From: Indirect comparison of interventions using published randomised trials: systematic review of PDE-5 inhibitors for erectile dysfunction
Region
Sildenafil
Tadalafil
Vardenafil
Europe
2040
839
309
North America
2486
546
1658
South America
631
0
Asia
1026
279
Africa
254
Australia
63
World
448
Europe and North America
217
651
580
Europe and Australia
349