Viagra (sildenafil citrate) is often prescribed for male patients that need to be taking some drugs to get erections hard enough to have sex. Viagra is a medicine that can help you treat your erectile dysfunction, but it is not the cure you are looking for. Make sure you tell your doctor about any medical conditions you have that may affect the success of your treatment in any way. The following ones are supposed to be reported: stomach ulcer, heart attack, kidney disease, coronary artery disease, bleeding disorder, history of a stroke, blood cell disorder, abnormal blood pressure, and any other ones you think are important. It is not necessary to go to your doctor for that - it is quite easy to get your Viagra online along with a free consultation of a qualified professional. You will be able to learn more about your dose and how you will need to take Viagra. Make sure you never take this medicine without first getting professional advice if you are already taking efavirenz, nevirapine, medications for high blood pressure, erythromycin, certain barbiturates, beta blockers, certain antifungals, seizure medications, other medications for erectile dysfunction, HIV protease inhibitors, anticoagulants, cimetidine, or alpha blockers.