Nitroglycerin may also be used for purposes not listed in this medication guide.You should not use nitroglycerin if you are also using medicine to treat You should not use nitroglycerin if you are allergic to it.Tell your doctor if you are pregnant or breastfeeding.Follow all directions on your prescription label and read all medication guides or instruction sheets. Viagra ( sildenafil) relaxes muscles found in the walls of blood vessels and increases blood flow to particular areas of the body. Phosphodiesterase-5 inhibitors (such as Viagra or Cialis used for the treatment of erectile dysfunction) taken along with nitroglycerin can lead to extreme relaxation of blood vessels and, in some patients, to very low blood pressure. Nitroglycerin can interact with medications for erectile dysfunction. A study was conducted to assess the degree of interaction between nitroglycerin and tadalafil, should nitroglycerin be required in an emergency situation after tadalafil was taken. On average, This drop in blood pressure also occurs with other medications used to treat ED, such as Ciails (tadalafil) and Levitra (vardenafil). Do not stop taking nitroglycerin. Do not take erectile dysfunction medicine (Viagra, Cialis, Levitra, Stendra, Staxyn, sildenafil, avanafil, tadalafil, vardenafil) while you are using nitroglycerin topical.Using erectile dysfunction medicine with nitroglycerin can cause a sudden and serious decrease in blood pressure. This makes it easier to get an erection and stay hard during sexual activity.As part of this process, Viagra affects the muscle tissue that controls the diameter of your blood vessels. Before taking this medicine. Avoid getting up too fast from a sitting or lying position, or you may feel dizzy.Drinking alcohol can increase certain side effects such as dizziness, drowsiness, feeling light-headed, or fainting.a light-headed feeling, like you might pass out; orheart attack symptoms--chest pain or pressure, pain spreading to your jaw or shoulder, Nitroglycerin can cause severe headaches. What does this medication do? These medications are primarily used to treat systemic hypertension.Many of these medications are sold under specific brand names, rather than under their generic names. Do not use more just because you do not feel a burning or stinging.This medicine can affect the results of certain medical tests. Use the medicine exactly as directed.If you use too much nitroglycerin, it might not work as well in controlling your symptoms.Nitroglycerin is usually taken at the first sign of chest pain. Do not rinse or spit nitroglycerin powder for 5 minutes after using the medicine. Another brand of sildenafil is Revatio, which is used to treat pulmonary arterial hypertension and improve exercise capacity in men and women. It may be given to you for other reasons. This includes prescription and over-the-counter medicines, Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.Copyright 1996-2018 Cerner Multum, Inc. Hence, nitroglycerin use in conjunction with these medications is … It is also used just before activities that may cause episodes of angina in order to prevent the angina from occurring. Do not apply two doses at one time.Seek emergency medical attention or call the Poison Help line at 1-800-222-1222. You should not use nitroglycerin if you are allergic to it. Available for Android and iOS devices. When you take Viagra, your blood vessels dilate. You may use nitroglycerin sublingual within 5 to 10 minutes before an activity you think might cause chest pain. You may use nitroglycerin sublingual within 5 to 10 minutes before an activity you think might cause chest pain. Make sure you read the packaging of your medication to check if it contains any active ingredients that could interact with Viagra.Other cardiovascular medications, such as riociguat, alpha-blockers and other medications used to treat hypertension also have the potential to interact with Viagra to cause hypotension.Recreational drugs containing nitrates, such as amyl nitrate and butyl nitrate “poppers,” can also interact with Viagra, Cialis and Levitra.