Effective therapy for epilepsies

• US 5,876,750 A
• Filed: 06/09/1997
• Issued: 03/02/1999
• Est. Priority Date: 04/28/1994
• Status: Expired due to Term

• Current Assignee: ALZA Corporation (Johnson & Johnson)
• Original Assignee: ALZA Corporation (Johnson & Johnson)
• Inventors: Cruz, Evangeline, Wong, Patrick S.-L., Kuczynski, Anthony L., Jao, Frank, Sy, Eduardo C.
• Primary Examiner(s): Weddington, Kevin E.
• Application Number:
  US08/871,075
• Time in Patent Office: 631 Days
• Field of Search: 424/457, 424/473, 424/465, 514/389, 514/964
• US Class Current: 424/457
• CPC Class Codes: A61K 31/00 Medicinal preparations containing organic active ingredients
• CPC Class Codes: A61K 31/165 having aromatic rings, e.g. colchicine, atenolol, progabide
• CPC Class Codes: A61K 31/17 having the group >N—C(O)—N< or >N—C(S)—N<, e.g. urea, thiourea, carmustine isoureas, isothioureas A61K31/155; sulfonylureas A61K31/64
• CPC Class Codes: A61K 31/195 having an amino group
• CPC Class Codes: A61K 31/27 of carbamic or thiocarbamic acids, meprobamate, carbachol, neostigmine
• CPC Class Codes: A61K 31/4015 having oxo groups directly attached to the heterocyclic ring, e.g. piracetam, ethosuximide
• CPC Class Codes: A61K 31/4166 having oxo groups directly attached to the heterocyclic ring, e.g. phenytoin
• CPC Class Codes: A61K 31/421 1,3-Oxazoles, e.g. pemoline, trimethadione
• CPC Class Codes: A61K 31/426 1,3-Thiazoles
• CPC Class Codes: A61K 31/4535 containing a heterocyclic ring having sulfur as a ring hetero atom, e.g. pizotifen
• CPC Class Codes: A61K 31/495 having six-membered rings with two or more nitrogen atoms as the only ring heteroatoms, e.g. piperazine or tetrazinesA61K31/48 takes precedence ; with three nitrogen atoms A61K31/53
• CPC Class Codes: A61K 31/513 having oxo groups directly attached to the heterocyclic ring, e.g. cytosine
• CPC Class Codes: A61K 31/515 Barbituric acids; Derivatives thereof, e.g. sodium pentobarbital
• CPC Class Codes: A61K 31/53 having six-membered rings with three nitrogens as the only ring hetero atoms, e.g. chlorazanil, melamine melarsoprol A61K31/555 ; with four nitrogen atoms A61K31/495
• CPC Class Codes: A61K 31/54 having six-membered rings with at least one nitrogen and one sulfur as the ring hetero atoms, e.g. sulthiame
• CPC Class Codes: A61K 31/551 having two nitrogen atoms, e.g. dilazep
• CPC Class Codes: A61K 31/5513 1,4-Benzodiazepines, e.g. diazepam or clozapine
• CPC Class Codes: A61K 31/635 having a heterocyclic ring, e.g. sulfadiazine
• CPC Class Codes: A61K 45/06 Mixtures of active ingredients without chemical characterisation, e.g. antiphlogistics and cardiaca
• CPC Class Codes: A61K 9/0004 Osmotic delivery systems; Sustained release driven by osmosis, thermal energy or gas

Abstract

A dosage form is disclosed for delivering an antiepileptic drug, which dosage form comprises a laminated wall for maintaining the integrity of the dosage form and of the antiepileptic drug.

Claims

1. A dosage form for orally administering phenytoin to a patient in need of an antiepileptic drug, wherein the dosage form comprises;

(a) a dosage amount of phenytoin in the dosage form;

(b) a composition comprising a member selected from the group consisting of a polyalkylene and a carboxyalkylcellulose in the dosage form;

(c) an internal coat that surrounds at least the dosage amount of phenytoin for aiding in maintaining the integrity of the dosage form and for protecting the phenytoin in the dosage form;

(d) an external coat that contacts the internal coat and surrounds and defines the dosage form for use in antiepileptic therapy; and

,

(e) an exit in the dosage form for releasing the phenytoin from the dosage form to the patient in need of antiepileptic therapy.

2. The dosage form for administering the antiepileptic drug according to claim 1, wherein the phenytoin is replaced by an antiepileptic drug selected from the group consisting of sodium phenytoin, potassium, phenytoin, mephenytoin, phenobarbital, primidone, carbamazepine, ethosuximide, methsuximide, phensuximide, trimethadione, clonazepam, clorazepate, phenacemide, paramethadione, primaclone, clobazam, felbamate, flunarizine, lamotrigine, progabide, virgabatim, eterobarb, gabapentin, oxcarbazepine, ralitoline, tiagobine, sulthiame and tioridone.