Period delay tablets UK: how to postpone your period safely
UK period delay treatment explained — when to start tablets, how long you can delay, and who should not use them.
Period delay is a common request before travel, exams or events. It is medically established when timed correctly — but starting late or using it with certain conditions is unsafe.
How period delay works
Natural progesterone falls before a period, triggering womb lining shedding. Delay tablets maintain progesterone levels so shedding is postponed.
Timing is everything
Know your usual cycle length. Start tablets 3 days before your expected period — not on the day bleeding begins.
What to expect when you stop
A withdrawal bleed usually starts 2–3 days after the last tablet. Flow may be heavier than a normal period for some women.
Who should not delay periods online
Avoid without specialist advice if:
- Pregnant or could be pregnant
- Unexplained vaginal bleeding
- History of blood clots on combined hormones
- Under 18
Request review via period delay tablets.
Frequently asked questions
Can I delay my period for a holiday?
Yes — prescription progesterone tablets started 3 days before your period is due can delay bleeding for up to 17 days in suitable women.
When do I start period delay tablets?
Start 3 days before your period is expected based on your usual cycle length. Starting late may cause breakthrough bleeding.
Are period delay tablets safe?
Safe for many women short-term, but not suitable if pregnant, with unexplained bleeding, or certain clotting conditions — prescriber review required.
Will delaying my period affect future cycles?
Usually your next natural period arrives 2–3 days after stopping tablets. Cycles typically return to normal pattern.
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