Menoral Tablet 5 mg Introduction
Norethisterone acetate is a progestogen hormone medicine which acts on the female reproductive organs. It is used to treat heavy menstrual bleeding, endometriosis, painful menstrual periods and dysfunctional uterine bleeding. Norethisterone acetate is a synthetic hormone based on progesterone, which is a natural female hormone.
Uses
Norethisterone acetate is primarily used to treat problems related to abnormal bleeding from the womb, such as heavy or painful menstrual periods, endometriosis and dysfunctional uterine bleeding. It is also sometimes prescribed to treat premenstrual syndrome.
| Brand Name | Menoral |
|---|---|
| Type | Tablet |
| Weight | 5 mg |
| Generic | Norethisterone Acetate |
| Manufacturer | Square Pharmaceuticals Ltd. |
| Available in | English বাংলা |
Mechanism of Action
Norethisterone acetate works by inducing a thickening of the womb’s lining. This thickening creates a protective barrier that prevents endometriosis from developing and also helps to stabilize hormone levels. In addition, norethisterone acetate helps to reduce the amount of endometrial shedding, which helps to reduce heavy menstrual bleeding.
How Long Does It Take to Work?
Norethisterone acetate is typically started one or two days after the first day of menstrual bleeding. It usually takes a few days for the medication to take full effect.
Absorption
Norethisterone acetate is readily and quickly absorbed when taken by mouth. It reaches peak levels in the blood within three to four hours. The half-life of the drug is about nine hours.
Route of Elimination
Norethisterone acetate is metabolized in the liver and eliminated from the body primarily through the kidneys. Approximately 10-25% of the administered dose is excreted as metabolites in the urine.
Dosage
Oral administration. Not intended for use in children.Metropathia haemorrhagica (dysfunctional uterine bleeding): 1 tablet 3 times daily for 10 days. Bleeding is arrested usually within 1-3 days. A withdrawal bleeding resembling normal menstruation occurs within 2-4 days after discontinuing treatment.
Prophylaxis against recurrence of dysfunctional bleeding: If there are no signs of resumption of normal ovarian function (no rise in the second half of the cycle of the morning temperature, which should be measured daily) recurrence must be anticipated. Cyclical bleeding can be established with 1 tablet twice daily from the 19th to the 26th day of the cycle.
Premenstrual syndrome (including premenstrual mastalgia): Premenstrual symptoms such as headache, migraine, breast discomfort, water retention, tachycardia, and psychological disturbances may be relieved by the administration of 2-3 tablets daily from the 19th to the 26th day of the cycle. Treatment should be repeated for several cycles. When treatment is stopped, the patient may remain symptom-free for a number of months.
Postponement of menstruation: In cases of too frequent menstrual bleeding, and in special circumstances (e.g. operations, travel, sports) the postponement of menstruation is possible. 1 tablet of Norethisterone three times daily, starting 3 days before the expected onset of menstruation. A normal period should occur 2-3 days after the patient has stopped taking tablets.
Endometriosis (pseudo-pregnancy therapy): Long-term treatment is commenced on the 5th day of the cycle with 2 tablets of Norethisterone daily for the first few weeks. In the event of spotting, the dosage is increased to 4, and, if necessary, 5 tablets daily. After bleeding has ceased, the initial dose is usually sufficient. Duration of treatment: 4-6 months continuously, or longer if necessary.
Menorrhagia (hypermenorrhoea): 1 tablet 2-3 times a day from the 19th to the 26th day of the cycle (counting the first day of menstruation as day 1).
Norethisterone acetate is usually taken at a dose of 5mg three times a day for the first three days and then 5mg two times a day for the following four days.
Administration
Norethisterone acetate should be taken at the same time each day. It can be taken with or without food. It may take several days for the patient to feel the full effect of the medication.
Side Effects
Norethisterone acetate can cause some common side effects such as bloating, breast tenderness, headache, nausea, and breakthrough bleeding. These side effects are usually temporary and will go away on their own.
Toxicity
Norethisterone acetate is generally not considered to be a toxic drug. However, the risk of serious side effects may increase in patients taking high doses of the medication. Overdosing may lead to symptoms such as nausea, vomiting, abdominal pain, and drowsiness.
