Viagra (sildenafil citrate) can be used to help patients achieve an erection hard enough to complete sexual intercourse. It’s a PDE5 inhibitor that stimulates blood inflow to the penis and prevents the blood from escaping back into the body. Although Viagra is considered to be a safe medicine that rarely causes serious side effects, talking to your doctor before the treatment is strongly recommended. When discussing your health condition with your physician make sure you mention the fact of having some or any of the following conditions: high or low blood pressure, a history of a stroke or heart attack within the last six months, multiple myeloma, sickle cell anemia, leukemia, and a number of others. Some of these conditions can require a dose adjustment or you may not be able to take this medicine at all.

Some of the mild side effects of Viagra can include headache, nasal congestion and facial flushing. If these side effects do not go away on their own or change in intensity report them to your health care provider. In case of experiencing such side effects as irregular heartbeat, vision changes, sudden vision loss, light-headedness, chest pain, sweating nausea, a painful penis erection, ringing in your ears and sudden loss of hearing stop taking this drug and call your health care provider. Viagra is a prescription medication that must not be shared with other people. There are some conditions that can render your treatment inefficient or prevent you from taking Viagra at all. Do not start taking any new drugs without first discussing it with your health care provider. Drug interactions have been reported with antidepressants, antibiotics, blood pressure medicines, HIV or AIDS medicines, enoxacin, isoniazid, imatinib, diclofenac, conivaptan, bosentan, cimetidine and rifampin.