Table 2. Characteristics of intra-cavernous injection drugs in the diagnosis of vascular erectile dysfunction.

Drugs	Pharmacological	Mean dose	Minimal dose	Maximal dose	Sensitivity	Side effect rate	Adverse effect
Papaverine	opium alkaloid	17 mg	2 mg	90 mg	91%	13%	Pain; anxiety; fibrosis; priapism; infections; ecchymosis; penile lump
Papaverine + Phentolamine	α-adrenergic blocking agent	15 mg + 0.4 mg	10 mg + 0.25 mg	80 mg + 10 mg	93%	30%
Alprostadil	α1-adrenergic blocking agent	12 µg	1 µg	40 µg	80%	13%