Table 2.

Common adverse events (>1%) of sildenafil (from European Medicine Agency statements on product characteristics)

Adverse event	Sildenafil	Placebo
Headache	10.8%	2.8%
Flushing	10.9%	1.4%
Abnormal vision	3.6%	0.4%
Dyspepsia	3%	0.4%
Nasal congestion	2.1%	0.3%
Dizziness	2.9%	1%
Palpitation	1%	0.2%