Precautions
Before taking norethisterone acetate, it is important to discuss all possible risks and side effects with a doctor. This medication may not be appropriate for everyone, and certain medical conditions, such as liver and kidney disease or a history of blood clots, may make it dangerous. Women who are pregnant or breastfeeding should not take this medication.
Interactions
Norethisterone acetate may interact with other medications, such as anticoagulants and some antibiotics. It is important to tell the doctor about any medications that are being taken prior to taking this medication.
Disease Interactions
Norethisterone acetate may interact with certain diseases, such as liver or kidney disease, and may worsen existing conditions. It is important to tell the doctor about any medical conditions before taking this medication.
Drug Interactions
Norethisterone acetate may interact with other medications, such as anticoagulants and some antibiotics. It is important to tell the doctor about any medications that are being taken prior to taking this medication.
Food Interactions
Norethisterone acetate may interact with certain foods, such as grapefruit juice. It is important to discuss any potential food interactions with the doctor prior to taking this medication.
Pregnancy Use
Norethisterone acetate is not recommended for use during pregnancy as it may cause harm to the fetus. It is important to discuss the risks and benefits of taking this medication with the doctor.
Lactation Use
Norethisterone acetate is not recommended for use while breastfeeding. It is important to discuss the risks and benefits of taking this medication with the doctor.
Acute Overdose
An acute overdose of norethisterone acetate may lead to symptoms such as nausea, vomiting, abdominal pain, and drowsiness. It is important to seek medical attention if an overdose is suspected.
Contraindication
Norethisterone acetate should not be taken by people who are pregnant, breastfeeding, or have a history of blood clots or liver/kidney disease.
Use Direction
Norethisterone acetate should be taken at the same time each day with or without food. It is important to follow the doctor’s instructions and take the medication as prescribed.
Storage Condition
Norethisterone acetate should be stored at room temperature, away from heat, moisture, and direct light.
Volume of Distribution
Norethisterone acetate has a volume of distribution of 15-20 L/kg.
Half Life
Norethisterone acetate has a half-life of approximately nine hours.
Clearance
Norethisterone acetate is cleared from the body primarily by the kidneys. Approximately 10-25% of the administered dose is excreted as metabolites in the urine.
See in details version Menoral Tablet 5 mg also Menoral Tablet 5 mg in bangla
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Some Frequently Asked Questions About Menoral Tablet 5 mg
1. What is norethisterone acetate?
Norethisterone acetate is a synthetic progestin (progesterone-like hormone) used to regulate menstrual cycles, treat hormonal conditions, and provide contraception.
2. What is norethisterone acetate used for?
It is used to:
3. How does norethisterone acetate work?
It mimics progesterone, regulating the uterine lining and suppressing ovulation when used in contraception, or stabilizing hormone levels for other conditions.
4. Is norethisterone acetate a prescription drug?
Yes, it requires a prescription from a healthcare provider.
5. Who can take norethisterone acetate?
It’s suitable for women needing hormonal regulation, but not for those with liver disease, blood clots, or certain cancers unless advised by a doctor.
6. How is norethisterone acetate taken?
It is taken orally as tablets, with or without food, depending on the purpose.
7. What is the typical dosage of norethisterone acetate?
Dosage varies:
8. How long does norethisterone acetate take to work?
For delaying periods, it works within 1-2 days; for other conditions, effects may take weeks.
9. Can norethisterone acetate be taken long-term?
Yes, for conditions like endometriosis or HRT, but short-term use is common for delaying periods.
10. Does norethisterone acetate prevent pregnancy?
Yes, when used as a progestin-only contraceptive pill (mini-pill), but not when used short-term to delay periods.
11. What are the common side effects of norethisterone acetate?
Common side effects include:
12. Can norethisterone acetate cause bleeding?
Yes, breakthrough bleeding or spotting may occur, especially with irregular use.
13. Does norethisterone acetate affect fertility?
No, fertility typically returns quickly after stopping, unless underlying conditions affect it.
14. Can norethisterone acetate be taken with food?
Yes, it can be taken with or without food; food may reduce nausea.
15. What happens if I miss a dose of norethisterone acetate?
For contraception, take it as soon as remembered (within 3 hours) or use backup protection. For other uses, take it when remembered unless near the next dose.
16. Can I overdose on norethisterone acetate?
Overdose is rare but may cause nausea or vomiting. Seek medical help if suspected.
