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Combined Oral Contraceptive Pill

Combined Oral Contraceptive Pill

Oestrogen and progestogen together. Highly effective, and there is one question that must always be asked before prescribing.

Hormonal

Microgynon, Rigevidon, Yasmin, Marvelon, Cilest, Lucette

Explained by a GMC-registered GP, not a leaflet

Honest about what we can and cannot prescribe remotely

Side effects given the same weight as benefits

Your NHS records in the room, with your consent

Clinically reviewed by Dr Mohammad Khan · Last reviewed

August 24, 2026

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A 20-minute appointment with a GMC-registered GP for £40. Same-day appointments are usually available, 6am to 10pm, seven days a week.

Private GP care led personally by Dr Mohammad Zubair Khan, GMC 7563469.

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Same-Day Appointments
Sick Notes
Private Prescriptions
Blood Tests
Menopause & HRT
Weight Management
Mental Health
Specialist Referrals
Same-Day Appointments
Sick Notes
Private Prescriptions
Blood Tests
Menopause & HRT
Weight Management
Mental Health
Specialist Referrals

What it is

The combined pill contains an oestrogen and a progestogen. It works chiefly by preventing ovulation, and also by thickening cervical mucus and thinning the womb lining.

Used perfectly it is over 99% effective. In real use — accounting for missed and late pills — effectiveness is around 91%, and that gap is worth knowing when choosing between methods.

The progestogen-only pill is a different medicine with a different risk profile, and is often the right answer where the combined pill is not suitable.

What it is used for

How to take it

One tablet daily. Traditionally 21 days followed by a 7-day break, though continuous or extended regimens — taking packs back to back, or shortening the break to four days — are now recognised as safe and often preferable, because the withdrawal bleed is not medically necessary and shorter breaks reduce the risk of escaping ovulation.

Take it at roughly the same time each day.

If you miss one pill, take it as soon as you remember and carry on — you remain protected. Two or more missed pills requires additional precautions for seven days, and emergency contraception may be needed depending on where you are in the pack.

Vomiting within a few hours, or severe diarrhoea, means the pill may not have been absorbed — treat it as a missed pill.

Need this reviewed or prescribed?

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Side effects

Early and usually settling within three months: nausea, breast tenderness, headaches, mood changes, and breakthrough bleeding.

Longer term: some women report mood change or reduced libido, both of which are legitimate reasons to switch preparation rather than persevere.

The risks in proper context:

  • Blood clots. The combined pill increases the risk of venous thrombosis by roughly two to three times the background rate. That sounds alarming until you note the background rate is very low, and that the risk of a clot in pregnancy is considerably higher than on the pill. It is a real risk that needs weighing, not a reason for blanket avoidance
  • Breast cancer — a small increased risk while taking it, which returns to baseline within about ten years of stopping
  • Cervical cancer — a small increased risk with long-term use
  • It also reduces the risk of ovarian and endometrial cancer, and that protection lasts for decades after stopping. This half of the picture is rarely mentioned

Seek urgent assessment for severe calf pain or swelling, chest pain, breathlessness, severe headache with visual change, or weakness on one side.

Not suitable if

  • You have migraine with aura. This is the single most important question and it is sometimes not asked. Aura means visual disturbance, zigzag lines, blind spots or one-sided numbness before the headache. Combined hormonal contraception is contraindicated because it raises stroke risk further — the progestogen-only pill and other methods remain available
  • You have had a blood clot, or have a known clotting disorder
  • You have had a stroke or heart attack, or have significant cardiovascular disease
  • You are over 35 and smoke
  • You have breast cancer, current or past
  • You have significant liver disease
  • You are within six weeks of giving birth and breastfeeding
  • You have uncontrolled high blood pressure

BMI, age, family history of clots and blood pressure all feed into the assessment rather than being absolute bars.

Interactions and monitoring

Enzyme-inducing drugs reduce effectiveness — some anti-epileptics, rifampicin, and St John's Wort, which people frequently do not mention because it is herbal. Alternative contraception is usually needed.

