Sildenafil comes as a tablet and suspension liquid to take by mouth. Men with untreated ED had relatively low baseline scores for all aspects of sexual function measured again using a 5-point scale in the IIEF. VIAGRA improved these aspects of sexual function: frequency, firmness and maintenance of erections; frequency of orgasm; frequency and level of desire; frequency, satisfaction and enjoyment of intercourse; and overall relationship satisfaction. The titration studies, in which most patients received mg, showed similar results. The major circulating metabolite results from N-desmethylation of sildenafil, and is itself further metabolized. Shake the liquid well for 10 seconds before each use to mix the medication evenly.Rarely reported side effects include: an erection that will not go away (priapism). If you have an erection that lasts more than 4 hours, get medical help right away. If it is not treated right away, priapism can permanently damage your penis. sudden vision loss in one or both eyes. How much does generic Viagra cost? Generic Viagra usually costs anywhere from about $2–$18 for each tablet depending on the dosage and manufacturer. Can I buy generic . Examples of Viagra’s more commonly reported side effects include: headache. flushing (temporary warmth, redness, or deepening of skin color) stuffy nose. indigestion (upset stomach) mild vision.

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