hange in blue/green color perception. This change in perception occurs because Sildenafil inhibits PDE6, “which is involved in phototransduction in the retina” (Sildenafil Citrate, par. 17). Also, Sildenafil causes a decrease in blood pressure, though the cause of this is unknown (Sildenafil Citrate, par.13); further common side effects include “headache, flushing, and upset stomach” (FDA, par. 6). Finally, it is recommended that those who take nitrates (such as nitroglycerin, often used for the treatment of angina) not take Sildenafil as it was shown to “potentiate [increase] the hypotensive effects of nitrates” (FDA, par. 5). ...
