Before using nitroglycerin patches,
tell your doctor and pharmacist if you are allergic to nitroglycerin patches, tablets, spray, or ointment; any other medications; adhesives; or any of the ingredients in nitroglycerin skin patches. Ask your pharmacist for a list of the ingredients.
tell your doctor if you are taking riociguat (Adempas) or if you are taking or have recently taken a phosphodiesterase inhibitor (PDE-5) such as avanafil (Stendra), sildenafil (Revatio, Viagra), tadalafil (Adcirca, Cialis), and vardenafil (Levitra, Staxyn). Your doctor will probably tell you not to use nitroglycerin patches if you are taking any of these medications.
tell your doctor and pharmacist what prescription and nonprescription medications, vitamins, nutritional supplements, and herbal products you are taking or plan to take. Be sure to mention any of the following: aspirin; beta blockers such as atenolol (Tenormin), carteolol , labetalol (Trandate), metoprolol (Lopressor), nadolol (Corgard), propranolol (Inderal), sotalol (Betapace), and timolol; calcium channel blockers such as amlodipine (Norvasc), diltiazem (Cardizem), felodipine (Plendil), isradipine (DynaCirc), nifedipine (Procardia), and verapamil (Calan, Isoptin); ergot-type medications such as bromocriptine (Parlodel), cabergoline, dihydroergotamine (D.H.E. 45, Migranal), ergoloid mesylates (Hydergine), ergonovine (Ergotrate), ergotamine (Cafergot), methylergonovine (Methergine), methysergide (Sansert), and pergolide (Permax); medications for high blood pressure, heart failure, or an irregular heartbeat. Your doctor may need to change the doses of your medications or monitor you carefully for side effects.
tell your doctor if you think you may be dehydrated, if you have recently had a heart attack, and if you have or have ever had heart failure, low blood pressure, or hypertrophic cardiomyopathy (thickening of the heart muscle).
tell your doctor if you are pregnant, plan to become pregnant, or are breastfeeding. If you become pregnant while using nitroglycerin patches, call your doctor.
if you are having surgery, including dental surgery, tell the doctor or dentist that you are using nitroglycerin patches.
ask your doctor about the safe use of alcoholic beverages while you are using nitroglycerin skin patches. Alcohol can make the side effects from nitroglycerin patches worse.
you should know that nitroglycerin patches may cause dizziness, lightheadedness, and fainting when you get up too quickly from a lying position, or at any time, especially if you have been drinking alcoholic beverages. To avoid this problem, get up slowly, resting your feet on the floor for a few minutes before standing up. Take extra precautions to avoid falling during your treatment with nitroglycerin patches.
you should know that you may experience headaches every day during your treatment with nitroglycerin patches. These headaches may be a sign that the medication is working as it should. Do not try to change the times or the way that you apply nitroglycerin patches to avoid headaches because then the medication may not work as well. Your doctor may tell you to take a pain reliever to treat your headaches.