Q. I have been relying on the antihistamine diphenhydramine to get to sleep for more than a decade. But over the last few years, I have found that I am having trouble coming up with simple words when ...
The first antihistamine that the Food and Drug Administration approved was diphenhydramine. The compound was created in 1943, and the Parke-Davis pharmaceutical company brought it to market in 1946 ...
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