(WARNING: May be habit forming)

Aspirin (acetylsalicylic acid) occurs as white crystals, commonly tabular or needle-like, or white, crystalline powder. It is odorless or has a faint odor. Its chemical name is: 2-(acetyloxy)benzoic acid. Its molecular formula is:

C₉H₈O₄ with a molecular weight of 180.16

Codeine is an alkaloid, obtained from opium or prepared from morphine by methylation. Codeine phosphate occurs as fine, white, needle-shaped crystals, or white, crystalline powder. It is odorless and is affected by light. Its chemical name is: 7,8-didehydro-4,5oe epoxy-3-methoxy-17~ methylmorphinan~6oe-ol phosphate (1 :1) (salt) hemihydrate. Its molecular formula is:

C₁₈H₂₁NO₃†H₃PO₄†1/2 H₂O with a molecular weight of 406.37

Aspirin and codeine phosphate tablets for oral administration combine the following inactive ingredients: colloidal silicon dioxide, corn starch, microcrystalline cellulose, povidone, and stearic acid.

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