neovascularization (mCNV) |
| Aflibercept | Diabetic Macular Edema (DME) |
| LCS 16 | Contraception |
| Vaginorm | Vulvovaginal atrophy (VVA) |
| Sodium Deoxycholate | Submental fat removal |
| Cipro DPI | Lung infection |
| Tedizolid | Skin and Lung Infections |
| Amikacin Inhale | Gram-negative pneumonia |
Sorafenib tosylate
https://newdrugapprovals.wordpress.com/2013/07/16/nexavar-sorafenib/
TEDIZOLID PHOSPHATE
Leverkusen, October 8, 2013 – Following the recent commercial introduction of five new drugs to address the medical needs of patients with various diseases, Bayer is now accelerating the development of further five promising drug candidates which are currently undergoing phase I and II clinical studies. The company today announced that it plans to progress these five new highly innovative drug candidates in the areas of oncology, cardiology, and women’s health into phase III clinical studies by 2015.
“Our Pharma research and development has done a tremendous job of bringing five new products to the market offering physicians and patients new treatment alternatives for serious diseases”, said Bayer CEO Dr. Marijn Dekkers. “Following our mission statement ‘Science For A Better Life’, the five chosen further drug candidates all have the potential to impact the way diseases are treated for the benefit of patients.”
Bayer CEO Dr. Marijn Dekkers
“Our research and development activities are strongly focused on areas where treatment options are not available today or where true breakthrough innovations are missing”, said Prof. Andreas Busch, member of the Bayer HealthCare Executive Committee and Head of Global Drug Discovery at Bayer HealthCare. “Our drug development pipeline holds a number of promising candidates which we want to bring to patients who need them urgently”, said Kemal Malik, member of the Bayer HealthCare Executive Committee, Chief Medical Officer and Head of Pharmaceutical Development at Bayer HealthCare. “Furthermore we are continuing to expand the range of indications for all our recently launched products Xarelto, Stivarga, Xofigo, Riociguat as well as Eylea and further refine the profile of these drugs in specific patient populations.”
Cl 223Ra Cl
Xofigo
https://newdrugapprovals.wordpress.com/2013/09/21/xofigo-injection-recommended-for-approval-in-eu/
The five mid-stage candidates have been selected for accelerated development based on positive “proof-of-concept” data from early clinical studies. Three of them are development compounds in the area of cardiology or the cardio-renal syndrome: Finerenone (BAY 94-8862) is a next generation oral, non-steroidal Mineralocorticoid Receptor antagonist which blocks the deleterious effects of aldosterone. Currently available steroidal MR antagonists have proven to be effective in reducing cardiovascular mortality in patients with heart failure but have significant side effects that limit their utilization. Finerenone is currently in clinical Phase IIb development for the treatment of worsening chronic heart failure, as well as diabetic nephropathy.
Finerenone (BAY 94-8862)
The second drug candidate in the area of cardiology is an oral soluble guanylate cyclase (sGC) stimulator (BAY 1021189). The start of a Phase IIb study in patients with worsening chronic heart failure is expected later this year.
For the cardio-renal syndrome, a Phase IIb program with the investigational new drug Molidustat (BAY 85-3934) is under initiation in patients with anemia associated with chronic kidney disease and/or end-stage renal disease. Molidustat is a novel inhibitor of hypoxia-inducible factor (HIF) prolyl hydroxylase (PH) which stimulates erythropoietin (EPO) production and the formation of red blood cells. Phase I data have shown that inhibition of HIF-PH by Molidustat results in an increase in endogenous production of EPO.
Molidustat (BAY 85-3934)
In oncology, Copanlisib (BAY 80-6946), a novel, oral phosphatidylinositol-3 kinases (PI3K) inhibitor, was selected for accelerated development. Copanlisib demonstrated a broad anti-tumor spectrum in preclinical tumor models and promising early clinical signals in a Phase I study in patients with follicular lymphoma. A Phase II study in patients with Non-Hodgkin’s lymphoma is currently ongoing.
Bayer has also made good progress in the development of new treatment options for patients with gynecological diseases: sPRM (BAY 1002670) is a novel oral progesterone receptor modulator that holds the promises of long-term treatment of patients with symptomatic uterine fibroids. Based on promising early clinical data the initiation of a Phase III study is planned for mid-2014.
Initiation of further studies with recently launched products
Bayer has successfully launched five new pharmaceutical products, namely Xarelto™, Stivarga™, Xofigo™, Eylea™, and Riociguat, which has very recently been approved in Canada under the trade name Adempas™.
