Assertion: nitrous oxide's use | /r/HasProperty | an α 1 blocker
Facets:
Source sentences:
text: The use of sildenafil and an α 1 blocker (typically prescribed for hypertension or for urologic conditions, such as benign prostatic hypertrophy) at the same time may lead to low blood pressure, but this effect does not occur if they are taken at least 4 hours apart.