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    Last updated: August 2021


    Prescription under medical supervision


    Therapeutic action

    • Vasodilator, antianginal


    • Short-term prophylaxis and treatment of acute angina
    • Adjunctive therapy in acute heart failure (acute pulmonary oedema)

    Forms and strengths

    • 0.5 mg sublingual tablet


    Short-term prophylaxis of acute angina

    • Adult: 0.5 to 1 mg sublingually taken 5 to 10 minutes before a precipitating event (physical exertion, stress, etc.)


    Treatment of acute angina

    • Adult: 0.5 to 1 mg sublingually, to be repeated 1 to 3 times at 3-4 minute intervals


    Adjunctive therapy in acute heart failure (acute pulmonary oedema)

    • Adult: 0.5 mg sublingually, to be repeated 1 to 2 times at 5 minute intervals if necessary. The objective is to lower the systolic pressure to 120-150 mmHg and the diastolic pressure to under 110 mmHg.


    Do not exceed 3 mg daily.


    • According to clinical response

    Contra-indications, adverse effects, precautions

    • Do not administer to patients with obstructive cardiomyopathy, hypotension, shock, severe anaemia, intracranial hypertension or neurologic injury.
    • May cause:
      • orthostatic hypotension (especially in older patients), headache, nausea, flushing of the face, haemolytic anaemia in patients with G6PD deficiency;
      • severe hypotension with risk of circulatory collapse in the event of overdose.
    • Avoid combination or use the lowest effective dose in patients taking another nitrate derivative, a vasodilator, a diuretic or an antihypertensive drug (enhances hypotensive effects), and in older patients. 
    • Do not combine with sildenafil or other drugs used for erectile dysfunction (risk of severe hypotension, syncope and acute coronary syndrome).
    • Pregnancy: not recommended (safety is not established)
    • Breast-feeding: not recommended (safety is not established)


    • Antianginal effect appears within less than 5 minutes and persists for less than 1 hour.
    • Tolerance to nitrates develops with prolonged use and can be overcome by short periods of nitrate withdrawal, and not by dose escalation.
    • Sustained-release formulations are used for the long-term management of acute angina and the treatment of heart failure.


    - Below 25 °C, preferably in airtight glass container