the setting is perfect. you know what? plenty of guys have this issue, not just getting an erection, but keeping it. well, viagra helps guys with ed get and keep an erection. and you only take it when you need it. good to know, right? if ed is stopping what you started... ask you doctor about viagra. [ male announcer ] ask your doctor if your heart is healthy enough for sex. do not take viagra if you take nitrates for chest pain; it may cause an unsafe drop in blood pressure. side effects include headache, flushing, upset stomach and abnormal vision. to avoid long-term injury, seek immediate medical help for an erection lasting more than four hours. stop taking viagra and call your doctor right away if you experience a sudden decrease or loss