Regorafenib, stivarga
Bayer’s Eylea (aflibercept),
https://newdrugapprovals.wordpress.com/2013/06/01/lucentis-rival-one-step-away-from-nhs-approval/
Xarelto has been approved globally for five indications across seven distinct areas of use, allowing doctors to treat patients in a greater variety of venous and arterial thromboembolic conditions than any other novel oral anticoagulant. The company continues to study the use of Xarelto for the treatment of further cardiovascular diseases. Ongoing clinical Phase III studies include COMPASS and COMMANDER-HF. The COMPASS study will assess the potential use of Xarelto in combination with aspirin, or as a single treatment to prevent major adverse cardiac events (MACE) in nearly 20,000 patients with atherosclerosis related to coronary or peripheral artery disease. The COMMANDER-HF study will evaluate the potential added benefit of Xarelto in combination with single or dual-antiplatelet therapy to help reduce the risk of death, heart attack and stroke in approximately 5,000 patients with chronic heart failure and coronary artery disease, following hospitalization for exacerbation of their heart failure.
In order to answer medically relevant questions for specific patient populations Bayer has initiated a range of additional Xarelto studies in patients with atrial fibrillation (AF) undergoing percutaneous coronary intervention with stent placement (PIONEER-AF-PCI), cardioversion (X-VERT) or an AF ablation procedure (VENTURE-AF).
As an extension to the Xarelto clinical trial programme, a number of real-world studies are designed to observe and further evaluate Xarelto in everyday clinical practice. These include the XAMOS study of more than 17,000 orthopaedic surgery patients, which confirmed the clinical value of oral, once-daily Xarelto in routine clinical practice in adults following orthopaedic surgery of the hip or knee. XANTUS is designed to collate data on real-world protection with Xarelto in over 6,000 adult patients in Europe with non-valvular AF at risk of stroke while XANAP is designed to collate data on real-world protection with Xarelto in over 5,000 adult patients in Europe and Asia with non-valvular AF at risk of stroke. XALIA will generate information from over 4,800 patients treated for an acute DVT with either Xarelto or standard of care.
In the area of oncology, Stivarga has been approved in 42 countries for use against metastatic colorectal cancer that is refractory to standard therapies, and additionally for gastrointestinal stromal tumor (GIST) in the US and Japan. Bayer is now planning to assess Stivarga in earlier stages of colorectal cancer as well as other cancer types. A Phase III trial in patients with colorectal cancer after resection of liver metastases is currently under initiation. Based on early clinical data Bayer has also initiated a Phase III study in liver cancer in patients who have progressed on sorafenib treatment.
Furthermore, the anti-cancer drug Xofigo (radium 223 dichloride) is a first-in-class alpha-pharmaceutical which is designed for use in prostate cancer patients with ‘bone metastases’ (secondary cancers in the bone) to treat the cancer in the bone and to help extend their lives. Xofigo is approved in the US for the treatment of patients with advanced castrate-resistant prostate cancer with symptomatic bone metastases. In addition, the European CHMP recently gave a positive opinion for radium 223 dichloride for the same use. The decision of the European Commission on the approval is expected in the fourth quarter of 2013.
Based on the excellent Phase III results for Xofigo in patients with castration resistant prostate cancer and symptomatic bone metastases Bayer is looking to expand the use of Xofigo to earlier stages of the disease, and plans to initiate a Phase III study in combination with the novel anti-hormonal agent abiraterone. In addition, early stage signal-generating studies in other cancer forms where bone metastases are important causes of morbidity and mortality are planned.
In the area of pulmonary hypertension Adempas (Riociguat) is the first member of a novel class of compounds – so-called ‘soluble guanylate cyclase (sGC) stimulators’ – being investigated as a new and specific approach to treating different types of pulmonary hypertension (PH). Adempas has the potential to overcome a number of limitations of currently approved treatments for pulmonary arterial hypertension (PAH) and addresses the unmet medical need in patients with chronic thromboembolic pulmonary hypertension (CTEPH). It was approved for the treatment of CTEPH in Canada in September 2013, making it the world’s first drug approved in this deadly disease.
Riociguat has already shown promise as a potential treatment option beyond these two PH indications. An early clinical study was conducted in PH-ILD (interstitial lung disease), a disease characterized by lung tissue scarring (fibrosis) or lung inflammation which can lead to pulmonary hypertension, and, based on positive data, the decision was taken to initiate Phase IIb studies in PH-IIP (idiopathic pulmonary fibrosis), a subgroup of PH-ILD. Moreover, scientific evidence was demonstrated in preclinical models that the activity may even go beyond vascular relaxation. To prove the hypothesis Bayer is initiating clinical studies in the indication of systemic sclerosis (SSc), an orphan chronic autoimmune disease of the connective tissue affecting several organs and associated with high morbidity and mortality. If successful, Riociguat has the potential to become the first approved treatment for this devastating disease.
