Assertion: diphenhydramine's side effect | /r/HasProperty | headache
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Source sentences:
text: Other side effects include gastrointestinal irritation, headache, blurred vision, and dryness of the mouth.
text: Possible side effects include pain in the extremities and back, as well as vomiting and headache.
text: Common side effects of diphenhydramine include drowsiness, dizziness, nausea, headache or loss of appetite, reports Everyday Health.