Period Delay | Norethisterone Tablets | Cardiff

Can I Get Period Delay Tablets in Cardiff?

Yes. Hopwoods Pharmacy in Cardiff provides a private period delay service using norethisterone, a prescription-only progestogen hormone. This service is available for adults aged 16 and over who wish to postpone menstruation for special occasions such as holidays, religious events, sporting events, or celebrations.

The service is delivered via an online consultation set by our pharmacist independent prescriber. The pharmacist will clinically review your assessment to ensure norethisterone is safe and appropriate for your individual circumstances. This is not a contraceptive service – norethisterone does not protect against pregnancy.

What Is Period Delay Treatment?

Period delay treatment uses norethisterone, a synthetic progestogen hormone that maintains the lining of the womb (endometrium) by keeping progesterone levels elevated. When you stop taking norethisterone and progesterone levels fall, your period will begin within 2-3 days.

Patients typically request period delay for holidays, weddings, religious observances, sporting competitions, or other occasions where menstruation would be particularly inconvenient. The treatment can delay your period for up to 17 days (maximum).

Important: Norethisterone does not act as a contraceptive. You must use reliable contraception (condoms, long-acting reversible contraception) if sexually active during treatment.

How Does Norethisterone Work?

The menstrual cycle is regulated by fluctuating hormone levels. In the second half of your cycle (luteal phase), progesterone levels rise to maintain the womb lining in case of pregnancy. If pregnancy does not occur, progesterone levels fall, triggering the womb lining to shed – resulting in your period.

Norethisterone mimics natural progesterone, keeping levels artificially high and preventing the lining from shedding. When you stop taking norethisterone, progesterone levels drop, and your period begins within 2-3 days.

Dosing: One 5mg tablet three times daily, starting three days before your expected period. Continue daily until you wish your period to start, up to a maximum of 17 days.

Clinical evidence: Norethisterone is an established treatment for menstrual postponement with decades of clinical use. Success rates vary, but most women successfully delay their period when treatment is taken correctly and started on time. However, breakthrough bleeding can occur in some patients, and postponement cannot be guaranteed.

Who Is This Service Suitable For?

Period delay treatment may be appropriate if you:

Are aged 16 or over
Have a predictable menstrual cycle and know when your period is due
Wish to postpone menstruation for a specific occasion lasting up to 17 days
Have no contraindications to norethisterone (see exclusion criteria below)
Have a BMI below 35
Do not have significant risk factors for venous thromboembolism (blood clots)
Are not taking the combined oral contraceptive pill (COC)

Who Should NOT Use Period Delay Treatment?

Norethisterone is not suitable if you have:

Blood clot risk factors:

Personal history of deep vein thrombosis (DVT), pulmonary embolism, or other thromboembolic events
Strong family history of blood clots (first-degree relatives with VTE before age 45)
Known thrombophilia (inherited clotting disorder)
BMI above 35 (obesity increases VTE risk)
Limited mobility, wheelchair use, or prolonged immobilisation
Recent major surgery or significant trauma

Cardiovascular and metabolic conditions:

High blood pressure (particularly uncontrolled hypertension)
History of heart attack, stroke, or arterial disease
Migraine with aura (increases stroke risk with progestogens)

Hormonal and reproductive conditions:

Pregnancy or suspected pregnancy (norethisterone is contraindicated in pregnancy)
Breastfeeding
Current or previous breast cancer
Undiagnosed vaginal bleeding (requires investigation before hormone treatment)
Genital tract cancers (endometrial, cervical, ovarian)
Severe liver disease

What If I'm Already Taking Contraception?

Combined Oral Contraceptive Pill (COC)

You do NOT need norethisterone if you take a combined pill containing both oestrogen and progestogen. You can delay your period by simply starting your next pill pack immediately without taking the usual 7-day hormone-free break (or skipping the placebo pills in a 28-day pack).

How to do this safely:

Finish your current active pill pack
Start the next pack immediately the following day
Skip the 7-day break or placebo pills
Your period will be delayed until you take a hormone-free break

This method is safe when done occasionally. Do not take norethisterone alongside the combined pill – this is unnecessary and increases progestogen exposure without additional benefit.

Progestogen-Only Pill (POP) – Desogestrel

If you take desogestrel (common brands: Cerazette, Cerelle), norethisterone is not recommended. Both are progestogen-only medications, and taking them together results in progestogen overload, which may increase side effects (bloating, mood changes, headaches) and cardiovascular risks without improving menstrual control.

Many women taking desogestrel experience irregular bleeding or no periods at all. If you have problematic bleeding patterns on desogestrel and wish to control timing for an event, discuss alternative contraceptive options with your GP or sexual health service rather than using norethisterone.

What Happens During Your Consultation?

Your period delay consultation includes:

Menstrual history – Cycle regularity, expected period date, previous experience with period delay or hormonal treatments
Medical history screening – Blood clot risk factors, cardiovascular conditions, liver disease, migraines, breast or reproductive cancers
Medication review – Current contraception, prescription medications, over-the-counter drugs, herbal supplements (particularly St John's Wort)
Risk assessment – BMI calculation, blood pressure measurement (if indicated), mobility status
Contraception counselling – Confirming you understand norethisterone is not a contraceptive and discussing reliable contraception if needed
Treatment explanation – How to take norethisterone, when to start, expected outcomes, and what to do if things go wrong.
Side effect discussion – Common side effects and when to seek medical attention
Prescription and supply – Issuing the appropriate quantity of norethisterone tablets with written instructions

The online consultation typically takes 5 to 10 minutes to complete.

