“…Its action as appetite stimulant appears not to be due to a hypoglycaemic-induced hyperphagia or an increase in endogenous growth hormones (Bergen, 1964;Stiel et al, 1970). Cyproheptadine is broadly used in human patients, including children, that suffer from diseases such as cancer, HIV, cystic fibrosis and eating disorders (see Chinuck et al, 2007;Couluris et al, 2008;Mahachoklertwattana et al, 2009), where an increase in body mass is desirable. Cyproheptadine is also used as an antihistaminic because it blocks H 1 histamine receptors (Stone et al, 1961) and, similar to other antihistaminic substances, cyproheptadine has minimal side effects, consisting mainly of transient drowsiness [see Homnick et al (Homnick et al, 2004) and references therein].…”