PRECAUTIONS: Before using this drug, tell your doctor your medical history, including: allergies (especially drug allergies), head injury/internal bleeding (increased intracranial pressure), anemia, heart disease, low blood pressure. Avoid alcohol while receiving this medication since it may aggravate side effects. To avoid dizziness and lightheadedness when rising from a seated or lying position, get up slowly. This medication should be used only when clearly needed during pregnancy. Discuss the risks and benefits with your doctor. It is not known if this drug is excreted into breast milk. Consult your doctor before breast-feeding. Caution is advised if this drug is used in children. A blood disorder (methemoglobinemia) may occur rarely in small children. Caution is advised when this drug is used in the elderly.
DRUG INTERACTIONS: This drug should not be used with the following medications because very serious (possibly fatal) interactions may occur: drugs to treat impotence (e.g., sildenafil, vardenafil, tadalafil). If you are currently using any of these medications, tell your doctor or pharmacist before starting nitroglycerin. Before using this medication, tell your doctor or pharmacist of all prescription and nonprescription/herbal products you may use, especially of: heparin, drugs for high blood pressure (e.g., ACE inhibitors such as fosinopril or lisinopril, alpha blockers such as prazosin or doxazosin, beta-blockers such as propranolol), antipsychotics for mental conditions (e.g., chlorpromazine, haloperidol), other nitrate drugs such as isosorbide, "dopamine-like" drugs such as bromocriptine or cabergoline. Do not start or stop any medicine without doctor or pharmacist approval.
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