Prescription Options

Noristerat Contraceptive Injection

November 10, 2018


The Noristerat injection is a reversible, progestin-only procedure of prescription birth control. It is not obtainable in the United States, but It’s common in the Uk, Europe, Africa, and Central and Latin America. Noristerat is a contraceptive injection which contains the progestin hormone, norethisterone enantate. The effectiveness, advantages, and pitfalls of Noristerat are very similar to Depo Provera but its duration of action is shorter (Noristerat lasts for 8 months as compared to Depo Provera( that lasts for 12 weeks).

Noristerat doesn’t offer any protection against sexually transmitted diseases.


Noristerat is a contraceptive that is injected into the muscle of the buttock. The injection is usually given during the first one to five days of your monthly period. Noristerat will continuously release progestin in your blood over a period of eight weeks (two months).

After eight weeks, you can just have an additional Noristerat injection.

Who Should Use Noristerat

Noristerat is meant to be a short-term method of contraception. It’s mainly used by women:

  • Whose spouses are having a vasectomy (the Noristerat injection provides pregnancy protection until the vasectomy becomes successful ).  
  • Who are being immunized against rubella.

Noristerat doesn’t have any estrogen, therefore this injection may be a fantastic short-term birth control method if you can’t use estrogen-based contraceptives. It is also a contraceptive option if you’re breastfeeding.

The Way It Works

The norethisterone protects against pregnancy mainly by preventing ovulation. Towards the end of the eight weeks, the Noristerat works mostly by thickening your cervical mucus. The hormone may also thin the lining of the uterus.

After the Injection

For the eight weeks that you are utilizing Noristerat, it’s important for you to look at your nipples and breasts once a month for any adjustments (such as dimpling of the skin or lumps).

If you need to have blood work done, make sure your doctor knows that you are using Noristerat. This is only because Noristerat may affect some of your outcomes. Your physician also has to bear in mind you’ve had the Noristerat injection if you are going to undergo any surgery during the eight-week time period. Remember that as soon as you stop carrying Noristerat, it can take up to a month more (than other hormonal methods) for you to start ovulating again and recover your fertility.

Side Effects

Not every girl will have unwanted effects from this injection. The most commonly reported Noristerat side effects are:

  • Spotting or breakthrough bleeding
  • Delayed period
  • Irregular or heavier bleeding
  • Weight benefit
  • Headaches
  • Dizziness and/or nausea
  • Skin reactions (like pain, rash and/or itch at the injection site


Noristerat is 97% to 99.7% effective. This means that with average usage, 3 out of every 100 women who use Noristerat become pregnant in one year. With perfect use, less than 1 out of every 100 women who use Noristerat will become pregnant in one year.

If you receive the Noristerat injection during the first five days of the period, then it is effective immediately and no back-up birth control is needed.

There are particular drugs that can lower the efficacy of Noristerat.

Noristerat Is Also called:

Doryxas, Norethisterone injectable, Norigest, Nur-Isterate, Syngestal, and Unidepo