Assertion: antihistamine's side effect | /r/HasProperty | drowsiness
Facets:
Source sentences:
text: Less-serious side effects are common, the most notable being drowsiness.
text: The most common side effect in adults is drowsiness.
text: The most common side effect of promethazine is drowsiness.
text: The major side effect of first generation antihistamines is drowsiness, which may be severe in some people.