DRUG DESCRIPTION
ORBIVAN™ Butalbital, Acetaminophen and Caffeine Capsules, USP are supplied
in hard-gelatin capsule form for oral administration.
Each capsule contains the following active ingredients:
| Butalbital, USP | 50 mg |
| Acetaminophen, USP | 300 mg |
| Caffeine, USP | 40 mg |
Inactive Ingredients: sodium lauryl sulfate, talc, microcrystalline
cellulose, stearic acid, D&C yellow #10, FD&C red#40, titanium dioxide,
FD&C blue #1, FD&C yellow #6, gelatin.
Butalbital (5-allyl-5-isobutylbarbituric acid), is a short to intermediate-acting
barbiturate of molecular weight 212.25. It has the following structural formula:
 |
Acetaminophen (4'-hydroxyacetanilide), is a non-opiate, non-salicylate analgesic
and antipyretic of molecular weight 151.16. It has the following structural
formula:
 |
Caffeine (1,3,7-trimethylxanthine), is a central nervous system stimulant of
molecular weight 194.19. It has the following structural formula:
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