For more information, work with a member of our medical team who can order lab tests to look for any critical underlying problems. These medicines prevent an enzyme called phosphodiesterase type-5 from working too quickly. 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. Please expect up to 4 to 6 weeks for reimbursement. You can get a prescription online following a quick and easy visit with a member of our clinical team.Savings will vary by medication and by pharmacy. The discount plan organization is Hippo Network LLC, One World Trade Center, Suite New York, NY , .  · Viagra; Descriptions. Sildenafil is used to treat men who have erectile dysfunction (also called sexual impotence). Sildenafil belongs to a group of medicines . If you are taking sildenafil (Viagra) for ED, do not take it more than once a day. Take an hour before sexual stimulation (range 30 minutes to 4 hours). If you take it .