Sildenafil viagra and the heart. Overall health: Certain health conditions, such as diabetes, MS and some heart conditions, can exacerbate erectile dysfunction. Going easy on the alcohol: A lot of alcohol mixed with Viagra can lead to a dangerous drop in blood pressure and other side effects. Regardless of whether they are free samples or generic versions, it is imperative to confirm the security and legality of any received medications. This medication is taken with or without food an hour before sex. Medicines that you take by mouth are called oral medicines. Many men are reluctant or ashamed to talk about erectile dysfunction ED with their doctor or may be unsure whether Viagra is the best option for them.Viagra can last for about four hours or more in some people and should be taken 30 minutes to an hour before sexual activity. This article will discuss Viagra’s ability to work quickly, its current safety concerns, alternative treatments, and more. Getty Image / nito How Does Viagra Work? For men experiencing erectile dysfunction (ED), exercising regularly can be nearly as effective as ED medications, such as Viagra (sildenafil), in improving performance, according to a new meta.  · Agard is on point there, because Viagra is a prescription drug and prescription drugs aren’t taxed. Our ruling Agard said, “Potato chips, Kit Kat bars and Viagra are not taxed in Wisconsin.