NITROGLYCERIN

Nitroglycerin is a stabilized sublingual compressed nitroglycerin tablet that contains 0.3 mg, 0.4 mg , or 0.6 mg nitroglycerin; as well as calcium stearate powder, colloidal silicon dioxide, hydrogenated vegetable oil, lactose monohydrate, and pregelatinized starch. Nitroglycerin, an organic nitrate, is a vasodilating agent. The chemical name for nitroglycerin is 1, 2, 3 propanetriol trinitrate and the chemical structure is: Molecular weight: 227.09

Nitroglycerin is indicated for the acute relief of an attack or acute prophylaxis of angina pectoris due to coronary artery disease. Nitroglycerin is a nitrate vasodilator indicated for relief of an attack or prophylaxis of angina pectoris due to coronary artery disease. (1)

Administer one tablet under the tongue or in the buccal pouch at the first sign of an acute anginal attack. Allow tablet to dissolve without swallowing. One additional tablet may be administered every 5 minutes until relief is obtained. No more than three tablets are recommended within a 15-minute period. If the pain persists after a total of 3 tablets in a 15-minute period, or if the pain is different than is typically experienced, seek prompt medical attention. Nitroglycerin may be used prophylactically 5 to 10 minutes prior to engaging in activities that might precipitate an acute attack. For patients with xerostomia, a small sip of water prior to placing the tablet under the tongue may help maintain mucosal hydration and aid dissolution of the tablet. Administer nitroglycerin at rest, preferably in the sittingposition. • At the onset of an attack, administer one tablet under the tongue or buccal pouch. One additional tablet may be administered every 5 minutes as needed. No more than 3 total tablets are recommended within a 15 minute period. (2) • If chest pain persists after three tablets, seek prompt medical attention. (2) • May be used prophylactically 5 to 10 minutes prior to engaging in activities that might precipitate an acute attack. (2)

• Use of phosphodiesterase type 5 (PDE-5) inhibitors, such as avanafil, sildenafil, tadalafil, or vardenafil, or soluble guanylate cyclase (sGC) stimulators. (4.1, 7.1) • Severe anemia (4.2) • Increased intracranial pressure (4.3) • Hypersensitivity to nitroglycerin or to other nitrates or nitrites or any excipient (4.4) • Circulatory failure and shock (4.5) 4.1 PDE-5-Inhibitors and sGC-Stimulators Do not use nitroglycerin in patients who are taking PDE-5 Inhibitors, such as avanafil, sildenafil, tadalafil, vardenafil hydrochloride. Concomitant use can cause severe hypotension, syncope, or myocardial ischemia [see Drug Interactions (7.1)]. Do not use nitroglycerin in patients who are taking the soluble guanylate cyclase stimulators, such as riociguat. Concomitant use can cause hypotension. 4.2 Severe Anemia Nitroglycerin is contraindicated in patients with severe anemia (large doses of nitroglycerin may cause oxidation of hemoglobin to methemoglobin and could exacerbate anemia). 4.3 Increased Intracranial Pressure Nitroglycerin may precipitate or aggravate increased intracranial pressure and thus should not be used in patients with possible increased intracranial pressure (e.g., cerebral hemorrhage or traumatic brain injury). 4.4 Hypersensitivity Nitroglycerin is contraindicated in patients who are allergic to nitroglycerin, other nitrates or nitrites or any excipient. 4.5 Circulatory Failure and Shock Nitroglycerin is contraindicated in patients with acute circulatory failure or shock.

The following adverse reactions are discussed in more detail elsewhere in the label: • Hypotension [see Warnings and Precautions (5.2)] • Headache [see Warnings and Precautions (5.4)] • Hypersensitivity [see Contraindications (4.4)] Vertigo, dizziness, weakness, palpitation, and other manifestations of postural hypotension may develop occasionally, particularly in erect, immobile patients. Marked sensitivity to the hypotensive effects of nitrates (manifested by nausea, vomiting, weakness, diaphoresis, pallor, and collapse) may occur at therapeutic doses. Syncope due to nitrate vasodilatation has been reported. Flushing, drug rash, and exfoliative dermatitis have been reported in patients receiving nitrate therapy. Most common adverse reactions occurring at a frequency greater than 2% are headache, dizziness and paresthesia. (6) To report SUSPECTED ADVERSE REACTIONS, contact Dr. Reddy’s Laboratories Inc., at 1-888-375-3784 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch.

Ergotamine: increased bioavailability of ergotamine. Avoid concomitant use. (7.2) Ergotamine: increased bioavailability of ergotamine. Avoid concomitant use. (7.2) 7.1 PDE-5-Inhibitors and sGC-Stimulators Nitroglycerin is contraindicated in patients who are using a selective inhibitor of cyclic guanosine monophosphate (cGMP)-specific phosphodiesterase type 5 (PDE-5). PDE-5-Inhibitors such as avanafil, sildenafil, vardenafil, and tadalafil have been shown to potentiate the hypotensive effects of organic nitrates. Nitroglycerin is contraindicated in patients who are taking soluble guanylate cyclase (sGC) stimulators. Concomitant use can cause hypotension. The time course and dose dependence of these interactions have not been studied, and use within a few days of one another is not recommended. Appropriate supportive care for the severe hypotension has not been studied, but it seems reasonable to treat this as a nitrate overdose, with elevation of the extremities and with central volume expansion. 7.2 Ergotamine Oral administration of nitroglycerin markedly decreases the first-pass metabolism of dihydroergotamine and subsequently increases its oral bioavailability. Ergotamine is known to precipitate angina pectoris.Therefore, patients receiving sublingual nitroglycerin should avoid ergotamine and related drugs or be monitored for symptoms of ergotism if this is not possible.