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For efficacy analyses, all patients with baseline and postbaseline observations on all variables in the statistical model were included. The IIEF erectile function domain, other domains, and individual items were analyzed using the last-observation-carried-forward convention, applied to each of the baseline and the postbaseline periods. The baseline and end point score for each SEP question was the patient’s percentage of "yes" responses to that question during the run-in and postbaseline periods, respectively. Vidalista must not be used if patient is taking nitrate drugs for heart problems such as nitroglycerine, isosorbide mononitrate or dinitrate, or if taking recreational drugs such as amyl nitrite or butyl nitrite. Combination of these drugs may cause a serious drop in blood pressure. When the blood vessel muscle cells relax, this expands the vessel and increases blood flow