OK.... erections drugs can cause a lot of harm, and who ever uses them should only do so under the direction of a doctor. Heart attact, blood clots, high blood preasure issues are just a few. That being said, there are other things you can try. Buy an erection ring, this will constrict the blood flow hence sustained harder erection; there are always creams and lotions that are suppose to enhance or sustain erection. I would try those and forget the drugs.