药物信息为Butalbital, Aspirin, and Caffeine Tablets, USP (West-ward Pharmaceutical Corp.): DESCRIPTION

Each Butalbital, Aspirin, and Caffeine Tablet for oral administration contains:

Butalbital, USP.....................50 mg

Aspirin, USP.......................325 mg

Caffeine, USP.......................40 mg

Butalbital, 5-allyl-5-isobutylbarbituric acid, a white, odorless, crystalline powder having a slightly bitter taste, is a short to intermediate-acting barbiturate. It has the following structural formula:

Aspirin, salicylic acid acetate, is a non-opiate analgesic, anti-inflammatory and antipyretic agent. It occurs as a white, crystalline tabular or needle-like powder and is odorless or has a faint odor. It has the following structural formula:

Caffeine, 1,3,7,-trimethylxanthine, is a central nervous system stimulant which occurs as a white powder or white glistening needles. It also has a bitter taste. Its structure is as follows:

Inactive Ingredients: Corn Starch, Hydrogenated Vegetable Oil, Microcrystalline Cellulose, Pregelatinized Starch, Sodium Starch Glycolate and Talc.