Do viagra pills work?
On One Hand: Viagra WorksViagra, the drug prescribed for erectile disfunction, works by inhibiting an enzyme called phosphodiesterase 5. This enzyme breaks down a chemical called cyclic guanosine monophosphate, which relaxes the arteries of the penis and allows greater blood flow. A study by the Veteran’s Association found that Viagra worked 66 percent of the time, and that 85 percent of the men taking it were able to have sex at least once a day, as compared to 45 percent of the placebo group.On the Other: Potential Side EffectsHowever, Viagra does come with its share of side effects. Common side effects include warmth and redness in the face, neck, and chest, stuffy nose, headache, memory problems, back pain and upset stomach. Extreme symptoms include dizziness or nausea, pain, numbness, or tingling, shortness of breath, swelling, or an erection that lasts for four hours or longer.
