sildenafil vs sildenafil citrate

sildenafil and sildenafil citrate both are nouns.

Word	Noun	Adjective	Verb	Adverb
sildenafil	Yes	No	No	No
sildenafil citrate	Yes	No	No	No

As nouns, sildenafil and sildenafil citrate are synonyms defined as:

sildenafil and sildenafil citrate: virility drug (trade name Viagra) used to treat erectile dysfunction in men

Other synonyms of sildenafil include Viagra.

sildenafil (noun)	sildenafil citrate (noun)
virility drug (trade name Viagra) used to treat erectile dysfunction in men	virility drug (trade name Viagra) used to treat erectile dysfunction in men