Errin birth control prescription available online 

Errin (norethisterone) oral contraceptive birth control pills are highly effective for pregnancy prevention. Get a new prescription or refill of Errin from a caring, board-certified doctor online.*

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Convenient online Errin prescriptions

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*Prescriptions are provided at the doctor’s discretion. Learn more about our controlled substances policy and how you can save up to 80% with our prescription discount card.

About Errin birth control

Errin is considered a progestin-only oral contraceptive (mini pill), which helps regulate ovulation and prevent pregnancy. Like other mini pills, Errin does not protect against sexually transmitted diseases or infections.

Errin is used to prevent pregnancy. Errin is available only by prescription. It is available in a generic formulation as norethisterone, as well as under different brand names.

Errin may be prescribed as an oral tablet. It’s always important to follow the specific instructions on your prescription, as they can vary based on the formulation and dosage prescribed.

If you're prescribed Errin, be sure to complete the full course of the birth control unless your doctor specifically tells you to stop. If you don’t complete your prescription, the birth control pills may not work as effectively to prevent pregnancy.

Errin birth control uses

There several FDA-approved uses for Errin birth control pills; it may also be used off-label to treat other conditions. Your online doctor may prescribe it for any of the following common reasons. It’s also possible that your healthcare provider may prescribe it for other reasons not listed here. If you have questions about why a medication is prescribed, ask your online doctor or pharmacist.

  • Pregnancy prevention (birth control)

    Errin is FDA-approved to prevent pregnancy. It works by making vaginal mucus thicker and preventing fertilization. Errin also prevents ovulation during the menstrual cycle.

    Errin may also be prescribed to treat menstrual disorders, abnormal vaginal bleeding caused by a hormonal imbalance, and endometriosis in women interested in taking birth control pills.

Errin side effects

  • Errin birth control side effects

    The side effects associated with taking Errin contraceptive pills are typically mild. Most Errin side effects are associated with breakthrough bleeding. Common side effects of Errin may include:

    • Breakthrough bleeding or spotting

    • Breast tenderness or pain

    • Stomach pain, nausea, and bloating

    Other side effects, which are less common but might be more severe, could include:

    • Allergic reactions

    • Sudden vision loss

    • Signs of blood clots (shortness of breath, swelling, sudden or severe pain)

    Tell your doctor if you notice any of these side effects, or if you develop any other new or concerning symptoms. The use of Errin in children is not recommended before menarche.

How to take Errin contraceptive pills

Your pharmacist will provide you with instructions on how to take your Errin birth control prescription. Be sure to read your prescription label and follow the instructions. Call your doctor or pharmacy if you have any questions.

Errin can come in different forms and doses, so be sure to follow the specific instructions on your prescription. You should take your first birth control pill on the first day of your period or the first Sunday after your period begins.

You'll need to use a back-up birth control method, such as condoms or spermicide, to prevent sexually transmitted diseases or infections. You may also need to use back-up birth control if you're sick with vomiting or diarrhea, or if you miss pills by more than three hours.

If you take this medication for a menstrual disorder, you may only take the medication for 5–10 days. Vaginal bleeding will occur 3–7 days after your last birth control dose.

What to avoid while taking Errin (interactions)

Errin has 237 drug interactions. Don’t change what you are taking without checking with your doctor or pharmacist. That includes other medications or supplements, as well as over-the-counter drugs. 

Possible drug interactions with Errin include:

  • St. John's Wort

  • HIV/AIDs medicine

  • Seizure medications

  • Certain antibiotic or antifungal medications

  • Medicine used to treat tuberculosis

It is safe to drink alcohol while taking this medication. Talk to your doctor before consuming grapefruit or grapefruit juice. Grapefruit may increase the plasma concentrations of Errin.

You should discontinue oral contraceptive therapy if you're pregnant or planning to become pregnant.

Contraceptive alternatives to Errin

If your healthcare provider prefers to put you on another treatment altogether, they may suggest other progestin-only oral contraceptives or a combined oral contraceptive in another drug class. Here are some common doctor-recommended alternatives based on your health issue:

Errin prescription FAQs

  • How much does Errin cost?