In the area of ophthalmology, Eylea (aflibercept solution for injection) is already approved in Europe and several additional countries for the treatment of neovascular (wet) age-related macular degeneration and for macular edema following central retinal vein occlusion. In September, Bayer HealthCare and Regeneron Pharmaceuticals presented data of the two phase III clinical trials VIVID-DME and VISTA-DME of VEGF Trap-Eye for the treatment of diabetic macular edema (DME) at the annual meeting of the Retina Society in Los Angeles and at the EURetina Congress in Hamburg, Germany. Both trials achieved the primary endpoint of significantly greater improvements in best-corrected visual acuity from baseline compared to laser photocoagulation at 52 weeks. Bayer plans to submit an application for marketing approval for the treatment of DME in Europe in 2013.
About Bayer HealthCare
The Bayer Group is a global enterprise with core competencies in the fields of health care, agriculture and high-tech materials. Bayer HealthCare, a subgroup of Bayer AG with annual sales of EUR 18.6 billion (2012), is one of the world’s leading, innovative companies in the healthcare and medical products industry and is based in Leverkusen, Germany. The company combines the global activities of the Animal Health, Consumer Care, Medical Care and Pharmaceuticals divisions. Bayer HealthCare’s aim is to discover, develop, manufacture and market products that will improve human and animal health worldwide. Bayer HealthCare has a global workforce of 54,900 employees (Dec 31, 2012) and is represented in more than 100 countries. More information at www.healthcare.bayer.com.
ALCAFTADINE
Alcaftadine is used to prevent eye irritation brought on by allergic conjunctivitis. It is a H1histamine receptor antagonist.
It was approved by the U.S. Food and Drug Administration in 2010 under the trade name Lastacaft.
| Active Ingredient | Form | Dosage | Drug Type | Application | Product | |
|---|---|---|---|---|---|---|
| ALCAFTADINE | SOLUTION/DROPS; OPHTHALMIC | 0.25% | RX | 022134 | 001 |
There are 1 patent(s) protecting ALLERGAN’s LASTACAFT.
The last patent expires on 2013-11-21.
| Patent | Expiration | |
|---|---|---|
| US5468743 | Imidazo[2,1-b]benzazepine derivatives, compositions and method of use
The present invention is concerned with novel imidazo[2, 1-b][3]benzazepines of formula ##STR1## the pharmaceutically acceptable addition salts and stereochemically isomeric forms thereof, wherein each of the dotted lines independently represents an optional bond; R.sup.1 represents hydrogen, halo, C.sub.1-4 alkyl or C.sub.1-4 alkyloxy; R.sup.2 represents hydrogen, halo, C.sub.1-4 alkyl or C.sub.1-4 alkyloxy; R.sup.3 represents hydrogen, C.sub.1-4 alkyl, ethenyl substituted with hydroxycarbonyl or C.sub.1-4 alkyloxycarbonyl, C.sub.1-4 alkyl substituted with hydroxycarbonyl or C.sub.1-4 alkyloxycarbonyl, hydroxyC.sub.1-4 alkyl, formyl or hydroxycarbonyl; R.sup.4 represents hydrogen, C.sub.1-4 alkyl, hydroxyC.sub.1-4 alkyl, phenyl or halo; R.sup.5 represents hydrogen, C.sub.1-4 alkyl or halo; L represents hydrogen; C.sub.1-6 alkyl; C.sub.1-6 alkyl substituted with one substituent selected from the group consisting of hydroxy, halo, C.sub.1-4 alkyloxy, hydroxycarbonyl, C.sub.1-4 alkyloxycarbonyl, C.sub.1-4 alkyloxycarbonyl-C.sub.1-4 alkyloxy, hydroxycarbonylC.sub.1-4 alkyloxy, C.sub.1-4 alkyloxycarbonylamino, C.sub.1-4 alkylaminocarbonyl, C.sub.1-4 alkylaminocarbonylamino, C.sub.1-4 alkylaminothiocarbonylamino, aryl, aryloxy and arylcarbonyl; C.sub.1-6 alkyl substituted with both hydroxy and aryloxy; C.sub.3-6 alkenyl; C.sub.3-6 alkenyl substituted with aryl; or, L represents a radical of formula –Alk–Y–Het.sup.1 (a-1),–Alk–NH–CO–Het.sup.2 (a-2)or –Alk–Het.sup.3 (a-3); provided that 6,11-dihydro-11-(4-piperidinylidene)-5H-imidazo[2,1-b][3]benzazepine is ecxluded, which are useful antiallergic compounds.Compositions comprising said compounds, methods of using and processes for preparing the same.
|
2013-11-21 |
Exclusivity is marketing rights granted by the FDA to the ALLERGAN.
