Table 5.

Reported side effects by treatment group; number (%) of subjects who experienced at least one episode of each event.

Event	Sildenafil (n = 27)	Placebo (n = 28)
Headache	9 (33%)	5 (18%)
Flushing	5 (19%)	0 (0%)
Dizziness	2 (7%)	2 (7%)
Nausea/Vomiting	2 (7%)	0 (0%)
Abdominal Pain	1 (4%)	0 (0%)
Kidney Stone	1 (4%)	0 (0%)
Photosensitivity	1 (4%)	0 (0%)
Rash	1 (4%)	0 (0%)
Diarrhea	0 (0%)	1 (4%)
Hypotension	0 (0%)	1 (4%)
Muscle Pain	0 (0%)	1 (4%)
Tinnities	0 (0%)	1 (4%)
Tremulous	0 (0%)	1 (4%)
Any Event	11 (41%)	10 (36%)