Why is a nitroglycerin tablet sublingually in a patient with angina pectoris?

Why is a nitroglycerin tablet sublingually in a patient with angina pectoris?

— — Question: How does nitroglycerin work, when is it used, and why is it placed under the tongue? Answer: Nitroglycerin is used because it dilates the vessels and therefore lowers the blood pressure. But most importantly, it dilates the coronary arteries, which causes angina.

How do you use nitroglycerin sublingual tablets?

For sublingual dosage form (tablets): Adults—1 tablet placed under the tongue or between the cheek and gum at the first sign of an angina attack. 1 tablet may be used every 5 minutes as needed, for up to 15 minutes. Do not take more than 3 tablets in 15 minutes.

When should you take nitroglycerin sublingual?

Adults—1 tablet placed under the tongue or between the cheek and gum at the first sign of an angina attack. 1 tablet may be used every 5 minutes as needed, for up to 15 minutes. Do not take more than 3 tablets in 15 minutes. To prevent angina from exercise or stress, use 1 tablet 5 to 10 minutes before the activity.

How sublingual nitrates reduce angina?

Sublingual nitrates are the drug of choice for management of angina in acute and emergency settings. They relieve the symptoms of angina by venodilatation of capacitance vessels and preferential dilatation of coronaries, thus reducing the myocardial oxygen demand [1,15].

What happens when you take nitroglycerin?

Nitroglycerin works by relaxing the smooth muscle and blood vessels in your body. This increases the amount of blood and oxygen that reaches your heart. In turn, your heart doesn’t work as hard. This reduces chest pain.

What is the most common side effect of nitroglycerin?

The most common side effect of long-acting nitroglycerin is a headache, but this side effect decreases with medication use. Although people only apply rectal ointment to the anus, they may still experience headaches and dizziness.

How long does sublingual nitro last?

3 to 5 months
According to a 1974 study, the shelf life of sublingual nitroglycerin tablets is 3 to 5 months1 once the original bottle is opened.

Why do nitrates relieve angina?

Essentially, nitrates dilate – that is, widen or relax – the arteries and the veins not only in the heart but also elsewhere in the body. By dilating the blood vessels of the heart, nitrates can reduce the stress on the heart by improving blood flow to the heart muscle. This will relieve angina symptoms.

How do nitrates work to treat angina?

Nitrates improve blood flow by relaxing and dilating (expanding) veins and arteries, including the coronary arteries. They reduce the amount of blood returning to the heart, which may be helpful for patients with heart failure.

What is nitroglycerin side effects?

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• Bloating or swelling of the face, arms, hands, lower legs, or feet.
• burning, crawling, itching, numbness, prickling, “pins and needles”, or tingling feelings.
• difficult or labored breathing.
• feeling faint, dizzy, or lightheadedness.
• feeling of warmth or heat.

When not to give nitroglycerin?

When should you not give Nitro? ABSOLUTE: Discontinue nitroglycerin administration or do not administer nitroglycerin to patients who: Have a known sensitivity to nitrate medications. Have taken erectile dysfunction medications within the past 24 hours, such as Viagra, Cialis, Levitra, Stendra, Staxyn, sildenafil, avanafil, tadalafil or vardenafil.

When should you take nitroglycerin?

Brisk walking

When to take Nitro?

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What is the maximum dose of nitroglycerin?

The maximum daily dosage is 75 mg (12.5 cm as squeezed from the tube). The ointment is applied in a thin layer covering approximately 2 to 3 inches of skin, but should not be massaged into the skin.