Exclusivity ends on 2015-07-28.
| Date | Supplement No. | Action | Documents |
|---|---|---|---|
| 2010-07-28 | 000 | Approval |
Possible therapeutic applications for Rooibos in the management of stress-related and metabolic diseases
http://www.chemistryviews.org/details/news/5309541/Health_Benefits_of_Rooibos_Tea.html
Glycosylated analogues of pramlintide were synthesized by a combination of solid-phase peptide synthesis and enzymatic glycosylation
http://www.chemistryviews.org/details/ezine/5275441/Medicine_Can_be_Sweet.html
AS SODIUM SALT
Bottle of rabeprazole 20 mg tablets
| Active Ingredient | Form | Dosage | Drug Type | Application | Product | |
|---|---|---|---|---|---|---|
| RABEPRAZOLE SODIUM | TABLET, DELAYED RELEASE; ORAL | 10MG **Federal Register determination that product was not discontinued or withdrawn for safety or efficacy reasons** | DISCN | 020973 | 001 | |
| RABEPRAZOLE SODIUM | TABLET, DELAYED RELEASE; ORAL | 20MG | RX | 020973 | 002 |
| Patent | Expiration | |
|---|---|---|
| US 5045552*PED | 2013-11-8 | |
| US 5045552 | Pyridine derivatives having anti-ulcerative activity
Pyridine derivatives useful for preventing or treating peptic ulcers, pharmaceutical preparations and methods of treating peptic ulcers are described.
|
2013-5-8(expired) |
Exclusivity is marketing rights granted by the FDA to the EISAI INC.
Pariprazole sodium;Rabeprazole sodium;LY-307640;E-3810;Aciphex;Pariet
Rabeprazole /ˌræ.ˈbɛp.ræ.zɔːl/ is an antiulcer drug in the class of proton pump inhibitors. It was developed by Eisai Co. and is marketed by Janssen-Cilag as the sodium salt under the brand names AcipHex (/ˈæsɨfɛks/, referring to pH) in the US, Pariet in Europe, Brazil, Canada, Japan, Russia and Australia, Acigard, Cyra, Rabium, Esoon,Orporo, Parit, Rabemac, Rabiloz, Razo, Rabifast, Rablet and Rabsiv in India, and Zechin in Pakistan.
Rabeprazole, 2-[[[4-(3-Methoxypropoxy)-3-methyl-2-pyridinyl]methyl]sulfinyl]-1H-benzimidazole has the following structural formula
Rabeprazole belongs to a class of antisecretory compounds (substituted benzimidazole proton-pump inhibitors) that do not exhibit anticholinergic or histamine H2-receptor antagonist properties, but suppress gastric acid secretion by inhibiting the gastric H+, K+ATPase at the secretory surface of the gastric parietal cell. Because this enzyme is regarded as the acid (proton) pump within the parietal cell, rabeprazole has been characterized as a gastric proton-pump inhibitor. Rabeprazole blocks the final step of gastric acid secretion. So that it can effectively inhibit the secretion of an acid and is therefore effective in the therapy or prevention of human and animal peptic ulcer.
The U.S. Pat. No. 5,045,552 discloses the Rabeprazole and many other substituted benzimidazole-type compounds having anti-ulcer activity. This patent further discloses the process for preparation of Rabeprazole by oxidation of Rabeprazole sulfide using 85% m-chloroperbenzoic acid in a mixture of dichloromethane and diethyl ether followed by work up to get product as oil. The obtained oil is crystallized from a mixture of dichloromethane/ether. Optionally the oily crude is dissolved in aqueous solution of sodium hydroxide. The obtained solution is subjected to azeotropic distillation with ethanol to remove water and adding ether to get crystalline Rabeprazole base.
According to the prior art, Rabeprazole base is crystallized using dichloromethane/ether to obtain crystalline off white product. The HPLC purity is less than or equal to 99% and the isolation procedure involves azeotropic distillation of water, during which the product is exposed to high temperature and leads to certain impurities. Repeated crystallization is needed to remove impurities to get desired quality. Using large volumes of chlorinated solvents in the plant leads to environmental hazardous.
Japanese patent application JP2001039975 teaches that the product obtained by example 33 of U.S. Pat. No. 5,045,552 with a melting range of 140-141° C. corresponds to amorphous rabeprazole sodium
The U.S. Pat. No. 6,919,459 patent also discloses the process for the preparation of Rabeprazole by oxidation of Rabeprazole sulfide using m-Chloroperbenzoic acid (m-CPBA) in a suitable solvent. The reaction mass is subjected to repeated washings at different pH levels and isolate the product from aqueous layer.
Rabeprazole is not stable at acidic conditions and decomposes to form unknown impurities. To remove these impurities repeated crystallizations are required to get desire quality of the final product.
