Insurance can help you save even more on consultations and medications. These sites may send you dangerous counterfeits instead of the meds you need. In some cases, online ED providers accept health insurance. All PDE5 inhibitors, including Viagra and Cialis, require a valid prescription regardless of the pharmacy or provider. Insurance: If you plan to use insurance, make sure the online provider accepts it. An erection results from an increase in blood flow to the penis.While generic sildenafil and Viagra are equally safe and effective, the medications have one key difference: price. Viagra costs around $60–$70 per tablet. Generic sildenafil . Sildenafil Prices, Coupons and Patient Assistance Programs. Sildenafil is a member of the agents for pulmonary hypertension drug class and is commonly used for Erectile . Find the best sildenafil citrate or viagra prices near you now with our cost comparison tool and start saving today. Open Singup. SILDENAFIL CITRATE (Generic for VIAGRA) .