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Errin (Generic Progestin-Only Oral Contraceptives)

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Why is this medication prescribed?

Errin is prescribed primarily as a contraceptive method to prevent pregnancy. It contains a progestin hormone (norethindrone) and works by inhibiting ovulation (the release of an egg from the ovary) and thickening cervical mucus, making it difficult for sperm to reach the egg. It is particularly useful for women who cannot or prefer not to use combined hormonal contraceptives, which contain both estrogen and progestin.

How should this medicine be used?

Here’s how Errin is typically used:

  • Daily Administration: Errin is taken orally, at the same time every day, without interruption.
  • Start of Usage: It’s advisable to start taking Errin on the first day of your menstrual period. If started later than the first day of your period, additional contraceptive methods should be used for the first 48 hours.
  • Dosage: Each pack contains 28 tablets. After finishing a pack, start a new pack the following day.
  • Missed Doses: If you miss a dose, take it as soon as you remember, even if it means taking two pills in one day. If you miss two or more doses, use backup contraception (like condoms) until you’ve taken a pill daily for at least two days.
  • Consistency: Consistency is key for the effectiveness of Errin. Missing doses or taking them at irregular times may reduce its efficacy in preventing pregnancy.
  • Consultation: Always consult with a healthcare professional before starting or discontinuing any contraceptive method. They can provide personalized guidance and answer any questions or concerns you may have.
  • Effectiveness: While Errin is highly effective when taken as directed, no contraceptive method is 100% foolproof. It’s essential to understand the risks and benefits and to use additional protection if needed, such as condoms, to prevent sexually transmitted infections (STIs).

Remember, Errin is a prescription medication, so it’s essential to follow your healthcare provider’s instructions carefully for optimal efficacy and safety.

Other uses for this medicine

  • Treatment of Endometriosis: Endometriosis is a painful condition where tissue similar to the lining of the uterus grows outside the uterus. Progestin-only pills like Errin can help manage symptoms and reduce the growth of this tissue.
  • Management of Menstrual Disorders: Errin may be used to regulate irregular menstrual cycles or to treat heavy or prolonged menstrual bleeding.
  • Relief of Menstrual Pain: Progestin-only pills can also help alleviate menstrual pain (dysmenorrhea) by reducing the amount of uterine lining that builds up each month.

What special precautions should I follow?

Special precautions to follow when using Errin include:

  • Timing: It’s crucial to take Errin at the same time every day to maintain its effectiveness in preventing pregnancy.
  • Backup Contraception: If you miss a dose or take it more than three hours later than usual, you should use backup contraception (such as condoms) for the next 48 hours to ensure continued protection against pregnancy.
  • Consultation with Healthcare Provider: Before starting Errin or any other contraceptive method, it’s essential to consult with a healthcare provider. They can help determine if Errin is suitable for you based on your medical history and any other medications you may be taking.
  • Monitoring Side Effects: While rare, some women may experience side effects such as irregular bleeding, headaches, breast tenderness, or mood changes when taking Errin. If you experience any concerning symptoms, it’s essential to report them to your healthcare provider.
  • Health Considerations: Women with certain medical conditions such as liver disease, breast cancer, or a history of blood clots may need to avoid progestin-only pills like Errin. Your healthcare provider will consider these factors when prescribing medication.
  • Smoking: Women who smoke, especially those over the age of 35, may have an increased risk of blood clots when taking hormonal contraceptives like Errin.

Always follow your healthcare provider’s instructions and advice when using Errin or any other medication to ensure safe and effective use.

What special dietary instructions should I follow?

Regarding special dietary instructions for Errin, there are no specific dietary restrictions associated with its use. However, maintaining a healthy diet and lifestyle is always beneficial for overall health.

What should I do if I forget a dose?

  • Take the Missed Pill ASAP: Take the missed pill as soon as you remember, even if it means taking two pills in one day.
  • Backup Contraception: If you miss two or more doses, use backup contraception (like condoms) until you’ve taken a pill daily for at least two days.
  • Consultation: If you’re unsure what to do or if you’ve missed multiple doses, consult your healthcare provider for guidance.

What side effects can this medication cause?

Errin, like any medication, can potentially cause side effects, although not everyone will experience them. Common side effects associated with Errin (norethindrone) may include:

  • Irregular menstrual bleeding or spotting
  • Breast tenderness
  • Headaches
  • Nausea
  • Mood changes
  • Acne
  • Weight changes
  • Fatigue

Serious side effects are rare but can occur. These may include:

  • Blood clots (thrombosis): Symptoms may include swelling, pain, or redness in the legs, sudden chest pain, difficulty breathing, or coughing up blood.
  • Allergic reactions: Symptoms may include rash, itching, swelling of the face, tongue, or throat, severe dizziness, or trouble breathing.
  • Liver problems: Signs may include yellowing of the skin or eyes, dark urine, or persistent nausea or vomiting.

If you experience any severe or persistent side effects while taking Errin, it’s essential to contact your healthcare provider promptly. They can assess your symptoms and determine the appropriate course of action, which may involve adjusting your medication or exploring alternative contraceptive options.

It’s important to note that the benefits of using Errin usually outweigh the risk of side effects for most women. However, it’s crucial to be aware of potential side effects and to discuss any concerns with your healthcare provider before starting this medication.

What should I know about storage and disposal of this medication?

When it comes to the storage and disposal of Errin, here’s what you should know:


  • Store Errin at room temperature away from moisture, heat, and light.
  • Keep it out of reach of children and pets.
  • Do not store Errin in the bathroom, as moisture and humidity can affect its potency.


  • Dispose of expired or unused Errin properly. Do not flush it down the toilet or pour it down the drain unless instructed to do so.
  • Follow any specific disposal instructions provided by your healthcare provider or pharmacist.
  • You can inquire about local medication take-back programs or community disposal locations for safe disposal of medications.

In case of emergency/overdose

If you suspect an overdose or have accidentally taken too much Errin, seek emergency medical attention or contact your local poison control center immediately. Overdose symptoms may include nausea, vomiting, or vaginal bleeding.

What other information should I know?

  • Errin does not protect against sexually transmitted infections (STIs). You should use condoms or other barrier methods to reduce the risk of STIs.
  • Inform your healthcare provider about all medications, supplements, or herbal products you are taking before starting Errin, as some medications may interact with it.
  • Attend regular check-ups with your healthcare provider while taking Errin to monitor its effectiveness and any potential side effects.
  • If you experience persistent or severe abdominal pain, it could indicate a possible ectopic pregnancy (pregnancy outside the uterus), which requires immediate medical attention.
  • Errin may affect your menstrual cycle, causing irregular bleeding or spotting. This is common, especially during the first few months of use, but if it persists or becomes bothersome, consult your healthcare provider.
  • If you plan to become pregnant or suspect you are pregnant while taking Errin, discontinue its use and consult your healthcare provider.

Always follow your healthcare provider’s instructions and advice when using Errin or any other medication to ensure safe and effective use.

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