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This action is mediated by the secondary neurotransmitter no, which is primarily responsible for smooth muscle relaxation within the corpora cavernous. It manipulates and blocks an enzyme called phosphodiesterase-5 (pde-5), and helps the smooth muscles in the penis to get relaxed and widen, and that allows more blood to flow to the penis resulting in faster and easier erection. Viagra is available in 3 doses i.e. 25 mg, 50 mg, and 100 mg. The starting dose depends on the medical situation of a person. A man in his fifties and suffering from mild ED, which is due to ageing or any psychological factors, can start on the 25-mg dose. Men with moderate-to-severe ED can begin at the 50-mg dose, and, after testing the effect of the drug on at least 3 occasions (although 5-6 tries is recommended), the dose can be modified.
3 percent side effect rate experienced by the control group taking a placebo. Side effects from Sildenafil Citrate, Tadalafil, and Verdenafil included headache, diarrhea, dizziness, flushing, nasal congestion, and others. None of the patients involved in the studies experienced serious side effects and most occurred seldom. Even so, the manufacturers of Viagra and Levitra warn that it should not be taken in conjunction with certain medications, namely nitrates prescribed for coronary related conditions. Thus, a licensed physician who is knowledgeable about your entire medical history should assist you in making the decision to pursue a drug treatment of any type for Erectile Dysfunction. Their experience can help you determine whether Viagra (sildenafil citrate) is right for you.