Compare this mechanism of action with that of nitrates in vasodilation.
The adverse effects of sildenafil result from the vasodilating mechanism and include headache, flushing and dizziness.
Sildenafil should not be combined with which of the following drugs?
Extra info: Nitrates act in the similar physiological process of vasodilation. And thus a combination of sildenafil with nitrates, can decrease the blood pressure too much resulting in hypotension.