Sustained-release product comprising a combination of a non-opioid amine and a non-steroidal anti-inflammatory drug

1. A sustained-release oral pharmaceutical composition comprising within a single dosage form:

a hydrophilic matrix;

a therapeutically effective amount of a non-opioid amine-containing compound; and

a salt of a non-steroidal anti-inflammatory drug (NSAID);

wherein the non-opioid amine-containing compound and the salt of an NSAID are within the hydrophilic matrix; and

wherein the composition exhibits a release profile with respect to the non-opioid amine-containing compound, wherein the release profile comprises a substantial portion that is representative of zero-order release kinetics under in vitro conditions as a result of dissolution of the hydrophilic matrix.

2. A sustained-release oral pharmaceutical composition comprising within a single dosage form:

a hydrophilic matrix;

a therapeutically effective amount of a non-opioid amine-containing compound;

a salt of a non-steroidal anti-inflammatory drug (NSAID); and

a pharmaceutically acceptable anionic surfactant;

wherein the non-opioid amine-containing compound, the salt of an NSAID, and the anionic surfactant are within the hydrophilic matrix; and

wherein the composition exhibits a release profile with respect to the non-opioid amine-containing compound, wherein the release profile comprises a substantial portion that is representative of zero-order release kinetics under in vitro conditions as a result of dissolution of the hydrophilic matrix.

3. The composition of claim 1 wherein the non-opioid amine-containing compound comprises an amine group, and wherein the amine group comprises a secondary amine, a tertiary amine, a primary amine, or combination thereof.

4. The composition of claim 1 wherein the non-opioid amine-containing compound comprises a tertiary amine.

5. The composition of claim 2 wherein the non-opioid amine-containing compound is selected from the group consisting of dextromethorphan, cyclobenzaprine, benztropine, baclofen, arbaclofen, ritodrine, tizanidine, flurazepam, chlorpheniramine, doxylamine, diphenhydramine, diltiazem, rimantadine, amantadine, memantine, and combinations thereof.

6. The composition of claim 1 wherein the non-opioid amine-containing compound is a salt comprising a hydrochloride, a bitartrate, an acetate, a naphthylate, a tosylate, a mesylate, a besylate, a succinate, a palmitate, a stearate, an oleate, a pamoate, a laurate, a valerate, a hydrobromide, a sulfate, a methane sulfonate, a tartrate, a citrate, a maleate, or a combination of the foregoing.

7. The composition of claim 1 wherein the NSAID salt is selected from the group consisting of a salicylate derivative, a 2-aryl propionic acid derivative, a pyrazolidine derivative, an N-arylanthranilic acid derivative, an oxicam derivative, an arylalkanoic acid, an indole derivative, and combinations thereof.

8. The composition of claim 2 , wherein the pharmaceutically acceptable anionic surfactant is selected from the group consisting of monovalent alkyl carboxylates, acyl lactylates, alkyl ether carboxylates, N-acyl sarcosinates, polyvalent alkyl carbonates, N-acyl glutamates, fatty acid-polypeptide condensates, sulfur-containing surfactants, phosphated ethoxylated alcohols, and combinations thereof.

9. The composition of claim 1 wherein the NSAID salt is present in an amount effective to provide zero-order release kinetics under in vitro conditions.

10. The composition of claim 2 wherein the pharmaceutically acceptable anionic surfactant is present in a release-modifying amount.

11. The composition of claim 1 wherein the single dosage form is a tablet form.

12. The composition of claim 1 wherein the hydrophilic matrix comprises at least one hydrophilic polymeric compound selected from the group consisting of a gum, a cellulose ether, an acrylic resin, a polyvinyl pyrrolidone, a protein-derived compound, and combinations thereof.

13. A sustained-release oral pharmaceutical composition comprising within a single dosage form:

a hydrophilic matrix;

a therapeutically effective amount of an amine-containing compound selected from the group consisting of dextromethorphan, cyclobenzaprine, benztropine, ritodrine, memantine, amantadine, salts thereof, and combinations thereof; and

a salt of a non-steroidal anti-inflammatory drug (NSAID) selected from the group consisting of a salt of naproxen, diclofenac, ibuprofen, and combinations thereof;

wherein the amine-containing compound and the salt of an NSAID are within the hydrophilic matrix; and

wherein the composition exhibits a release profile of the amine-containing compound, wherein the release profile comprises a substantial portion that is representative of zero-order release kinetics under in vitro conditions.

14. A sustained-release oral pharmaceutical composition comprising within a single dosage form:

a hydrophilic matrix;

a therapeutically effective amount of an amine-containing compound selected from the group consisting of dextromethorphan, cyclobenzaprine, benztropine, ritodrine, memantine, amantadine, salts thereof, and combinations thereof;

a salt of a non-steroidal anti-inflammatory drug (NSAID) selected from the group consisting of a salt of naproxen, diclofenac, ibuprofen, and combinations thereof; and

a pharmaceutically acceptable anionic surfactant selected from the group consisting of sodium lauryl sulfate, docusate sodium, docusate calcium, and combinations thereof;

wherein the amine-containing compound, the salt of an NSAID, and the anionic surfactant are within the hydrophilic matrix; and

wherein the composition exhibits a release profile of the amine-containing compound, wherein the release profile comprises a substantial portion that is representative of zero-order release kinetics under in vitro conditions.

15. A method of providing a desired effect in a subject, the method comprising administering to a subject a composition of claim 1 , wherein the desired effect is pain treatment, cough suppression, muscle relaxation, treatment of migraine headaches, treatment of spasms, treatment of convulsions, antihistamine effect, anti-inflammatory effect, antihypertensive effect, antiviral effect, treatment of Parkinson's Disease, or treatment of Alzheimer's Disease.

16. The method of claim 15 wherein administering the composition comprises administering once or twice per day.

17. The method of claim 16 wherein administering the composition comprises administering once per day.