Treatment of Active Nausea and Motion Sickness with Dimenhydrinate

Clinical Guidelines and Recommendations

• The American Gastroenterological Association recommends antihistamines like meclizine for motion sickness treatment, not just prevention, which supports the therapeutic use of dimenhydrinate 6

Comparative Effectiveness and Evidence

• Antihistamines are probably more effective than placebo at preventing motion sickness symptoms under natural conditions, with 40% vs 25% symptom prevention, according to a 2022 Cochrane review, although the specific effectiveness of dimenhydrinate is not detailed in this context 1, 2, 3, 4