    Depending on your pharmacy, Errin (0.35 mg) costs around $43 for 84 tablets without insurance. Fortunately, many health insurance plans offer free or low-cost oral contraceptives. If you are paying without insurance, our prescription discount card can help you save up to 80% on prescriptions.

  • How can I refill my Errin prescription?

    To refill your Errin prescription, book a virtual appointment with one of our top rated board-certified doctors. After reviewing your medical history, your doctor can send an electronic prescription to your local pharmacy.

  • Who should not take Errin?

    To make sure progestin-only hormonal contraceptives are safe for you, tell your doctor if you have:

    • Heart disease or high blood pressure

    • History of blood clots, heart attack, or stroke

    • Kidney or liver disease

    • Migraine headaches

    • Uterine fibroid tumors

    • Breast cancer

    • Diabetes

    If you have underlying risk factors for cardiovascular disease, such as high blood pressure, you may require regular laboratory and medical tests to make sure hormonal birth control is safe for you.

    Women who are 35 years or older and who smoke should not use oral contraceptives to prevent pregnancy. Ask your doctor for medical advice about non-hormonal birth control.

  • How long after starting Errin is it effective?

    If you start Errin on the first day of your menstrual period, full protection from pregnancy will begin in 48 hours. If you start Errin on another day, the birth control can take up to three weeks to achieve maximum contraceptive effectiveness. Make sure to use a back-up birth control method to prevent unintended pregnancy.

  • Do you get your period while taking Errin?

    Errin affects everyone differently. Some women will not get their menstrual period while taking a progestin-only oral contraceptive. In most cases, progestin-only oral contraceptive users experience light bleeding and spotting at the time of their regular menstrual period.

    If you miss your period for two months in a row, tell your doctor. Your doctor may recommend a pregnancy test to rule out unintended pregnancy.

  • Do you still ovulate on Errin birth control?

    No, you don't ovulate on Errin birth control. When taken daily, Errin prevents ovulation and changes the cervical mucus and uterine lining to prevent fertilized egg attachment.

  • Does Errin make you gain weight?

    Yes, weight gain is a possible side effect of Errin birth control.

  • What happens if I miss a dose of Errin?

    If you miss a dose of Errin, ask your doctor for medical advice. Missing pills can increase your risk of pregnancy. If you're more than three hours late for your dose, take the missed dose as soon as you remember and use back-up birth control for 48 hours.

  • What happens if I take too much Errin?

    If you've taken too much Errin, ask your doctor for medical advice or contact your local poison control center. An overdose of Errin birth control is not expected to be dangerous.

3 simple steps to request your Errin prescription today 

Step 1: Book an appointment

Step 1

Book an Errin prescription request appointment.

Book a same day appointment from anywhere.

Step 2: Visit with a doctor on your smartphone

Step 2

Talk to your medical provider regarding your Errin prescription.

Visit with a doctor on your smartphone or computer.

Step 3: pick up at local pharmacy

Step 3

Pick up your Errin prescription.

We can send prescriptions to any local pharmacy.

Errin prescription pricing details

How pricing works

To get a new or refill on your Errin prescription, join our monthly membership and get discounted visits.

Paying with insurance



First month free



30 days of free membership

  • Same-day appointments 7 days a week

  • Unlimited messages with your Care Team

  • Prescription discount card to save up to 80%

  • Exclusive discounts on lab tests

  • Free memberships for your family

  • Cancel anytime

Visit price with insurance

Often the same as an office visit. Most patients with in-network insurance pay $30 or less!

  • We accept these insurance plans and many more:

    • Humana
    • Aetna
    • United Healthcare

Paying without insurance



First month free



30 days of free membership

  • Same-day appointments 7 days a week

  • Unlimited messages with your Care Team

  • Prescription discount card to save up to 80%

  • Exclusive discounts on lab tests

  • Free memberships for your family

  • Cancel anytime

Visit price without insurance

Initial visits are $129.

Book an appointment

If we're unable to treat you, we'll provide a full refund.


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PlushCare content is reviewed by MDs, PhDs, NPs, nutritionists, and other healthcare professionals. Learn more about our editorial standards and meet the medical team. The PlushCare site or any linked materials are not intended and should not be construed as medical advice, nor is the information a substitute for professional medical expertise or treatment.