Abstract: Levamisole hydrochloride was orally administered at 3.75, 7.5, 15.0 and 30.0 mg kg-1 b.w. doses to different groups of Ranikhet La Sota vaccinated broiler chicks. Levamisole hydrochloride( given orally ) in all dose levels tested showed reduced Cumulative feed intake, better cumulative feed efficiency and enhanced Cumulative body weight gain.