Which of the following agent is not used in erectile dysfunction:
Alpha blockers are used in erectile dysfunction not alpha agonists (phenyephrine).
Drugs useful in the management of erectile dysfuncLion (ED)
1. Phosphodiesterase inhibitors

Sildenafil
Vardenafi
Tadalafil
Udenafil

2. PGE1 analog - Alprostadil
3. Aviptadil
PGE2
Vardenafil
Phenylephrine
Alprostadil