Common ones include: Flushing of the skin. From Mayo Clinic to your inbox Sign up for free and stay up to date on research advancements, health tips, current health topics, and expertise on managing health. These medicines all work well for ED. These include a heart attack, stroke or a serious heart rhythm disorder in the past six months. Medicines that you take by mouth are called oral medicines. As with sildenafil, a high-fat meal or alcohol keep the body from absorbing it as quickly. Medicines that block an enzyme called CYP3A4. · There’s a Free, Low-Risk Alternative to Viagra, Study Shows. Regular exercise sessions can be as effective as popping Viagra pills when it comes to dealing . Products and services Erectile dysfunction: Viagra and other oral medications By Mayo Clinic Staff Medicines that you take by mouth are called oral . Consumer Reports Best Buy Drugs shares how you might be able to get generic Viagra, known as sildenafil, at a much lower price.