Within 24 hours, a healthcare provider will contact you for further information and to present you with several options. These include a heart attack, stroke or a serious heart rhythm disorder in the past six months. You can see an in-person provider or speak with a doctor virtually. This boosts blood flow and helps you get an erection from sexual activity. All PDE5 inhibitors, including Viagra and Cialis, require a valid prescription regardless of the pharmacy or provider. One way to ensure it’s legal and safe to buy is that the site or seller requires a doctor’s prescription.You can often consult a board-certified provider and secure a prescription in as little as 15 minutes. That said, it’s not always easy to find reputable providers so to help, we . 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 . Getting a prescription for Viagra isn’t hard. Erectile dysfunction is common and you don’t need to be a certain age to get a prescription for Viagra. If you’re generally .