There are many safe, reliable online services offering ED prescriptions. Shipping: Discreet, fast shipping is a must. Online pharmacies also may not fill short-term prescriptions, such as those for antibiotics. By stopping this enzyme, the drug allows better blood flow into the penis, meaning better erections. It depends on the platform and insurance provider. It’s available in 10 mg and 20 mg tablets. Refills: See if you can set up automatic refills or order as needed.According to price-comparison site test1.ru, generic Revatio will cost you as little as $ per pill, depending on where you fill your prescription. That’s compared with more than $50 per. CHOOSE BRAND-NAME VIAGRA. The original little blue pill prescribed by doctors for over 20 years. Clinically proven to treat men with erectile dysfunction (ED) Ongoing commitment to product quality and safety monitoring. Sildenafil (Viagra, Revatio) is a moderately priced drug used to treat erection problems in men. It is also used to treat pulmonary arterial hypertension, a serious heart and lung condition. This drug is more popular than comparable drugs. It is available in generic and brand versions.