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Concept
Ergometrine
Summary
Ergometrine, also known as ergonovine and sold under the brand names Ergotrate, Ergostat, and Syntometrine among others, is a medication used to cause contractions of the uterus to treat heavy vaginal bleeding after childbirth. It can be used either by mouth, by injection into a muscle, or injection into a vein. It begins working within 15 minutes when taken by mouth and is faster in onset when used by injection. Effects last between 45 and 180 minutes.
Common side effect include high blood pressure, vomiting, seizures, headache, and low blood pressure. Other serious side effects include ergotism. It was originally made from the rye ergot fungus but can also be made from lysergic acid. Ergometrine is regulated because it can be used to make lysergic acid diethylamide (LSD).
Ergometrine was discovered in 1932. It is on the World Health Organization's List of Essential Medicines.
Ergometrine has a medical use in obstetrics to facilitate delivery of the placenta and to prevent bleeding after childbirth by causing smooth muscle tissue in the blood vessel walls to narrow, thereby reducing blood flow. It is usually combined with oxytocin (Syntocinon) as syntometrine.
It can induce spasm of the coronary arteries. It is used to diagnose variant (Prinzmetal's) angina.
Possible side effects include nausea, vomiting, abdominal pain, diarrhea, headache, dizziness, tinnitus, chest pain, palpitation, bradycardia, transient hypertension and other cardiac arrhythmias, dyspnea, rashes, and shock. An overdose produces a characteristic poisoning, ergotism or "St. Anthony's fire": prolonged vasospasm resulting in gangrene and amputations; hallucinations and dementia; and abortions.
Gastrointestinal disturbances such as diarrhea, nausea, and vomiting, are common. The drug is contraindicated in pregnancy, vascular disease, and psychosis.
While ergometrine acts at α-adrenergic, dopaminergic, and serotonin receptors (the 5-HT2 receptor), it exerts on the uterus (and other smooth muscles) a powerful stimulant effect not clearly associated with a specific receptor type.
Official source
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