Assertion: viagra's effect | /r/CapableOf | observe in few patients
Facets:
value: in controlled clinical trials.1 217
type: LOCATION
Source sentences:
text: Sudden decrease or loss of hearing reported with all PDE type 5 inhibitors, including sildenafil.1 203 214 216 217 218 Adverse otic effects (e.g., deafness, otic pain, tinnitus) observed in a few patients in controlled clinical trials.1 217