Generic Viagra (sildenafil): $4 per 25 mg pill, $6 per 50 mg pill, $10 per mg pill; Branded Viagra: $90 per 25 mg, 50 mg, or mg pill; Generic Cialis (tadalafil): $11 per 5 mg pill, $44 per 10 mg or 20 mg pill; Generic Cialis Daily (tadalafil): $8 per mg or 5 mg pill; Branded Cialis: $10 per 5 mg pill, $80 per 10 mg or 20 mg pill.Popular ED medications found online include: Viagra sildenafil : As the first FDA-approved PDE5 inhibitor for ED, sildenafil is taken 30 minutes to four hours before sexual intercourse to help achieve and maintain an erection. It’s available in 50 mg, mg, and mg tablets. You are encouraged to report adverse events related to Viatris products by calling U. The most common symptoms of erectile dysfunction include difficulty achieving or maintaining an erection and reduced sexual desire. Sildenafil vs Tadalafil: Which is better? Those who don’t feel comfortable discussing ED with an in-person provider or lack time to visit a doctor’s office may find online ED prescriptions beneficial.Because Sildenafil is a generic, it’s cheaper than Viagra. But it’s the same drug and shouldn’t be any less effective. How does Sildenafil work? Sildenafil citrate is a type of drug called a PDE5 inhibitor, which just means that it stops the PDE5 enzyme from tightening up blood vessels in your penis. 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. Sildenafil is available at most retail pharmacy locations and several reputable online retailers, so there’s no need to buy sildenafil from companies not regulated by the FDA.Sudden vision loss in one or both eyes can be a sign of a serious eye problem called non-arteritic anterior ischemic optic neuropathy NAION. Read more in our editorial policy. The mechanism of action for ED pills is simple: They inhibit the PDE5 enzyme which regulates the signals responsible for the smooth muscle tissue. Contact your medical provider if you experience any side effects during treatment. It may be difficult to remain firm despite wanting to have sex. It’s available in 25 mg, 50 mg, and mg tablets and lasts up to 18 hours. Just log in to your Treated account and send them a message.