<prompt> All are true about levamisole except -Acts as an immunostimulatorAct as an immunodepressor in high dosesSingle dose is sufficient for the treatment ofpsoriasisActs as antihelminthic by causing depolarization  <response>: Ans. is c i.e., Single dose is sufficient for the treatment of psoriasis Levamisol o Levamisol is an antihelminthic drug and causes depolarization by stimulating nicotinic receptors. o Levamisol also has immunomodulatory action : i Immunostimulation at low doses Immunosuppression at high doses o Uses i Colorectal carcinoma ii Pediculosis Psoriasis : slow to act and requires two day therapy per week for prolonged period. 