Etrax® is an anthelmintic syrup manufactured by ACI Limited in Bangladesh. Each 5 ml of the syrup contains 40 mg of Levamisole Hydrochloride, which is the active laevo-isomer of tetramisole. Levamisole works by paralyzing susceptible intestinal worms, which are then excreted from the intestines. Additionally, it enhances cellular immune responses in humans.