After oral administration fasting , Levitra generally reaches peak concentrations in the plasma and in the semen within two hours. All PDE5 inhibitors, including Viagra and Cialis, require a valid prescription regardless of the pharmacy or provider. Follow-up support: Make sure you can get the help you need if questions or concerns arise after ordering. Medical consultations were also taken into consideration, as PDE5 inhibitors require a valid prescription from a licensed medical provider. Levitra medication should not be taken with nitrates or nitric oxide donors.Levitra, 10 MG Tablet. How Amazon Pharmacy works. Save time, let us bring the pharmacy to you. Amazon Prime members get additional benefits including FREE 2-Day Delivery and low prices on medications. About this medication. VARDENAFIL (var DEN a fil) treats erectile dysfunction (ED). Vardenafil (Levitra): Uses, Alternatives, Side Effects & More – GoodRx feeling faint or weak, dizziness, blurry vision, feeling confused Erection lasting for more than 4 hours Headache (up to 15%) Flushing (up to 11%) Stuffy nose (up to 9%) Indigestion (up to 4%) —skin rash,, swelling of the face, lips, tongue, or throat. Vardenafil is FDA approved to treat erectile dysfunction (ED). It works by allowing more blood to flow to your penis and making it easier to achieve an erection. Generic vardenafil is equally as.