Levamisole: A multi-faceted drug in dermatology.

Levamisole, the levo-isomer of tetramisole, is readily soluble in water and is rapidly absorbed from the gastro intestinal tract; peak blood levels are achieved after 1.5–4 h. Its plasma half-life is 16 h and it is metabolized mainly in the liver.[1,3] Usually, it is administered at a dose of 150 mg/day for 2–4 days each week but for the management of malignancies or immunodeficiencies a higher dose or prolonged treatment regimens are recommended.[1,4]