Theophylline, Ephedrine Hydrochloride, and Phenobarbital Tablets

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» Theophylline, Ephedrine Hydrochloride, and Phenobarbital Tablets contain not less than 90.0 percent and not more than 110.0 percent of the labeled amounts of anhydrous theophylline (C₇H₈N₄O₂), ephedrine hydrochloride (C₁₀H₁₅NO·HCl), and phenobarbital (C₁₂H₁₂N₂O₃).

USP REFERENCE STANDARDS FOR PURCHASE

USP Phenobarbital RS
USP Ephedrine Sulfate RS
USP Theophylline RS

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