| Word | Definitions | Synonyms |
|---|---|---|
| sildenafil | (noun) virility drug (trade name Viagra) used to treat erectile dysfunction in men | Synonyms: sildenafil citrate, Viagra |
| tadalafil | (noun) virility drug (trade name Cialis) used to treat erectile dysfunction in men | Synonyms: Cialis |
| vardenafil | (noun) virility drug (trade name Levitra) used to treat erectile dysfunction in men | Synonyms: Levitra |