Heather ®
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0.35mg
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Reviewed on August 20, 2025. by
Dr Alexandra Cristina Cowell
Writer & Clinical Content Reviewer
Next review due on
August 20, 2028.
Dr Alexandra Cristina Cowell

Last updated on Sep 05, 2025.

Reduces or stops menstrual bleeding to ease endometriosis.

Heather is a progestin-only birth control pill that can be prescribed off-label for endometriosis. This means that while it’s thought to be a safe and effective way to manage endometriosis symptoms, it hasn’t been officially licensed for this purpose.

Price checker
0.35mg
$79.95
  • Prices include:
    Express shipping

    2-5 day shipping by secure courier

  • Consultation + Access to our clinicians

    Ask our experts anything you like, any time you want.

  • Total
    $79.95
    Save $0.00 each order
Heather Norethindrone

What is Heather?

Heather is a progestin-only birth control pill, also known as a mini-pill. You’ll take it every day without a break to reduce menstrual bleeding (or stop it all together). This should help relieve endometriosis symptoms like painful periods or heavy bleeding.

How does Heather work?

Heather contains a man-made version of the natural sex hormone progesterone, which is known as a progestin. This limits the growth of your uterine lining – including the excess endometrial tissue that characterizes endometriosis.

This should help to reduce menstrual bleeding, relieve the pain and discomfort caused by endometriosis, and help stop new endometrial tissue from forming outside of the uterus.[1]

How do Heather doses work?

Heather comes in one dose, a 0.35 mg tablet. You’ll take this tablet around the same time every day without breaks to manage your endometriosis symptoms.

What is Heather’s active ingredient?

Heather’s active ingredient is called norethindrone (also known as norethisterone). It’s licensed as a progestin-only birth control pill that prevents pregnancy by stopping ovulation in about half of menstrual cycles, thickening your cervical mucus to stop sperm passing through, and thinning your uterine lining to prevent an egg implanting.

Because norethindrone helps to thin your uterine lining, it can also relieve pain and heavy menstrual bleeding associated with endometriosis.

Treated trusted source:

  1. Casper, R.F. (2017). Progestin-only pills may be a better first-line treatment for endometriosis than combined estrogen-progestin contraceptive pills. Fertility and Sterility. 107(3). pp. 533-536.
Dr Alexandra Cristina Cowell
This page was medically reviewed by Dr Alexandra Cristina Cowell on August 20, 2025. Next review due on August 20, 2028.

How we source info.

When we present you with stats, data, opinion or a consensus, we’ll tell you where this came from. And we’ll only present data as clinically reliable if it’s come from a reputable source, such as a state or government-funded health body, a peer-reviewed medical journal, or a recognised analytics or data body. Read more in our editorial policy.

Heather Norethindrone

How to take Heather

You’ll take Heather every day to manage symptoms of endometriosis. For the most effective pregnancy protection, it’s important to take your pill at the same time every day.

You have a couple of options when it comes to starting Heather.

  • If you take your first tablet on the first day of your period, you’ll be protected from pregnancy right away.
  • If you take your first tablet on any other day, you’ll need to use a back-up method of contraception (like condoms) for the first week of treatment.

Your medication should come with a label strip with the days of the week on it. Find the strip that starts with the first day of your period, and place it on the tablet blister over the area that lists the days of the week. This helps you to remember to take your tablet every day, and makes it easier to recognise if you’ve missed a tablet.

Dr Alexandra Cristina Cowell
This page was medically reviewed by Dr Alexandra Cristina Cowell on August 20, 2025. Next review due on August 20, 2028.

How we source info.

When we present you with stats, data, opinion or a consensus, we’ll tell you where this came from. And we’ll only present data as clinically reliable if it’s come from a reputable source, such as a state or government-funded health body, a peer-reviewed medical journal, or a recognised analytics or data body. Read more in our editorial policy.

Heather Norethindrone

Heather isn’t suitable for everyone, and there are some things that you need to be aware of when taking it.

Here’s all the official info on it. If anything is unclear, let our clinician know, and they can talk with you about it.

Heather Norethindrone

Heather: FAQ

Have something specific you want to know? Search our info below, or ask our experts a question if you can’t find what you’re looking for.

How effective is Heather?

Answer:
Norethindrone, the active ingredient in Heather, has proven to be an effective treatment for the management of endometriosis.

A small study of six people with endometriosis found that after six months of treatment with norethindrone, endometrial lesions outside the uterus had decreased in volume by about 37.2%. And, after nine and 12 months of treatment, the reduction rate of the endometrial lesions were similar to those after six months – meaning Heather should be an effective long-term treatment for endometriosis.[2]

Before the study, all six individuals reported painful periods. After three months, five of the six individuals reported that their periods had stopped and they experienced no pain, with the sixth individual reporting the same after six months.[2]

But it’s important to note this study did use a higher dose of Norethindrone than Heather. Heather contains 0.35 mg of Norethindrone, while this study administered 5 mg.

Are there any Heather alternatives?

Answer:
Yes, you have other options if Heather isn’t the right treatment to manage your endometriosis. The first-line treatment for endometriosis symptoms is usually pain-management medicine like NSAIDs (aspirin or ibuprofen) or acetaminophen. But if these don’t help manage your symptoms, your physician may be able to prescribe a stronger painkiller.

But if painkillers aren’t enough to manage your endometriosis symptoms, and Heather isn’t right for you, another progestin-only birth control pill might be a more suitable option. Medroxyprogesterone is a different type of progestin-only birth control that’s sold under the brand name Provera. You’ll usually take 10 mg of medroxyprogesterone each day for around 3 months to help manage endometriosis symptoms.[1]

Do I need a prescription for Heather?

Answer:
Yes. Heather is a prescription-only treatment, and a healthcare professional will need to make sure it’s right for you before you take it.

How long does it take Heather to work?

Answer:
Heather is a long-term treatment for endometriosis. It can take between three and six months to tell whether birth control is helping with your symptoms – but you may start to notice improvements earlier than this.[3]

What should I do if I make a mistake when taking Heather?

Answer:
If it’s been less than three hours since you’d normally take Heather, you can take your tablet as soon as you remember and you’ll still be protected from pregnancy.

If it’s been more than three hours, or you’ve missed one or more tablets, you should still take your missed pill as soon as you remember. However, you’ll need to use back up contraception for the next 48 hours if you’re sexually active.

Are there any Heather side effects?

Answer:
Like any drug you use, Heather can cause some side effects. The most common of these side effects is spotting or bleeding in between when you’d normally have your period.

Less common Heather side effects may include:

  • Headache

  • Tender breasts

  • Nausea

  • Dizziness

Can I get Heather through private health insurance?

Answer:
Because Heather is prescribed off-label for endometriosis, it’s unlikely to be covered by health insurance providers for this purpose. But many health insurance plans do cover birth control at no additional cost – so it’s best to check which birth control options are covered by your health insurance plan.

If you can’t get Heather through your health insurance for Endometriosis, you should still be able to get it from an online pharmacy service if it’s a suitable treatment for you.

Treated trusted source:

  1. NHS UK. (2023). How and when to take medroxyprogesterone tablets.
  2. Taniguchu, F. et al. (2017). Efficacy of Norethisterone in Patients with Ovarian Endometrioma. Yonago Acta Medica. 60(3). pp. 182-185.
  3. Martin, K. Kay, C. (2023). Birth control for endometriosis. Medical News Today. February 16.

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