Nitroderm Tts (Glyceryl Trinitrate)

• Nitroderm Tts, containing glyceryl trinitrate, is used in the management of coronary artery disease and related conditions.
• Prophylaxis of angina pectoris: reduces the frequency of angina episodes in stable patients.
• Treatment of acute angina attacks: delivers rapid relief of chest pain during an angina episode.
• Management of chronic heart failure: lowers myocardial oxygen demand and improves symptom burden.

• Glyceryl trinitrate acts as a nitric oxide donor. After transdermal absorption, it is converted to nitric oxide, which activates guanylate cyclase in vascular smooth muscle. This raises cyclic GMP levels, causing vasodilation of veins and arteries, decreasing preload and afterload, and ultimately reducing myocardial oxygen consumption.

Nitroderm Tts may cause a range of adverse reactions.

Common Side Effects

• Headache: throbbing pain often occurring shortly after application.
• Flushing: warm sensation and reddening of the skin.
• Dizziness or light‑headedness: related to blood pressure changes.
• Hypotension: mild to moderate drop in blood pressure.
• Skin irritation at the patch site: erythema or itching.
• Tachycardia: compensatory increase in heart rate.

Serious or Rare Side Effects

• Severe hypotension: marked blood pressure fall requiring medical attention.
• Syncope: sudden loss of consciousness.
• Myocardial infarction: rare but possible in susceptible individuals.
• Severe allergic reaction: rash, swelling, or difficulty breathing.
• Worsening angina: paradoxical increase in chest pain.
• Methemoglobinemia: rare blood disorder affecting oxygen transport.

• Before prescribing Nitroderm Tts, clinicians should evaluate patient suitability and monitor for potential complications.
• Assess cardiovascular status: check blood pressure and heart rate prior to initiation.
• Review concomitant nitrate use: avoid additive hypotensive effects.
• Monitor for hypotension: advise patients to rise slowly from sitting or lying positions.
• Educate on patch removal: ensure proper disposal to prevent accidental exposure.
• Avoid heat exposure: advise against using heating pads or hot tubs while the patch is in place.
• Store at room temperature: keep in the original packaging, protect from moisture and direct sunlight.

Nitroderm Tts can interact with several drug classes, requiring careful management.

Major Interactions (Avoid)

• Phosphodiesterase‑5 inhibitors (e.g., sildenafil, tadalafil): may cause severe hypotension.
• Other organic nitrates or nitrites: risk of additive blood pressure lowering.

Moderate Interactions (Monitor Closely)

• Antihypertensive agents (e.g., ACE inhibitors, ARBs): may enhance blood pressure reduction.
• Beta‑blockers: can mask tachycardia that signals hypotension.
• Diuretics: may increase the likelihood of orthostatic hypotension.