Hydralazine hydrochloride tablets USP, is an antihypertensive, for oral administration. Its chemical name is 1-hydrazinophthalazine monohydrochloride, and its structural formula is:
Hydralazine hydrochloride, USP is a white to off-white, odorless crystalline powder. It is soluble in water, slightly soluble in alcohol, and very slightly soluble in ether. It melts at about 275°C, with decomposition.
Each tablet for oral administration contains 10 mg, 25 mg, or 50 mg hydralazine hydrochloride, USP. Tablets also contain anhydrous lactose, FD&C yellow no. 6 aluminum lake, microcrystalline cellulose, sodium starch glycolate, and stearic acid.