Antibiotics, antifungals, and HIV protease inhibitor drugs are all processed in the liver, just like Viagra. What special precautions should I follow? Do not use this medicine if you are also using a nitrate medicine, often used to treat angina or high blood pressure. If you are taking sildenafil to treat PAH, you will probably take sildenafil three times a day with or without food. Sildenafil usually should not be taken more than once every 24 hours. Doctors that work at these urgent care clinics are able to prescribe medications just as a primary care physician would. Connect with one of Felix’s healthcare practitioners today.Typical dosing for Sildenafil (Viagra) The typical dose is to take 50 mg of sildenafil (Viagra) by mouth, about 1 hour before sex, as needed. The maximum recommended dose is mg. Don’t take sildenafil (Viagra) more than once daily (at any dose). Written by Brian Leonard, PharmD, BCACP, BCGP. AdSay Goodbye to Performance Anxiety and Hello to Improved Sexual Stamina! Trust Our Unbiased Reviews and Improve Your Sexual Health in Confidence!test1.ru has been visited by 10K+ users in the past month. 1 day ago · Hims is a telehealth company that provides both prescription and over-the-counter generic and brand-name medications. The brand focuses mainly on five medications, including Viagra, that have.