Hormonal contraceptive (progestogen-only injectable)
Last reviewed June 2026
Who is this for?
Norethisterone enantate is a long-acting hormonal contraceptive injection that works by preventing your ovaries from releasing eggs and thickening the mucus in your cervix so sperm cannot reach the egg. It is commonly known by the brand name Noristerat in Nigeria.
Binds to progesterone receptors in the hypothalamus and pituitary gland, suppressing gonadotropin-releasing hormone (GnRH) and inhibiting follicle-stimulating hormone (FSH) and luteinizing hormone (LH) secretion, thereby preventing ovulation and thickening cervical mucus to impede sperm transport.
Prescription Required
You need a doctor's prescription to buy this drug.
Explore this drug
This is not a tablet — it is an injection (Noristerat 200 mg/mL) given deep into the buttock muscle by a trained nurse or doctor. The first injection is given within the first 5 days of your menstrual period. It is repeated every 2 months (8 weeks) for the first two doses, then every 12 weeks after that. Always go to a clinic or hospital to receive it.
If you miss your scheduled injection date, go to your clinic as soon as possible. If it has been more than 2 weeks past your due date, use condoms or avoid intercourse until you get the injection, and your healthcare provider may ask you to take a pregnancy test first before giving the next dose.
Always get your Noristerat injection from a licensed clinic, hospital, or pharmacy — never from unregistered vendors or roadside sellers. Keep track of your injection dates so you do not miss a dose and risk unplanned pregnancy. If your periods stop completely for a long time or you notice unusual symptoms, visit your healthcare provider for a check-up.
Some drugs used for epilepsy (like carbamazepine and phenytoin) and tuberculosis medicine (rifampicin) can reduce its effectiveness, making pregnancy more likely. Some herbal remedies and traditional medicines may also interfere — tell your doctor about anything you are taking. Alcohol does not directly affect the injection, but heavy drinking can worsen side effects like mood changes.
Check your specific combination
Is it safe to take Norethisterone with your other drugs?
Do not use Noristerat if you are pregnant or suspect you might be pregnant; if you are breastfeeding, consult your doctor as small amounts may pass into breast milk, though it is generally considered safe after 6 weeks postpartum.
This injection is stored at the clinic or pharmacy. It should be kept at room temperature, away from direct sunlight and extreme heat. Do not freeze it. Keep out of the reach of children.
For information only — not medical advice. Always talk to a doctor or pharmacist before changing your medication.
Names this drug is sold under — especially in Nigerian and West African pharmacies
No brand names recorded for Norethisterone enantate yet.
Counterfeit Drug Warning
Fake drugs are a serious problem in Nigeria. Always buy from a registered pharmacy. If the packaging looks different from what is described above, do not use it.
Dispensing Norethisterone enantate?
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