Sildenafil, widely known under the brand name Viagra, is a medication primarily used for treating erectile dysfunction (ED) and pulmonary arterial hypertension. Mechanism of Action Sildenafil works by inhibiting an enzyme called phosphodiesterase type 5 (PDE5).
This inhibition leads to an increase in the levels of cyclic guanosine monophosphate (cGMP), which relaxes the smooth muscle cells in th.....
