What is a good/cheaper replacement to viagra (sildenafil)?

GoodRx: Check out www.goodrx.com - depending on your zip code and what pharmacies you have around you, you may be able to find viagra fairly cheap with the coupons/discounts offered there. For example, near me, one can get 10 tablets of 50mg viagra for $15.40, as opposed to the usual retail price of $346-$644 for the same dosage/amount. This wasn't exactly your question, but I thought it might help.

Buyer beware: There are a multitude of "supplement" products that are highly advertised & promoted by supposed experts in sexual health. Please understand that the FDA is prohibited by law from regulating these products. They can ban them from the market if they kill/injure people but this is an after thought. Such products are not required to prove effectiveness.

Viagra : So the medication in viagra is also used for pulmonary hypertension at a lower dose and is named Revatio. For some reason, it costs less than viagra. Ask your doctor about it.