The WO2006/117802 PCT application discloses the process for the preparation of Rabeprazole sodium by oxidation of Rabeprazole sulfide with sodium hypo halite solution in water or a mixture of water and water miscible solvent medium using alkali metal hydroxide and catalyst. The reaction mass is saturated by inorganic saturating agents and the Rabeprazole sodium salt is extracted with water immiscible organic solvent. Organic solvent is distilled and the residue is dissolved in second organic solvent to get clear solution, which is precipitated by adding antisolvent.
The WO2006/120701 PCT application discloses process for manufacture of amorphous Rabeprazole sodium by the reaction of Rabeprazole base with aqueous sodium hydroxide. Ethanol is added to the obtained solution. Solvents are distilled from the solution to get thick mass. Organic solvent is added to the obtained residue to get clear solution, to which antisolvent is added to get amorphous Rabeprazole sodium.
The prior art methods cited above have many disadvantages, these methods involve more number of organic solvents and lack successive extractions and washings of the layers during work up procedure. It leads to many impurities that ultimately affect on purity and yield loss of final product.
The U.S. Pat. No. 6,180,652 and WO 2003101452 PCT application discloses the process for the preparation of amorphous rabeprazole sodium, which is obtained by lyophilization of an aqueous solution of rabeprazole sodium acetone complex and an aqueous NaOH solution of Rabeprazole respectively.
Lyophilization technique is not suitable for production at industrial scale and it needs more time cycle and involves the cost.
We observed that rabeprazole is rapidly degraded in chlorinated solvent like dichloromethane to form unknown impurities, due to impurities while distillation gummy material is formed. It leads to yellowish color in final product, finally it leads to yield loss in final product.
According to prior art methods,
US 6,313,303 discloses the preparation of sulfoxides by oxidizing thio ether with a peroxoborate salt in the presence of an acid anhydride or a metal catalyst; and the preparation of sulfoxides by oxidizing thio ether with an N- halosuccinimide, l,3-dihalo-5,5-dimethyl-hydantoin or dichloroisocyanuric acid salt in the presence of a base.
IN 192030 discloses the purification process of Rabeprazole, in which sulfone enriched Rabeprazole is treated with an amino alcohol e.g. ethanolamine in the presence of an organic solvent, further the reaction mixture washed with water to remove the sulfone impurities. US 7,439,367 (IN218648, 058/MUM/2003, 193/MUM/2003) discloses the preparation of Rabeprazole by oxidizing its corresponding sulfide compound, where aqueous hypohalite solution is used as an oxidizing agent. The said oxidation is carried out at a controlled temperature and pH. During said oxidation the pH of the reaction mixture is maintained in the range of 9 to 12. This process utilizes catalyst such as pyridine, di-isopropyl ethyl amine and N,N-dimethyl amino pyridine.
US 7,060,837 discloses the purification of lansoprazole using ammonia, ammonium hydroxide, diethylamine, triethylamine and methylamine in the presence of solvent. The said patent utilizes acid for the isolation of lanzoprazole in pure form.
US 2008/0161579 (IN190/MUM/2005) discloses a process for the preparation of Rabeprazole sodium comprising oxidation of Rabeprazole sulfide with sodium hypohalite in water or a mixture of water and water miscible solvent using alkali metal hydroxide and catalyst. It also discloses a process for the preparation of Rabeprazole sulfide.
WO 2008/045777 (1856/CHE/2006) discloses the preparation of
Rabeprazole by oxidizing the corresponding sulfide compound using about 0.8 to 1.25 equivalents of an oxidizing agent in the presence of less than or about 2.25 equivalents of a base where aqueous sodium hypohalite used as an oxidizing agent.
WO 2006/024890 discloses a process for the preparation of Rabeprazole in which the Rabeprazole obtained was treated with the triethylamine in hexane. The use of n-hexane in the final stage is not suitable for manufacturing point of view as it is difficult to remove residual hexane solvent. There are several disadvantages associated with such known processes; all the methods reported in these prior arts leads to the formation of many impurities which ultimately affects the purity of the final product.
US 5,045,552 patent discloses the preparation of Rabeprazole by oxidizing the Rabeprazole sulfide using m-chloroperbenzoic acid as shown in scheme-I. The crude Rabeprazole was dissolved in sodium hydroxide and the resulting solution was azeotropically distilled together with ethanol thrice to remove the water. Finally ether was added to get the crystals of Rabeprazole sodium
WO 03/101452 discloses a method for the preparation of Rabeprazole sodium comprising dissolving Rabeprazole base in aqueous sodium hydroxide and then subjecting to lyophilization.
