Erectile dysfunction medications require a prescription from a licensed provider. Some services offer a subscription option where they’ll send your medications every month at a discount. It’s available in 10 mg and 20 mg tablets. The information provided is for educational purposes only and is not intended to replace discussions with a healthcare provider. That’s not to say there aren’t just as many illegitimate sites.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 . Still, if your doctor says it’s okay for you to use and you end up paying out-of-pocket, you can still get the generic for a lot less than Viagra. According to price . Download. Email. With the VIAGRA Savings Card, eligible patients may save 50% on up to 12 prescriptions of brand-name VIAGRA per year.*. *Eligible patients could save up to .