It lasts 4 to 5 hours, or longer if you have mild to moderate ED. Make sure you have discussed any other medications you are currently taking or plan to take before starting sildenafil with your doctor and pharmacist. Physical or psychological factors can impact sexual function, desire, and arousal, all of which can cause ED. Data shared with Viatris will be aggregated and de-identified; it will be combined with data related to other Savings Offer redemptions and will not identify you Viatris reserves the right to rescind, revoke, or amend this Savings Offer without notice No membership fees. Viagra, Levitra and Cialis are all medications called phosphodiesterase inhibitors. Illicit drugs and certain prescription medications like barbiturates, antidepressants, and anti-seizure medications can actually cause or exacerbate ED or loss of libido as a side effect. In some patients, the use of VIAGRA with alpha-blockers can lead to a drop in blood pressure or to fainting medicines called HIV protease inhibitors, such as ritonavir Norvir , indinavir sulfate Crixivan , saquinavir Fortovase or Invirase , or atazanavir sulfate Reyataz some types of oral antifungal medicines, such as ketoconazole Nizoral and itraconazole Sporanox some types of antibiotics, such as clarithromycin Biaxin , telithromycin Ketek , or erythromycin other medicines that treat high blood pressure other medicines or treatments for ED VIAGRA contains sildenafil, which is the same medicine found in another drug called REVATIO.Viagra is approved for this use in males ages 18 years and older. Viagra contains the drug sildenafil. It belongs to a class of drugs called phosphodiesterase type 5 (PDE5) . Specifically, you may have a lower starting dosage than usual if you’re over age For example, a year-old might start at a dose of 50 milligrams (mg), while a year-old . Treating Erectile Dysfunction Coping Erectile dysfunction (ED) becomes more common as people get older because testosterone levels drop over time. In fact, age is the variable .