Dramamine

Dimenhydrinate, also known as diphenhydramine/8-chlorotheophylline salt and sold under the brand name Dramamine, among others, is an over-the-counter medication used to treat motion sickness and nausea. Dimenhydrinate is a theoclate salt composed of diphenhydramine and 8-chlorotheophylline (a theophylline relative) in a 1:1 ratio. Dimenhydrinate was introduced to the market by G.D. Searle in 1949.