You’ll soon start receiving the latest Mayo Clinic health information you requested in your inbox. If we combine this information with your protected health information, we will treat all of that information as protected health information and will only use or disclose that information as set forth in our notice of privacy practices. Privacy: Confirm that your personal data and payment details are confidential. Levitra vardenafil : This medication is taken one hour before sex and can last up to 24 hours. When taken at the correct time and paired with sexual stimulation, the erection lasts long enough for successful intercourse. · For oral dosage form (tablets): Adults up to 65 years of age—50 milligrams (mg) as a single dose no more than once a day, 1 hour before sexual intercourse. Alternatively, the medicine may be taken 30 minutes to 4 hours before sexual intercourse. Your doctor may adjust your dose if needed. Sildenafil is available through Optum Store by prescription in , , , mg pills. Optum Store allows for bulk ordering in a , , and day supply. Maria Hudson. 4 hrs. ago. Anna Nelson. 6 hrs. ago. David Muldon. 8 hrs. ago.