Souda, S.; Ueda, N.; Miyazawa, S.; Tagami, K.; Nomoto, S.; Okita, M.; Shimomura, N.; Kaneko, T.; Fujimoto, M.; Murakami, M.; Oketani, K.; Fujisaki, H.; Shibata, H.; Wakabayashi, T. (Eisai Co., Ltd.); Pyridine derivs., pharmaceutical compsns. comprising the same, the use of the same for the manufacture of medicaments having therapeutic or preventative value, and a process for preparing the same. AU 8781138; EP 0268956; EP 0475456; EP 0654471; EP 0786461; JP 1989006270; JP 1993247035; JP 1995291967; US 5045552; US 5998445 .
Castaner, J.; Prous, J.; E-3810. Drugs Fut 1991, 16, 1, 19.
Sohda, S.; Tagami, K.; Chiku, S.; Synthesis of 14C-labelled sodium pariprazole (E3810). J Label Compd Radiopharm 1993, 33, 9, 849.
Rabeprazole as “CYRA” (Systopic Labs Pvt Ltd), “Elpizole” (Orchid Chemicals & Pharmaceuticals), Elpizole-20 (Orchid Chemicals & Pharmaceuticals), Rablet (Lupin), Acigard (3D), AcipHex, Rabeloc, Pariet, Rabider (Duta Formulations) Rabsiv 20 (Saharsh Biologicals) is supplied in:
HPLC METHOD
Rabeprazole with more impurities, particularly at 2.12 RRT (393 mass), 3.51 RRT (491 mass), 4.47 RRT (457 mass), 4.85 RRT (684 mass) and 4.54 RRT (893 mass). The mass (molecular or formula weight) number of the impurities were identified using LCMS. Particularly, the obtained product contains unknown impurities of higher molecular weight in the range of 0.1-1.0 % at relative retention time (RRT) of 2.12, 3.51, 4.47, 4.85, and 4.54 RRT as measured by high performance liquid chromatography (HPLC) method provided below.
The purity of the product obtained is determined by high performance liquid chromatography method under the conditions mentioned below.
Column: Prontosil Kromabond 100-5-C18 (250 x 4.6 mm), 5μ,
Mobile phase A: 1.36g KH2PO4 to 1 litre water, 0.5ml OfEt3N, Mobile phase B: Methanol: ACN (95:5),
Diluent: Mobile phase A and ACN (70:30),
Flow Rate: 1.0 mL/min,
Detection: UV at 280 nm,
Injection Volume: 20 μL, Run Time: 60 min.
Column oven temperature: 3O0C. Surprisingly the applicant identified a method in which, crude Rabeprazole was treated with diethylamine and optionally addition of TBAB (tetrabutylammmonium bromide) as catalyst, where the impurity level reduced. Though the reported amines like triethyl amine, ethanolamine, and ammonia are effectively used to minimize sulfone impurity, those are failed or unsatisfactory to remove the impurities at 2.12 RRT, 3.51 RRT, 4.47 RRT, 4.85 RRT and 4.54 RRT.
SPECTRAL DATA
EP 1869015 B1 FOR RABEPRAZOLE SODIUM
IR Spectra (KBr, cm-1): 3382, 2927, 1583, 1462, 1384, 1298, 1269, 1190, 1157, 1093, 1018, 745.
H NMR Spectra [200 M Hz, CD3OD] δ (ppm): 8.23 – 8.25 (1H, d, ArH); 7.57 – 7.62 (2H, m, ArH); 7.0 – 7.09 (2H, m, ArH); 6.87 – 6.90 (1H, d, ArH); 4.57 – 4.63 (2H, d, O=S-CH2-Ar); 4.0 – 4.1 (2H, t, -O-CH2-CH2-); 3.49 – 3.55 (2H, t, -CH2-O-CH3); 3.31 (3H, s, -OCH3); 2.1 (3H, s, Ar-CH3); 1.96 – 2.0 (2H, t, -CH2-CH2-CH2-).
MP
As per the process described and exemplified in the U. S. Patent No.
5,045,552, rabeprazole sodium is prepared by oxidizing 2-[[4-(3- methoxyporpoxy)-3-methylpyridine-2-yl]rnethylthio]-1 H-benzimidazole with m- chloroperbenzoic acid to afford the rabeprazole base which is further converted to its sodium salt by using 0.1 N aqueous solution of sodium hydroxide, followed by addition of ethanol. The water is removed by azeotropic distillation and the product is precipitated by using ether as solvent such as diethyl ether, tert-butyl methyl ether. The melting point of the disclosed rabeprazole sodium salt is 140- 1410C. The isolation process described in the U. S. Patent No. 5,045,552 has numerous disadvantages such as large volume of solvents is required for azeotropic removal of water during which the product is exposed to high temperature and leads to certain impurities. Based on these drawbacks the isolation process finds to be unsuitable for preparation of amorphous rabeprazole sodium at commercial scale operations.
