Ortho Micronor Side Effects Center

Last updated on RxList: 6/29/2021
Ortho Micronor Side Effects Center

What Is Ortho Micronor?

Ortho Micronor (norethindrone) is a form of progesterone, a female hormone, used for birth control (contraception) to prevent pregnancy. Ortho Micronor is also used to treat menstrual disorders, endometriosis, or abnormal vaginal bleeding caused by a hormone imbalance. Ortho Micronor is available in generic form.

What Are Side Effects of Ortho Micronor?

Common side effects of Ortho Micronor include:

  • nausea,
  • vomiting,
  • stomach cramping,
  • bloating,
  • dizziness,
  • headache,
  • tiredness,
  • breast pain/swelling/tenderness,
  • decrease in breast size,
  • freckles or darkening of facial skin,
  • acne,
  • oily scalp,
  • hair loss,
  • increased hair growth,
  • weight gain,
  • vaginal itching/discharge/infections,
  • skin itching or rash,
  • changes in menstrual periods, or
  • decreased sex drive.

Tell your doctor if you have serious side effects of Ortho Micronor including:

  • lumps in the breast,
  • mental/mood changes (such as new/worsening depression),
  • severe stomach or abdominal pain,
  • unusual changes in vaginal bleeding (such as continuous spotting, sudden heavy bleeding, missed periods),
  • dark urine, or
  • yellowing eyes or skin

Dosage for Ortho Micronor

Ortho Micronor must be taken exactly as directed. One tablet is taken every day, at the same time. Administration is continuous, with no interruption between pill packs.

What Drugs, Substances, or Supplements Interact with Ortho Micronor?

Ortho Micronor may interact with griseofulvin, rifampin, St. John's wort, ketoconazole or itraconazole, barbiturates, or HIV medicines. Tell your doctor all medications you are taking.

Ortho Micronor During Pregnancy or Breastfeeding

Ortho Micronor should not be used during pregnancy. If you become pregnant or think you may be pregnant, inform your doctor immediately. This drug passes into breast milk and may have undesirable effect on a nursing infant. Consult your doctor before breastfeeding.

Additional Information

Our Ortho Micronor (norethindrone) Tablets Side Effects Drug Center provides a comprehensive view of available drug information on the potential side effects when taking this medication.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.


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Ortho Micronor Consumer Information

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Get emergency medical help if you have signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.

Call your doctor at once if you have:

  • sudden vision loss, bulging eyes, or severe headache;
  • swelling, rapid weight gain;
  • unusual vaginal bleeding;
  • missed menstrual periods;
  • pelvic pain (especially on one side);
  • a breast lump;
  • a light-headed feeling, like you might pass out;
  • increased thirst, increased urination;
  • liver problems--loss of appetite, stomach pain (upper right side), dark urine, jaundice (yellowing of the skin or eyes); or
  • signs of a blood clot--sudden numbness or weakness, problems with vision or speech, chest pain, shortness of breath, swelling or redness in an arm or leg.

Common side effects may include:

  • irregular vaginal bleeding or spotting;
  • headache;
  • breast pain or swelling;
  • stomach pain, bloating, nausea, vomiting;
  • hair loss;
  • depressed mood, trouble sleeping;
  • weight gain; or
  • vaginal itching or discharge.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.


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Ortho Micronor Professional Information


Adverse reactions reported with the use of POPs include:

  • Menstrual irregularity is the most frequently reported side effect.
  • Frequent and irregular bleeding are common, while long duration of bleeding episodes and amenorrhea are less likely.
  • Headache, breast tenderness, nausea, and dizziness are increased among progestin-only oral contraceptive users in some studies.
  • Androgenic side effects such as acne, hirsutism, and weight gain occur rarely.

Read the entire FDA prescribing information for Ortho Micronor (Norethindrone)

© Ortho Micronor Patient Information is supplied by Cerner Multum, Inc. and Ortho Micronor Consumer information is supplied by First Databank, Inc., used under license and subject to their respective copyrights.

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