Ranbaxy Laboratories, Inc.

Himadri Sen

John Nicholas Staniforth

Girish Kumar Jain

Jitendra Krishan Somani

Indu Bhushan

Ashok Rampal

Naresh Talwar

Vishnubhotla Nagaprasad

Rajeev S Raghuvanshi

Chetan Rajsharad

Farhan Ahmed

Jagdish Arora

A pharmaceutical composition in the form of tablets or capsules provides a combination of temporal and spatial control of drug delivery to a patient for effective therapeutic results. The pharmaceutical composition comprises a drug, a gas generating component, a swelling agent, a viscolyzing agent, and optionally a gel forming polymer. The swelling agent belongs to a class of compounds known as superdisintegrants (e.g., cross-linked polyvinylpyrrolidone or sodium carboxymethylcellulose). The viscolyzing agent initially and the gel forming polymer thereafter form a hydrated gel matrix which entraps the gas, causing the tablet or capsule to be retained in the stomach or upper part of the small intestine (spatial control). At the same time, the hydrated gel matrix creates a tortuous diffusion path for the drug resulting in sustained release of the drug (temporal control). A preferred once daily ciprofloxacin formulation comprises 69.9% profloxacin base, 0.34% sodium alginate, 1.103% xanthan gum, 13.7% sodium bicarbonate, 12.1% cross-linked polyvinylpyrrolidone, and optionally other pharmaceutical xcipients, the formulation being in the form of a coated or uncoated tablet or capsule.

Orally administered drug delivery system providing temporal and spatial control

A sustained release formulation of etodolac for once daily administration is described.

Extended release formulation of etodolac

This invention relates to a process of mixing of crystalline cefuroxime axetil with amorphous cefuroxime axetil for the preparation of a bioavailable oral dosage form comprising of amorphous cefuroxime axetil containing from 7 to 25% crystalline cefuroxime axetil.

Process for the preparation of a bioavailable oral dosage form of cefuroxime axetil

This invention relates to a bioavailable oral dosage form comprising of amorphous cefuroxime axetil containing from 7 to 25% crystalline cefuroxime axetil.

Bioavailable oral dosage form of cefuroxime axetil

This invention relates to a process for the preparation of a controlled release pharmaceutical composition comprising two discrete zones wherein the first discrete zone comprises therapeutically effective amount of pseudoephedrine or its pharmaceutically acceptable salt as active ingredient and the second discrete zone comprises a therapeutically effective amount of a long-acting antihistamine selected from the group consisting of loratadine, azatidine, fexofenadine, terfenadine, cetirizine, astemizole, and levocabastine, or their pharmaceutically acceptable salt as active ingredient.

Process for the preparation of a controlled drug delivery system containing pseudoephedrine and a long acting antihistamine

A pharmaceutical composition in the form of tablets or capsules provides a combination of temporal and spatial control of drug delivery to a patient for effective therapeutic results. The pharmaceutical composition comprises a drug, a gas generating component, a swelling agent, a viscolyzing agent, and optionally a gel forming polymer. The swelling agent belongs to a class of compounds known as superdisintegrants (e.g., cross-linked polyvinylpyrrolidone or sodium carboxymethylcellulose). The viscolyzing agent initially and the gel forming polymer thereafter form a hydrated gel matrix which entraps the gas, causing the tablet or capsule to be retained in the stomach or upper part of the small intestine (spatial control). At the same time, the hydrated gel matrix creates a tortuous diffusion path for the drug, resulting in sustained release of the drug (temporal control). A preferred once daily ciprofloxacin formulation comprises 69.9% ciprofloxacin base, 0.34% sodium alginate, 1.03% xanthan gum, 13.7% sodium bicarbonate, 12.1% cross-linked polyvinylpyrrolidone, and optionally other pharmaceutical excipients, the formulation being in the form of a coated or uncoated tablet or capsule.

Orally administered controlled drug delivery system providing temporal and spatial control

A pharmaceutical composition in the form of a tablet or a capsule for the controlled release of diltiazem, comprises about 30 to about 97% by weight of a hydrophilic polymer, about 0.5 to about 30% by weight of an enteric (pH-dependent) polymer, and about 2.5 to about 60% by weight of diltiazem or a pharmaceutically acceptable salt or ester thereof. The ratio of hydrophilic polymer to enteric polymer is in the range of about 1:1 to about 15:1. Such a pharmaceutical composition releases diltiazem at a rate that allows effective plasma levels of diltiazem to be maintained over a period of twenty-four hours after administration to human adult subjects.

Controlled drug delivery system for diltiazem

A pharmaceutical composition in the form of a tablet for controlled release of an active ingredient comprises cefaclor, cephalexin, or their pharmaceutically acceptable hydrates, salts, or esters as active ingredient, and a mixture of hydrophilic polymers of different viscosity grades selected from the group consisting of at least one hydroxypropyl methylcellulose and at least one hydroxypropylcellulose. The composition optionally also contains one or more of a water soluble or water dispersible diluent. The quantities of the hydrophilic polymers and water soluble or water dispersible diluent are such that the therapeutically effective active ingredient is released at a rate suitable for twice daily administration of the pharmaceutical composition to human subjects. The tablets may also be coated with a rapidly dissolving water soluble polymeric film coat. In a preferred embodiment, the composition comprises about 50% to about 90% by weight of cefaclor, cephalexin, or their pharmaceutically acceptable hydrates, salts, or esters, and about 5% to about 35% of a mixture of hydrophilic polymers of different grades, wherein the hydrophilic polymers comprise about 0.1% to about 20% by weight of hydroxypropyl methylcellulose and about 0.1% to about 20% by weight of hydroxypropyl cellulose.

Modified release matrix formulation of cefaclor and cephalexin

An effervescent pharmaceutical composition for oral use in the treatment of a condition mediated through histamine H.sub.2 receptors contains a therapeutically effective amount of ranitidine or a physiologically acceptable salt thereof, about 25-70% by weight of disodium citrate, and about 20-50% by weight of sodium bicarbonate. Optionally, the effervescent composition may also Include about 0.5-25% by weight of an edible organic acid such as fumaric acid. Preferably, the effervescent composition is in the form of a tablet. Additional excipients for the effervescent composition include about 2-10% by weight of glycine, a flavoring agent, a sweetening agent, a binding agent, and/or a lubricant.

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Haryana, India

Himadri Sen