Nitroglycerin ointment is a prescription medication used to treat and prevent chest pain (angina pectoris) caused by reduced blood flow to the heart. Here's a breakdown of its specific use:
Medical Use:
- While various forms of nitroglycerin exist, the ointment is primarily intended for:
- Preventing angina attacks: Applied to the skin as a preventive measure to widen blood vessels and improve blood flow to the heart, potentially reducing the likelihood of chest pain.
- It's not a first-line treatment for ongoing chest pain: Unlike sublingual tablets or sprays, the ointment is not meant for immediate pain relief during an angina attack.
Mechanism of Action:
- Similar to other nitroglycerin medications, the ointment works as a vasodilator.
- Upon application and absorption through the skin, it relaxes and widens blood vessels, particularly arteries.
- This increased blood vessel diameter improves blood flow to the heart, reducing the workload and potentially preventing angina episodes.
Dosage and Administration:
- A doctor determines the specific dosage and application area based on individual needs.
- Typical instructions:
- Apply a pea-sized amount to designated areas like the chest, upper arms, back, or shoulders.
- Wash hands thoroughly after application.
- Important:
- Do not apply to broken or irritated skin.
- Avoid contact with eyes or mucous membranes.
Important Information:
- Prescription medication: Requires a doctor's prescription and should only be used under their guidance.
- Potential side effects: Similar to other nitroglycerin forms, common side effects include headache, dizziness, and flushing (feeling of warmth in the face).
- Tolerance: Regular use can lead to tolerance, meaning higher doses might be required over time for the same effect.