Differences. Oral medications are a simple and effective way to treat erectile dysfunction (ED). The most common erectile dysfunction pill is Viagra, and the next most common is .If approved, the provider will issue a prescription. These medicines are called PDE5 inhibitors. Erectile dysfunction can be caused by a variety of factors , including age, cardiovascular problems, diabetes, and other conditions that affect nerve function or blood flow. Taking generic ED medications is an effective way to save money without sacrificing quality. It may be difficult to remain firm despite wanting to have sex.Ask your doctor. Q&A. Drug Images. What is Viagra? If you have erectile dysfunction (ED), your doctor may recommend that you take Viagra. It’s a prescription drug that’s used in . Differences. Oral medications are a simple and effective way to treat erectile dysfunction (ED). The most common erectile dysfunction pill is Viagra, and the next most common is . Although erectile dysfunction (ED) may be an upsetting diagnosis for some, many people find their condition is treatable with Viagra — sometimes called the “little blue pill” — and .Both medications are generic now and can be found at discounted rates, making them more accessible to the public than ever before. Oral medicines for ED usually work well and cause few side effects. Summary Cialis and Viagra are both pills for treating erectile dysfunction. Because they are the same class of medications, they have similar side effects and effectiveness. This, in turn, leads to more nitric oxide in the body. Insurance: If you plan to use insurance, make sure the online provider accepts it.