Treatment of abnormal increases in gastrointestinal motility with (R)-verapamil

1. A method for treating an increase in gastrointestinal motility in a subject in need of said method; comprising administering a therapeutically effective amount of enriched (R)-verapamil, or a pharmaceutically acceptable salt thereof, to said subject, wherein the (R)-verapamil is at least about 98% enriched with respect to its (S) stereoisomer.

2. The method of claim 1 , wherein the subject is suffering from irritable bowel syndrome (IBS), an infectious disease of the small or large intestine, or symptoms of any of the foregoing.

3. The method of claim 2 , wherein the subject is suffering from irritable bowel syndrome.

4. The method of claim 1 , wherein the enriched (R)-verapamil is provided in a pharmaceutical formulation.

5. The method of claim 4 , the enriched (R)-verapamil formulation is a solid dosage form.

6. The method of claim 4 , the enriched (R)-verapamil formulation is administered orally, nasally, rectally, intravaginally, parenterally, buccally, sublingually or topically.

7. The method of claim 6 , the enriched (R)-verapamil formulation is administered rectally or orally.

8. The method of claim 4 , wherein the enriched (R)-verapamil formulation is provided as a tablet, capsule, or suppository.

9. The method of claim 4 , wherein the enriched (R)-verapamil formulation comprises one or more pharmaceutically acceptable excipients.

10. The method of claim 9 , wherein the excipient is starch, sugar, cellulose, diluent, granulating agent, lubricant, binder, disintegrating agent, wetting agent, emulsifier, coloring agent, release agent, coating agent, sweetening agent, flavoring agent, perfuming agent, preservative, antioxidant, plasticizer, gelling agent, thickener, hardener, setting agent, suspending agent, surfactant, humectant, carrier, stabilizer, or a combination thereof.

11. The method of claim 1 , the enriched (R)-verapamil is administered from one to five times per day.

12. The method of claim 11 , wherein the enriched (R)-verapamil is administered one time per day.

13. The method of claim 1 , wherein the subject is a human.

14. The method of claim 7 , wherein the enriched (R)-verapamil is administered orally and the amount of enriched (R)-verapamil ranges from about 30 mg to about 600 mg per day.

15. The method of claim 14 , wherein the amount of enriched (R)-verapamil administered ranges from about 60 mg to about 480 m per day.

16. The method of claim 4 , wherein the formulation further comprises one or more additional pharmaceutically active compounds.

17. The method of claim 1 , wherein the enriched (R)-verapamil is further administered in combination with one or more additional pharmaceutically active compounds.

18. The method of claim 1 , wherein the enriched (R)-verapamil is provided in a modified-release formulation.

19. The method of claim 18 , wherein the modified-release formulation comprises one or more water-soluble polymers, water-insoluble polymers, or a combination thereof.

20. The method of claim 19 , wherein the water-soluble polymer is chosen from polyvinyl alcohol, polyvinylpyrrolidone, methylcellulose, hydroxypropylcellulose, hydroxypropylmethylcellulose, polyethylene glycol, and mixtures thereof.

21. The method of claim 19 , wherein the water-insoluble polymer is chosen from ethylcellulose, cellulose acetate cellulose propionate cellulose acetate propionate, cellulose acetate butyrate, cellulose acetate phthalate, cellulose triacetate, poly(methyl methacrylate), poly(ethyl methacrylate), poly(butyl methacrylate), poly(isobutyl methacrylate), and poly(hexyl methacrylate), poly(isodecyl methacrylate), poly(lauryl methacrylate), poly(phenyl methacrylate), poly(methyl acrylate), poly(isopropyl acrylate), poly(isobutyl acrylate), poly(octadecyl acrylate), poly(ethylene), poly(ethylene) low density, poly(ethylene) high density, poly(ethylene oxide), poly(ethylene terephthalate), poly(vinyl isobutyl ether), poly(vinyl acetate), poly(vinyl chloride) or polyurethane, and mixtures thereof.

22. The method of claim 18 , wherein the modified-release formulation is an osmotic pump dosage form.

23. The method of claim 18 , wherein the modified-release formulation is a matrix system dosage form.

24. The method of claim 18 , wherein the modified-release formulation is a membrane controlled dosage form.

25. The method of claim 18 , wherein the modified-release formulation comprises a functional coating.

26. The method of claim 18 , wherein the modified-release formulation is provided in the form of a caplet, capsule, bead, granule, particle for suspension prior to dosing, sachet, or tablet.

27. A method for preventing an increase in gastrointestinal motility in a subject in need of said method; comprising administering a therapeutically effective amount of enriched (R)-verapamil, or a pharmaceutically acceptable salt thereof, to said subject wherein the (R)-verapamil is at least about 98% enriched with respect to its (S) stereoisomer.

28. A method for managing an increase; in gastrointestinal motility in a subject in need of said method; comprising administering a therapeutically effective amount of enriched (R)-verapamil, or a pharmaceutically acceptable salt thereof, to said subject, wherein the (R)-verapamil is at least about 98% enriched with respect to its (S) stereoisomer.

29. A method for reducing an increase; in gastrointestinal motility in a subject in need of said method comprising administering a therapeutically effective amount of enriched (R)-verapamil, or a pharmaceutically acceptable salt thereof, to said subject, wherein the (R)-verapamil is at least about 98% enriched with respect to its (S) stereoisomer.