Period delaying medicine
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period delaying medicine norethisterone how to use dose side effects 2025
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Here is a clear overview of medicines used to delay a period:
Period-Delaying Medicines
1. Norethisterone (Most Common Option)
What it is: A synthetic progestogen (mimics progesterone) that keeps the uterine lining stable, preventing shedding (i.e., your period).
How to use:
- Dose: 5 mg (1 tablet) three times a day
- Start taking it 3 days before your expected period
- Continue until you want your period to begin
- Can be used for up to 17-27 days (per most prescribing guidance)
- Your period will usually arrive 2-3 days after stopping
Important notes:
- It is not a contraceptive - it will not prevent pregnancy
- Requires a prescription in most countries
- Not suitable if you have a history of blood clots, liver disease, or are pregnant
Common side effects:
- Nausea
- Breast tenderness
- Bloating
- Headaches
- Mood changes
- Spotting/breakthrough bleeding
2. Combined Oral Contraceptive Pill (COC)
If you are already on the pill, you can delay your period by skipping the pill-free interval (or the placebo pills in a 28-day pack) and starting the next pack immediately. This is a well-established and safe method.
How it works: The withdrawal bleed you get on the pill is not a true period - it is triggered by the hormone-free gap. Skipping this gap prevents the bleed.
3. Medroxyprogesterone Acetate (Provera)
Another progestogen sometimes prescribed for period delay or cycle regulation, used in a similar fashion to norethisterone.
Comparison at a Glance
| Feature | Norethisterone | COC Pill | Medroxyprogesterone |
|---|---|---|---|
| Prescription needed | Yes | Yes | Yes |
| Delay duration | Up to ~27 days | Indefinitely (run packs back-to-back) | Short-term |
| Contraceptive effect | No | Yes | No |
| Suitability for non-pill users | Yes | No (new start needs time) | Yes |
Who Should Not Use These Medicines
- Pregnant or possibly pregnant women
- Those with a history of blood clots (DVT/PE)
- History of breast or hormone-sensitive cancer
- Severe liver disease
- Unexplained vaginal bleeding
- Those with migraine with aura (COC is especially contraindicated)
Disclaimer: These medicines require a doctor's prescription. Always consult a healthcare professional before starting, as suitability depends on your medical history, current medications, and individual circumstances. Do not self-medicate.
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