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A member asked:
What will happen if you mix caffeine medicine (vivarin) with sleep medicine (unisoms)?
A doctor has provided 1 answer
Best not.: Since it is possible to overdose on caffeine and diphenhydramine I would not mix the two. Sleeplessness, restlessness, possible tachycardia, confusion, increase in blood pressure are all possible. If you need stimulants to work, and sleep meds to counteract their effects, you have a problem best talked about with your provider, who can help you with lifestyle change and your chemistry experiment
Answered 5/2/2015
2.9k views
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