Displaying 2 results of Drotaverine Hydrochloride Impurities Drotaverine hydrochloride is a medication used to treat smooth muscle spasms in the gastrointestinal and genitourinary tracts. However, during the manufacturing process, impurities can be introduced into the final product. These impurities can affect the efficacy and safety of the medication, and must be carefully monitored and controlled to ensure the highest quality product. Common impurities in drotaverine hydrochloride include related substances and residual solvents.