» Tetracycline Hydrochloride for Topical Solution is a dry mixture of Tetracycline Hydrochloride and Epitetracycline Hydrochloride with Sodium Metabisulfite packaged in conjunction with a suitable aqueous vehicle. It contains not less than 90.0 percent and not more than 130.0 percent of the labeled amount of tetracycline hydrochloride, when constituted as directed.