Active Ingredient(s): Norethindrone
FDA Approved: * October 21, 2002
Pharm Company: * BARR
Category: Women's Health / Fertility

* This drug may consist of multiple approval dates, manufacturers, or distributors. If applicable, they would be listed below under "NDC Database Records".

Errin Overview

Norethisterone, also known as norethindrone and sold under many brand names, is a progestin medication used in birth control pills, menopausal hormone therapy, and for the treatment of gynecological disorders.[3][5] The medication is available in both low-dose and high-dose formulations and both alone and in combination with an estrogen.[5][6] It is used by mouth or, as norethisterone enanthate, by injection into muscle.[...

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Details May Include Instructions, Side Effects, Interactions, Etc. Drug monograph is from Wikipedia. All text is available under the terms of the GFDL (GNU Free Documentation License). Source:

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344 yellow

Its a round yellow pill with the numbers 344 on one side. And a letter b or 9 on the other side ## A yellow round pill with 344 on one side and a b on the other side which stands for barr, which is the maker, is a birth control pill. I know this because I take that pill. ## To add some more details, the brand name of it is Errin, it is used to prevent pregnancy, and to treat some hormonal problems as deemed appropriate by a doctor. It contains .35mgs of Norethindrone. NDC: 00555-0344 Its typical side effects may include nausea, dizziness, night sweats, irregular bleeding, and unusual periods. Inactive ingredients may include: Anhydrous Lactose Starch, Corn D&c Yellow No. 10 Aluminum Oxide Lactose Monohydrate Magnesium Stearate Cellulose, Microcrystalline Povidone K90 Is there anyth...

errin tablet

birth control pills ## Been having a lot of problems this last month or so. Joint and muscle pain, fatigue, heart palpitations, nausea, wearing a halter monitor now and having some extra blood work done but the nurse suggested I check into my BC to see if this could be causing the problems. This week has been so bad I barely have been able to get out of bed. Anyone else have similar symptoms?


Possible Dosages for this and Related Drugs:

  • Tablet: 0.35mg, 5mg
Note: Above list includes dosages for all drugs with the same combination of active ingredients.

NDC Database Records for Errin: (3 results)

Sorted by National Drug Code
  • 0555-0344 Errin 28 Day Pack by Barr Laboratories Inc.
  • 51862-100 Errin .35 mg Oral Tablet by Mayne Pharma Inc.
  • 51862-886 Errin .35 mg Oral Tablet by Mayne Pharma Inc.

Other drugs which contain Norethindrone or a similar ingredient: (110 results)

Related Errin Topics:

errin tablet
birth control pills ## Been having a lot of problems this last month or so. Joint and muscle pain, fatigue, heart palpit... 1 reply