Propoxyphene hydrochloride is an odorless, white crystalline powder with a bitter taste. It is freely soluble in water. Chemically, it is alpha (+)-4-(Dimethylamino)-3-methyl-1,2-diphenyl-2-butanol Propionate Hydrochloride.

AGGRENOX (aspirin, extended-release dipyridamole) is a combination antiplatelet agent intended for oral administration. Each hard gelatin capsule contains 200 mg dipyridamole in an extended-release form and 25 mg aspirin, as an immediate-release sugar-coated tablet. In addition, each capsule contains the following inactive ingredients: acacia, aluminum stearate, colloidal silicon dioxide, corn starch, dimethicone, hypromellose, hypromellose phthalate, lactose monohydrate, methacrylic acid copolymer, microcrystalline cellulose, povidone, stearic acid, sucrose, talc, tartaric acid, titanium dioxide and triacetin.

This is a combination product containing Carisoprodol, a centrally-acting muscle relaxant, plus aspirin, an analgesic with antipyretic and anti-inflammatory properties. It is available as a two layered, white and light lavender round tablet for oral administration. Chemically, Carisoprodol is N-isopropyl-2-methyl-2-propyl-1, 3-propanediol dicarbamate. Its empirical formula is C12H24N2O4, with a molecular weight of 260.33. The structural formula is:

Soma Compound (carisoprodol and aspirin tablets, USP) is a fixed-dose combination product containing the following two products:

Active ingredient (in each tablet)
Aspirin (acetylsalicylic acid). Pain reliever/fever reducer

TALWIN Compound (pentazocine and aspirin) is a combination of pentazocine hydrochloride, USP, equivalent to 12.5 mg base and aspirin, USP, 325 mg.

Soma Compound with Codeine (carisoprodol, aspirin, and codeine phosphate tablets) (carisoprodol, aspirin, and codeine phosphate tablets, USP) is a fixed-dose combination product containing the following three products:

Each PERCODAN (aspirin and oxycodone hydrochloride) Tablet contains:

Aspirin and Codeine
(acetylsalicylic acid and codeine)

Each tablet of Equagesic (meprobamate and aspirin) contains 200 mg meprobamate and 325 mg aspirin. The inactive ingredients present are cellulose, D&C Yellow 10, FD&C Red 3, FD&C Yellow 6, hydrogenated vegetable oil, magnesium stearate, polacrilin potassium, and starch.