The use of clemastine ("Tavegil') administered parenterally in acute allergic episodes

An open study was carried out in 41 patients, requireing an emergency doctor visit because of an acute allergic episode, to assess the effectiveness of an antihistamine, clemastine, given parenterally. The results showed that a single intramuscular injection of 2 mg clemastine was 'fully effective' in relieving the sumptoms of 19 (46.3%) patients, and gave 'some relief' in 20 (48.8%). Two (4.9%) patients failed to respond. No side-effects of treatment were reported.