Assertion: diphenhydramine | /r/CapableOf | block effect
Facets:
Source sentences:
text: Diphenhydramine is an antihistamine medication that blocks the effects brought on by allergies and has become a staple in the treatment of allergies.
text: It was the first drug approved as a prescription antihistamine, blocking the effects on the body of a naturally occurring chemical called histamine, which the human body produces as a response to allergens.