Japanese patent application JP 2001039975 indicates that the product obtained by example 33 of the U. S. Patent No. 5,045,552 with a melting point of
140-1410C corresponds to amorphous rabeprazole sodium. In this application, the X-ray powder diffraction pattern of the amorphous rabeprazole sodium is shown.
The PCT patent publication No. WO 03/101452 discloses a method for the preparation of rabeprazole sodium comprising dissolving rabeprazole base in aqueous sodium hydroxide and then subjecting to lyophilization. U.S. Patent No. 6,180,652 B1 (the ‘652 patent) describes acetone complex of rabeprazole sodium, process for its production and characterizes it by powder X-ray diffraction, infra-red spectroscopy and 1H-NMR spectroscopy. The ‘652 patent further reports a process for preparation of amorphous rabeprazole sodium by lyophilizing (freeze-drying) an aqueous solution of rabeprazole sodium acetone complex.
However, lyophilization is a technique, which is not suitable for production at industrial scale because this process presents serious limitations on cost, time, equipment capability and environmental protection.
According to PCT patent publication No. WO 2004/085424A1 , amorphous rabeprazole sodium is obtained by heating the rabeprazole sodium acetone complex at elevated temperature, preferably between 100 and 1100C. It is well known that exposing rabeprazole-type compounds to high temperatures increases the risk of decomposition to form impurities and as such, heat treatment of rabeprazole sodium acetone complex into amorphous rabeprazole sodium is not adequate for the production of a rabeprazole which is suitable for pharmaceutical use.
PCT patent publication No. WO 2007/023393 A2 reports a process for preparation of amorphous rabeprazole sodium, the said process comprises: i) contacting rabeprazole sodium acetone complex with a first solvent system which includes a hydrocarbon solvent or an ether solvent or an alcohol solvent or mixtures thereof; ii) filtering the solid from the solvent system used in step i) or distilling the solvent system used in step i) under reduced or atmospheric pressure, to thereby obtain a residue; iii) contacting the wet solid or the residue of step ii) with a second solvent system which includes a hydrocarbon solvent or an ether solvent; and iv) filtering to obtain a wet solid from the solvent system used in step iii) to obtain a wet solid.
The methods for preparation of amorphous rabeprazole sodium as described in the patents U.S. Patent No. 6,180,652 B1 , PCT patent publication No. WO 2004/085424A1 and PCT patent publication No. WO 2007/023393 A2 involves lengthy process i.e., proceeds via rabeprazole sodium acetone complex intermediate and also the yields obtained in these processes are very low.
U.S. Patent Application No. US2004/0180935A1 teaches a process for production of amorphous rabeprazole sodium by dissolving rabeprazole acid in a mixture of sodium hydroxide and methanol at 25-350C, removing the solvent by evaporation and precipitating the product by adding petroleum ether.
PCT patent publication No. WO 2006/120701 A1 teaches a process for manufacture of amorphous rabeprazole sodium with mean particle diameter between 10 to 55 μm, the said process comprises, addition of rabeprazole to aqueous sodium hydroxide; addition of ethyl alcohol to the solution; distillation of solvents from the solution thus obtained till thick mass is obtained; addition of an organic solvent selected from ethyl acetate, dichloromethane, chloroform, butyl acetate, ethanol, isopropyl alcohol, methanol, tetrahydrofuran, to the residue to obtain a clear solution; addition of this clear solution to an anti-solvent includes diisopropyl ether, diethyl ether, methyl tert-butyl ether, under agitation and isolation of the product.
Since a solvent may play an important role in increasing the yield rate or in determination of physical properties of drug substance such as crystal form, purity, solubility, etc., even if such a solvent is known to be toxic, there may be many cases that the use thereof in the preparation of drug substance cannot be avoided in terms of risk benefits. In such cases, this guideline (ICH guidelines Q3C(R3)) decrees that a concentration of a residual solvent in drug substance should be not more than a specified value, which is toxicologically acceptable. The methods for preparation of amorphous rabeprazole sodium as described in the patents, U.S. Patent Application No. US2004/0180935A1 and PCT patent publication No. WO 2006/120701 A1 suffers with residual solvent problem and thereby commercially not viable. These methods utilize the solvents like diisopropyl ether and petroleum ether as precipitating solvents. These solvents are difficult to remove completely by practical manufacturing techniques. According to the ICH guidelines Q3C(R3), there is no adequate toxicological data for the solvents like diisopropyl ether and petroleum ether on which to base a PDE was found. However, a need still remains for an improved and commercially viable process of preparing pure amorphous rabeprazole sodium that would solve the aforesaid problems associated with processes described in the prior art, which will be suitable for largr-scale preparation, in terms of simplicity, chemical yield and purity of the product, and which would carry out with comparatively smaller volume of solvent
CLONIDINE
C9H9Cl2N3•HCl Mol. Wt. 266.56
Clonidine hydrochloride is an imidazoline derivative and exists as a mesomeric compound. The chemical name is 2-(2,6-dichlorophenylamino)-2-imidazoline hydrochloride. The following is the structural formula:
Clonidine hydrochloride is an odorless, bitter, white, crystalline substance soluble in water and alcohol.
