Norethisterone tablets — the most commonly used medication to delay a period in Sri Lanka. | Sineth Hospitals
Written & Reviewed by
MBBS (Col) · MD (Col) · SLMC No. 27329 · Medical Director, Sineth Hospitals
🩺 Medically Reviewed
📅 Updated March 26, 2026
🕐 5 min read
Quick Answer
To delay your period, norethisterone tablets are usually started 3 days before your expected date and continued until you want to postpone bleeding. Your period usually starts 2–5 days after stopping the tablets.
📋 Overview
What Does It Mean to Delay a Period?
Delaying a period means postponing your menstrual bleeding for a short time using medication. It is a temporary adjustment to your natural cycle — your period will return after you stop taking the medication.
This is not a treatment for a disease
Period delay tablets do not cure any condition. They only temporarily postpone bleeding. They do not permanently regulate your cycle.
⏰ When It Is Used
When Is It Used?
Period delay is commonly requested for short-term, practical reasons:
- Travel — to avoid bleeding during a long journey or holiday
- Exams — to avoid discomfort during important exams
- Religious events — such as pilgrimage or fasting periods
- Weddings or special occasions
- Sports events or swimming competitions
💊 Main Method
Norethisterone — The Most Commonly Used Method in Sri Lanka
The most widely used medication to delay a period in Sri Lanka is norethisterone (also known by brand names such as Primolut N). It is a synthetic progestogen that keeps hormone levels steady, preventing the uterus from shedding its lining — thus delaying your period.
How It Works (Simply)
- It keeps progestogen levels elevated
- This prevents the uterine lining from shedding
- Your period is delayed for as long as you continue taking the tablets
📋 How to Use
How to Use Norethisterone
| When to Start | Dose | Frequency | After Stopping |
|---|---|---|---|
| 3 days before your expected period | 5 mg tablet | 2–3 times daily | Period usually comes within 2–5 days |
Very Important Instructions
- Do not start after bleeding has already begun — it will not work
- Take tablets at regular times each day
- Do not use for long-term or continuous use
- Use only occasionally when genuinely needed
⚠️ Side Effects
Side Effects (Usually Mild and Temporary)
Possible side effects include:
- Bloating
- Breast tenderness
- Mood changes
- Headache
- Nausea
These side effects are usually mild and temporary — they go away after stopping the tablets.
🚫 Who Should NOT Use It
Who Should NOT Use Norethisterone?
Do not use norethisterone without medical advice if you have:
- A history of blood clots (DVT or pulmonary embolism)
- Liver disease
- Breast cancer or a history of hormone-sensitive cancer
- Unexplained vaginal bleeding
- Known or suspected pregnancy
Always consult your doctor first if you have any medical conditions or take other medications. Do not self-medicate if you are unsure.
🔬 Other Options
Other Options
Combined Oral Contraceptive Pills
If you are already using combined contraceptive pills, you can delay your period by skipping the inactive (placebo) pills and starting the next pack immediately. This avoids the withdrawal bleed. Discuss this with your doctor first.
Medroxyprogesterone
Sometimes used as an alternative to norethisterone. Requires medical advice — not for self-medication.
❗ Important Points
Important Clarifications
This is NOT contraception
Norethisterone at these doses does not reliably prevent pregnancy. Do not use it as a contraceptive method.
NOT for regular use
Use only occasionally when genuinely needed. It is not a long-term solution for managing your cycle.
Does NOT fix irregular periods
Period delay tablets are not a treatment for irregular cycles. If you have irregular periods, see a doctor for proper evaluation.
🚨 See a Doctor
When Should You See a Doctor?
- If you have frequently irregular or missed periods
- If you experience severe side effects after taking the tablets
- If you are unsure about safety or have medical conditions
- If you need long-term cycle management — there are better, safer options
🗺️ Quick Guide
Quick Decision Guide
Do you want to delay your period for a short time?
1
Do you know your expected period date? → You need to know this to start on time.
↓
2
Has bleeding already started? → If yes, tablets will not work to delay it. If no, proceed.
↓
3
Start norethisterone 3 days before your expected period date. Take 5 mg, 2–3 times daily. Continue until you want to delay.
↓
4
Stop the tablets when you are ready. Your period will usually come within 2–5 days.
↓
5
If your period does not come within a week of stopping, or you have concerns — see your doctor.
💬 FAQs
Frequently Asked Questions
You can typically delay your period by up to 10–14 days. Longer delays should be discussed with a doctor, as prolonged use is not recommended.
Start taking norethisterone 3 days before your expected period date. Do not start after bleeding has already begun — it will not work.
Your period usually starts within 2–5 days after you stop taking the tablets.
No. Norethisterone does not affect future fertility. Your cycle will return to normal after stopping the medication.
No. Period delay tablets are not recommended for regular monthly use. Use only occasionally when genuinely needed. If you want to manage your cycle regularly, see a doctor for better options.
No. Norethisterone at these doses (used to delay a period) does not reliably prevent pregnancy. Do not use it as a contraceptive method.