In some cases, online ED providers accept health insurance. Follow your doctor’s orders or the directions on the label. Do not use more of it and do not use it more often than your doctor ordered. Children younger than 1 year of age—Use and dose must be determined by your doctor. There are many safe, reliable online services offering ED prescriptions.A sildenafil (generic Viagra) membership starts at $20 monthly for six tablets of 30 mg. For $ each month, you’ll receive 34 sildenafil tablets of 45 mg each. Generic Viagra (sildenafil): $20 to $ per month. Generic Cialis (tadalafil): $20 to $ per month.  · Viagra comes as an oral tablet that contains the active drug sildenafil. Sildenafil is also available in generic form. Viagra is classified as a phosphodiesterase type 5 (PDE5) inhibitor. Find patient medical information for Viagra oral on MD including its uses, side effects and safety, interactions, pictures, warnings and user ratings.