SHIONOGI INC
| Active Ingredient | Form | Dosage | Drug Type | Application | Product | |
|---|---|---|---|---|---|---|
| CLONIDINE HYDROCHLORIDE | TABLET, EXTENDED RELEASE; ORAL | 0.1MG | RX | 022331 | 003 | |
| CLONIDINE HYDROCHLORIDE | TABLET, EXTENDED RELEASE; ORAL | 0.2MG | RX | 022331 | 004 |
There are 1 patent(s) protecting SHIONOGI INC’s KAPVAY.
The last patent expires on 2013-10-13.
| Patent | Expiration | |
|---|---|---|
| US5869100 | Extended release clonidine formulation (tablet)
A method of providing a patient needing clonidine with an extended dosage of clonidine over a prolonged period of time. Such method involves administering to the patient an oral dosage unit comprising a homogenous mixture of a therapeutically effective amount of clonidine, about 30 to about 70 percent by weight of one or more cellulose ethers such as hydroxypropyl methylcellulose, and about 30 to about 70 percent by weight of an inert substance such as cornstarch. The oral dosage unit may be contained in a gelatin capsule or in the form of a tablet.
|
2013-10-13(expired) |
Exclusivity is marketing rights granted by the FDA to the SHIONOGI INC.
Exclusivity ends on 2013-09-28.
loteprednol etabonate
82034-46-6 cas
Drug Patent Expiry for the week of October 20, 2013
Tradename….LOTEMAX
Applicant………Pharmos
SUSPENSION/DROPS; OPHTHALMIC, o.5%
Generic Name………loteprednol etabonate
Patent No.US 5,540,930
http://www.google.co.in/patents/US5540930
The invention provides novel compositions of matter containing water-insoluble steroid drugs suitable for therapeutic use. The invention provides stable aqueous suspensions of water-insoluble steroid drugs of particle sizes of ≦15 μm which remain in such a state so as to allow for immediate suspension, when desired, even after extended periods of settling.
| Date | Supplement No. | Action | Documents |
|---|---|---|---|
| 1998-03-09 | 000 | Approval |
| Publication number | US5540930 A |
| Publication type | Grant |
| Application number | US 08/142,743 |
| Publication date | 30 Jul 1996 |
| Filing date | 25 Oct 1993 |
| Priority date | 25 Oct 1993 |
| Fee status | Paid |
| Also published as | CA2174550A1, CA2174550C, DE69430635D1, DE69430635T2, EP0730443A1, EP0730443A4, EP0730443B1, US5747061, WO1995011669A1, Less «8 More » |
| Publication number | 08142743, 142743, US 5540930 A, US 5540930A, US-A-5540930, US5540930 A, US5540930A |
| Inventors | Doron I. Friedman, Yaacov J. Guy |
| Original Assignee | Pharmos Corporation |
| Company | |||
|---|---|---|---|
| LOTEMAX NDA (020583) | BAUSCH AND LOMB | LOTEPREDNOL ETABONATE | |
| ALREX NDA (020803) | BAUSCH AND LOMB | LOTEPREDNOL ETABONATE | |
| LOTEMAX NDA (020841) | PHARMOS | LOTEPREDNOL ETABONATE…expired | |
| ZYLET NDA (050804) | BAUSCH AND LOMB | LOTEPREDNOL ETABONATE; TOBRAMYCIN | |
| LOTEMAX NDA (200738) | BAUSCH AND LOMB | LOTEPREDNOL ETABONATE | |
| LOTEMAX NDA (202872) | BAUSCH AND LOMB | LOTEPREDNOL ETABONATE |
Loteprednol (as the ester loteprednol etabonate) is a corticosteroid used in optometry and ophthalmology. Marketed by Bausch and Lomb as Lotemax in the U.S., ocular applications for this drug include the treatment of inflammation of the eye due to allergies (according to the prescription information sheet), as well as chronic forms of keratitis (e.g.: adenoviral and Thygeson’s keratitis), vernal keratoconjunctivitis, pingueculitis, and episcleritis. The drug has little or no effect on intraocular pressure.
Druzgala, P.; Hochhaus, G.; Bodor, N.; J. Steroid Biochem. Mol. Biol. 1991, 38, 149.
http://dx.doi.org/10.1016/0960-0760(91)90120-T
New Drug Approvals 