If you have insurance, you may be able to use your insurance to purchase your drugs online, but your cost will probably be exactly the same at any pharmacy since the cost is a co-pay that is determined by your insurer’s formulary and tier pricing. You can protect yourself and your family by being cautious when buying medicine online. You can take this medicine with or without food 30 minutes before sex, depending on the dose. The most common side effects of VIAGRA: headache; flushing; upset stomach; abnormal vision, such as changes in color vision such as having a blue color tinge and blurred vision; stuffy or runny nose; back pain; muscle pain; nausea; dizziness; rash. But the medicines they sell could have been made anywhere, with little care or concern for safety and effectiveness.DON’T BE FOOLED BY COUNTERFEIT VIAGRA. VIAGRA is one of the most counterfeited drugs in the world. Counterfeits aren’t just a cheap knockoff of a proven product; they’re . Can you buy legitimate and legal Viagra online? Counterfeit Viagra is known to contain amphetamines, toxic chemicals, the wrong dose of active ingredients, and even blue . Generic Viagra (sildenafil) is an alternative to the branded Viagra drug that can be used for treating erectile dysfunction (ED). It’s now sold by many manufacturers, including online.