Noun
vardenafil (uncountable)
(pharmacology) A piperazine drug used to treat erectile dysfunction.
The PDE5 inhibitors sildenafil (Viagra), vardenafil (Levitra) and tadalafil (Cialis) are prescription drugs which are taken orally. Source: Internet
Other drugs that operate by the same mechanism include tadalafil (Cialis) and vardenafil (Levitra). Source: Internet