17. Is norethisterone acetate safe during pregnancy?
No, it’s not recommended during pregnancy (Category X) as it may harm the fetus.
18. Can breastfeeding mothers take norethisterone acetate?
It may reduce milk supply; progestin-only pills are safer options, but consult a doctor.
19. Does norethisterone acetate interact with other medications?
Yes, it interacts with:
20. Can I drink alcohol while taking norethisterone acetate?
Yes, moderate alcohol is usually fine, but excessive drinking may worsen side effects like nausea.
21. Is norethisterone acetate safe for people with kidney disease?
Use with caution; consult a doctor as it’s metabolized by the liver but excreted by kidneys.
22. Can norethisterone acetate be used in liver disease?
No, it’s contraindicated in severe liver disease due to metabolism in the liver.
23. How should norethisterone acetate be stored?
Store at room temperature, away from moisture, heat, and light.
24. Does norethisterone acetate expire?
Yes, check the expiration date; expired tablets may lose potency.
25. Can norethisterone acetate cause mood swings?
Yes, hormonal changes may lead to mood swings or irritability in some users.
26. Is norethisterone acetate the same as progesterone?
No, it’s a synthetic progestin, not natural progesterone, with similar but stronger effects.
27. Can norethisterone acetate treat menopause symptoms?
Yes, it’s used in HRT to protect the uterus when combined with estrogen.
28. Does norethisterone acetate cause weight gain?
Yes, weight gain is a possible side effect due to fluid retention or increased appetite.
29. Can norethisterone acetate help with acne?
It may help or worsen acne, depending on individual hormonal response.
30. Is norethisterone acetate gluten-free?
Most formulations are gluten-free, but confirm with the manufacturer.
31. Can norethisterone acetate tablets be crushed?
Yes, if needed, but consult a doctor or pharmacist for proper administration.
32. What if I’m allergic to norethisterone acetate?
Rare allergic reactions (rash, swelling) may occur. Stop use and seek help.
33. Can norethisterone acetate cause blood clots?
Yes, though the risk is lower than with combined contraceptives, it’s still a concern, especially with other risk factors.
34. Does norethisterone acetate affect blood pressure?
It may cause slight increases in some users; monitor if you have hypertension.
35. Can norethisterone acetate treat PCOS?
It can regulate periods in polycystic ovary syndrome (PCOS) but doesn’t cure it.
36. Is norethisterone acetate safe for teenagers?
Yes, it’s used in teens for menstrual issues, under medical supervision.
37. Can norethisterone acetate cause headaches?
Yes, headaches are a common side effect, especially initially.
38. Does norethisterone acetate need refrigeration?
No, store at room temperature.
39. Can norethisterone acetate be used for contraception alone?
Yes, as a progestin-only pill (e.g., Micronor), taken daily without a break.
40. What’s the difference between norethisterone acetate and levonorgestrel?
Both are progestins, but norethisterone acetate is more commonly used for menstrual regulation, while levonorgestrel is frequent in emergency contraception.
41. Can norethisterone acetate cause breast pain?
Yes, breast tenderness is a frequent side effect due to hormonal effects.
42. Is norethisterone acetate available as a generic?
Yes, generic versions are available, alongside brands like Aygestin.
43. Can norethisterone acetate be taken at night?
Yes, timing doesn’t matter unless part of a specific regimen.
44. Does norethisterone acetate affect libido?
It may decrease libido in some users due to hormonal changes.
45. Can norethisterone acetate be used for heavy bleeding?
Yes, it’s often prescribed to reduce heavy menstrual bleeding.
46. What should I do if I experience severe side effects?
Stop use and contact your doctor, especially for signs of clots (e.g., leg pain, chest pain).
47. Can norethisterone acetate cause fatigue?
Yes, tiredness is a possible side effect.
48. Does norethisterone acetate interact with caffeine?
No significant interaction, but caffeine may worsen headaches.
49. Can norethisterone acetate be stopped abruptly?
For short-term use (e.g., delaying periods), yes; for contraception, consult a doctor to avoid pregnancy risk.
50. Where can I buy norethisterone acetate?
It’s available at pharmacies with a prescription, as a generic or under brand names like Aygestin or Primolut-N.
Prof. Dr. Shahidul Islam
Orthopedics (Bone, Joint, Arthritis, Trauma) Specialist & Spine Surgeon