How Do I Take Norethisterone?

Dosing:

One 5mg tablet three times daily (morning, afternoon, evening)
Start 3 days before your expected period
Continue daily until you wish your period to start
Maximum duration: 17 days (approximately 3 weeks)

Example: If your period is due on Saturday 15th, start taking norethisterone on Wednesday 12th. Continue taking it daily until you wish to stop. Your period will typically begin 2-3 days after your last tablet.

Important timing: Starting norethisterone later than 3 days before your expected period may not be effective. If your period has already started, norethisterone will not stop it.

After stopping: Your next period after the delayed one may arrive slightly earlier or later than expected. Your cycle should return to its usual pattern within 1-2 months.

What Are the Side Effects?

Most side effects are mild and resolve after stopping treatment:

Common (more than 1 in 10 women):

Breast tenderness or discomfort
Headache
Nausea
Bloating and fluid retention
Mood changes (low mood, irritability, anxiety)

Less common:

Breakthrough bleeding or spotting (despite taking norethisterone)
Acne or skin changes
Fatigue
Reduced libido

Rare but serious:

Blood clots (deep vein thrombosis, pulmonary embolism) – risk increased in women with underlying risk factors
Allergic reaction (rash, facial swelling, difficulty breathing)

These serious side effects are rare in women without pre-existing risk factors using norethisterone short-term. However, progestogens carry a small VTE risk, which is why thorough screening is essential.

What If Norethisterone Doesn't Work?

Norethisterone is effective for most women when taken correctly, but breakthrough bleeding can occur in approximately 10-20% of users. This may present as:

Light spotting during treatment
Heavier bleeding before the expected delay period
Early onset of full menstruation despite continued tablets

If breakthrough bleeding occurs:

Continue taking norethisterone as prescribed – stopping may trigger heavier bleeding
Use sanitary protection as needed
Be reassured – breakthrough bleeding does not indicate a safety concern

Breakthrough bleeding is more common in women with:

Irregular menstrual cycles
Very heavy or prolonged periods
Previous unsuccessful period delay attempts
Concurrent medications that interact with norethisterone

We cannot guarantee period postponement will be successful. Individual hormonal variation means some women do not respond adequately to norethisterone despite correct usage.

Service Pricing

Period delay consultation and treatment: £20-30 (depending on quantity of packs needed for treatment)

This includes:

Full clinical consultation and risk assessment
Prescription by independent prescriber pharmacist
Supply of norethisterone tablets (sufficient for up to 17 days treatment)

Payment is required at the time of service.

How Do I Book?

To book your period delay consultation:

Visit the pharmacy and speak to a team member
Online booking – [CLICK HERE]

Before your appointment:

Calculate when your next period is due (day 1 of your cycle is the first day of bleeding)
Make a list of current medications and medical conditions
Consider your contraceptive method if sexually active
Book at least 1 week before you need to start treatment to allow time for consultation and medication supply.

Important: This service is only available to patients aged 16 and over. If you are under 16, please discuss menstrual concerns with your GP or school nurse.

Location: Hopwoods Pharmacy, Cardiff, serving Cardiff and South Wales communities.

Frequently Asked Questions

Can I use norethisterone regularly every month?

No. Norethisterone is licensed for occasional short-term use only, not as a regular menstrual suppressant. Frequent use increases exposure to progestogen side effects and cardiovascular risks. If you wish to suppress periods long-term, discuss alternative contraceptive methods with your GP (e.g., continuous combined pill use, progestogen implant, hormonal IUS).

Will norethisterone affect my fertility?

No. Norethisterone does not affect long-term fertility. Your normal menstrual cycle should resume within 1-2 months after stopping treatment. However, norethisterone is not a contraceptive – you can still become pregnant while taking it, so reliable contraception is essential if you are sexually active.

Can I delay my period by more than 3 weeks?

The maximum licensed duration is 17 days (approximately 3 weeks). Prolonging treatment beyond this increases side effects and cardiovascular risks without clear evidence of continued effectiveness. If you need longer-term menstrual control, alternative strategies should be considered.

What if I forget a dose?

Take the missed dose as soon as you remember if it is within a few hours. If you are close to the next scheduled dose, skip the missed dose and continue as normal – do not double-dose. Missing doses increases the risk of breakthrough bleeding and reduces effectiveness.

Can I drink alcohol while taking norethisterone?

Yes, moderate alcohol consumption does not interact with norethisterone. However, alcohol may worsen side effects such as nausea or headache.

Key Takeaways

✓ Period delay service available at Hopwoods Pharmacy, Cardiff, for adults aged 16+ ✓ Uses norethisterone, a prescription-only progestogen hormone ✓ Can delay periods for up to 17 days (3 weeks maximum) ✓ Not suitable for women with blood clot risk factors, cardiovascular disease, or BMI >30 ✓ Not a contraceptive – reliable contraception required if sexually active ✓ Common side effects include breast tenderness, headache, nausea, bloating ✓ Breakthrough bleeding occurs in 10-20% of users despite treatment ✓ Combined pill users can delay periods without norethisterone by skipping the pill-free break ✓ Do not take norethisterone if using desogestrel (progestogen-only pill) ✓ Start 3 days before expected period for best results ✓ £25 includes consultation, prescription, and treatment supply

Written by Jake Groves (Prescribing Pharmacist)

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