If you are trying to sleep id highly recommend you use benadyrl or generic diphenhydramine 25 mg instead of dramamine. Dramamine contains diphenhydramine like benadyrl however, also contains chlorotheophylline (*I beieve some chloroxanthine) which acts similarly to caffeine to antagonize adenosine a receptor that builds throughout the day and contributed to drowsiness. Therefore, dramamine contains a cns stimulant. Also, I would be very careful not to consume tol much diphenhydramine if you want to be sleepy and relaxed. Low doses of diphenhydramine block histamine which is involved in wakefulness. Therefore, blocking it can cause a slight sedative effect. However, high doses of diphenhydramine block muscarinic acetylcholine receptors which play a important role in your parasympathetic. (Rest) nervous system the result could be racing heart rate , restlessness, anxiety, and tremor.