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However, when he added Viagra to the tissue bath the penile blood vessels suddenly relaxed - as they would for a man to give him an erection. He said: quot;What was amazing about this study was that we saw a restoration of the erectile response. Now we were on to something which could only be described as specialquot. Before the launch of Viagra in 1998 there was no oral treatment for erectile dysfunction, the only inter viagra were an injection or a adolorin dosierung viagra gruesome prosthetic implant. Now, thanks to a failed Angina treatment, men had another option. Viagra is now one of the most prescribed drugs in the world. Drugs go through careful and rigorous trials before they are released to the market but in many senses the real trial only begins when large populations of people start taking them.

Viagra (sildenafil) is taken by mouth usually as a 25 or 50 milligram (mg) tablet one hour before sexual activity. However, Viagra may be adolorin dosierung viagra within a range of one-half hour to four hours before sex. The dose may be adjusted based on doctor recommendations, but it should not exceed 100 mg per dose or be taken more than once per day. A physician will prescribe your specific dose. Have your pharmacist check for drug interactions, too. Men who use nitrates (such as nitroglycerin or isosorbide) should never use Viagra or other PDE5 inhibitors (Cialis, Levitra, Stenda, or Staxyn) due to severe, possibly fatal hypotension (low blood pressure). Viarga Viagra Have Side Effects.

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Viagra is also effective in keeping high blood pressure under control. The drug is effective in both cases because of the mechanism of action. Sildenfil citrate helps to relax muscles and increases blood supply to certain organ. This is why the drug is effective for the above mentioned problems and has also been used by sportsmen for enhancing their performance.

To decrease the chance of adverse reactions in patients taking ritonavir, a decrease in sildenafil dosage is recommended [see DOSAGE AND ADMINISTRATIONDRUG INTERACTIONSand CLINICAL PHARMACOLOGY ]. Combination With Other PDE5 Inhibitors Or Other Erectile Dysfunction Therapies. The safety and efficacy of combinations of VIAGRA with other PDE5 Inhibitors, including REVATIO or other pulmonary arterial hypertension (PAH) treatments containing sildenafil, or other treatments for erectile dysfunction have not been studied.]