Before you take Viagra or one of the others, tell your doctor: But there are other situations that may make these medications unsafe as well. What Precautions Should I Take?Īgain, do not use these ED medications if you take nitrates, such as nitroglycerin or a similar medicine, for chest pain. But these medications work the same basic way, so you’re likely to have similar results. You may find that one works better for your schedule or that there are differences in the side effects for you. Stendra can start doing its thing in as little as 15 minutes, and its effects last up to 6 hours. Viagra takes around 30 minutes to become effective and lasts about 4 hours.Ĭialis lasts much longer - up to 36 hours in some cases. It contains the same active ingredient as Levitra and can begin working in about 15 minutes. Levitra takes about 30 minutes to start working and the effects last a little longer than Viagra, about 5 hours.

However, there are subtle differences in how long they stay effective and how quickly they begin to work. These medications all work similarly to each other. The combination can cause dangerously low blood pressure. They are:Ĭaution: Do not use these ED medications if you take nitrates, such as nitroglycerin or a similar medicine, for chest pain. What Medications Are Available?Īll of these work by relaxing your muscles and boosting blood flow to your penis, making erections easier to get and maintain. The FDA has approved several prescription drugs you take orally to treat ED. But others find they may need medication to get and keep an erection. Some men with erectile dysfunction, or ED, find they can return to an active sex life by treating an underlying condition, such as high blood pressure or diabetes, or with counseling and lifestyle changes.

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