비아그라에 대해 알아야 할 고려 사항
Your health care provider may start you with a decreased dosage of sildenafil. This tends to enable avoid levels of this drug from building up in One's body.Priapism warning: This drug could cause priapism, which is an erection that won’t disappear. If you have an erection that lasts over four hours, contact 911 or check out the nearest emergency