These small differences affect the way each medication works, such as how quickly it takes effect and wears off, and the possible side effects. If it is not treated right away, priapism can permanently damage your penis sudden vision loss in one or both eyes. When oral medications might not be safe Check with your health care team before you take any medicine for erectile dysfunction. Box , Mission, KS If your pharmacy does not participate, you may be able to submit a request for a rebate in connection with this Savings Offer. Especially tell your healthcare provider if you take any of the following: medicines called nitrates medicines called guanylate cyclase stimulators such as Adempas riociguat medicines called alpha-blockers, such as Hytrin terazosin HCl , Flomax tamsulosin HCl , Cardura doxazosin mesylate , Minipress prazosin HCl , Uroxatral alfuzosin HCl , Jalyn dutasteride and tamsulosin HCl , or Rapaflo silodosin. Vardenafil usually works for 4 to 5 hours.AdTake Charge of Your Sexual Health with Our Top-Rated Male Enhancement Products! Trust Our Unbiased Reviews and Improve Your Sexual Health in Confidence!test1.ru has been visited by 10K+ users in the past monthOver 20 Years Online · Over Products Tested · Honest & Unbiased Reviews. By Mayo Clinic Staff Medicines that you take by mouth are called oral medicines. They’re often the first line of treatment for trouble getting or keeping an . Tell your healthcare provider about all the medicines you take, including prescription and over-the-counter medicines, vitamins, and herbal supplements. VIAGRA may affect the .