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This product is to be used by or under the direction of a physician.
Each vial contains a sufficient amount to permit withdrawal and administration of the volume specified on the label.
Papaverine Hydrochloride, USP, is the hydrochloride of an alkaloid obtained from opium or prepared synthetically. It belongs to the benzylisoquinoline group of alkaloids.
Papaverine Hydrochloride, USP, is 6,7-dimethoxy-1- veratrylisoquinoline hydrochloride and contains, on the dried basis, not less than 98.5% of C20H21NO4•HCI. The molecular weight is 375.85. The structural formula is as shown.
Papaverine Hydrochloride occurs as white crystals or white crystalline powder. One gram dissolves in about 30 mL of water and in 120 mL of alcohol. It is soluble in chloroform and practically insoluble in ether.
Papaverine Hydrochloride Injection, USP, is a clear, colorless to pale-yellow solution.
Papaverine Hydrochloride, for parenteral administration, is a smooth-muscle relaxant that is available in vials containing 30 mg/mL. Each vial also contains edetate disodium 0.005%. The 10 mL vials also contain chlorobutanol 0.5% as a preservative. pH may be adjusted with sodium citrate and/or citric acid.
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