Assertion: antihistamine | /r/HasProperty | limited value
Facets:
value: in perennial vasomotor rhinitis
type: LOCATION
Source sentences:
text: In general, the H 1 antihistamines tend to be more successful in controlling acute than chronic conditions; thus, they are most useful at the beginning of the hay-fever season, when the allergens are present in low concentration, but in perennial vasomotor rhinitis (nonseasonal, nonallergic inflammation of the mucous membranes of the nose brought on by environmental or emotional stimuli) they are only of limited value.