GLP-1 medicines such as semaglutide and tirzepatide delay stomach emptying and can affect absorption — which matters a great deal given those drugs must not be taken in pregnancy.

Most antibiotics do not reduce effectiveness. This changed years ago and the old advice persists stubbornly. Only enzyme-inducing antibiotics such as rifampicin are an issue.

Monitoring: blood pressure and weight before starting and at review, then annually. No routine blood tests are needed.

Can we prescribe this?

Yes. Contraception is well suited to remote consultation — the assessment is a structured history and a blood pressure reading.

What that involves: a full history against UK Medical Eligibility Criteria, always including the migraine-with-aura question, your blood pressure, BMI, smoking status, family history of clots, and a discussion of what you actually want from a method.

What we would also raise: the combined pill is not the most effective method available. The implant and the coil are considerably more effective in real use because they remove the possibility of missing a dose — and we would say so even though we cannot fit them ourselves. If a long-acting method suits you better, we will refer you rather than prescribe something less effective.

You will need your blood pressure measured. If you do not have a monitor, we will tell you where to get a reading before we prescribe rather than skipping it.

This page is information, not an offer to supply.

Cost and supply

Contraception is free on the NHS across the whole UK — no prescription charge, in England as well as Wales. That includes the combined pill.

You can get it free from your GP surgery or from a sexual health clinic, and sexual health clinics generally do not require you to be registered with them. Many take self-referrals and offer walk-in or online ordering.

We would rather tell you that than take a fee. If the free route works for you, use it.

When paying privately makes sense

  • You cannot get an appointment in a useful timeframe and need continuity now
  • You want an unhurried conversation about which method actually suits you, rather than a repeat of whatever you were started on years ago
  • Your situation has changed — new migraines, rising blood pressure, a new medication — and the pill needs properly reassessing rather than reissuing

Worth knowing

Two brands containing the same hormones at the same doses can differ several-fold in price. If you are paying, ask the pharmacy what the equivalent generic costs.

A 12-month supply is now recommended practice rather than three months at a time, and it is reasonable to ask for it.

Stopping or switching

The combined pill can be stopped at any point without tapering. There is no withdrawal.

Fertility returns quickly — often within the first cycle, and certainly within a few months. The idea that it takes a long time to "get out of your system" is not supported.

If you are stopping and do not want to conceive, you need alternative contraception immediately, not after a break.

What comes back

Whatever the pill was masking. Heavy or painful periods, acne, and irregular cycles typically return over a few months.

That is not the pill having caused a problem — it is the underlying pattern reappearing, and it is worth investigating if it is severe.

When it must be stopped promptly

  • New migraine with aura — visual disturbance, zigzag lines or numbness before the headache. This is an absolute contraindication because of stroke risk, and it is regularly missed
  • Calf pain or swelling, chest pain, breathlessness, or coughing blood — possible clot. Urgent assessment
  • Before major surgery or prolonged immobility, usually four weeks in advance

Switching

Changing brand or to a progestogen-only method is straightforward but timing matters, and getting it wrong leaves a gap in cover. Ask rather than assume — the rules differ depending on what you are switching to.

Common questions

Do I need a break from the pill?

No. There is no medical benefit to a break, and stopping and restarting increases both pregnancy risk and, marginally, clot risk.

The idea persists anyway, and it causes unplanned pregnancies.

Do I have to have a period every month?

No. The monthly bleed on the pill is a withdrawal bleed, not a real period, and there is no health reason to have one.

Continuous or extended regimens are now standard practice and are particularly useful for painful periods, endometriosis and migraine.

How quickly will I get pregnant after stopping?

Often within the first cycle. There is no prolonged delay.

Use another method straight away if you are not trying to conceive.

Will it make me put on weight?

The evidence does not support meaningful weight gain from the combined pill. Some people notice fluid retention early on which settles.

That said, if you feel worse on it, that matters — a different preparation is a reasonable thing to try.

What if I get a migraine with aura?

Stop it and get advice. Aura — visual zigzags, blind spots, or numbness before the headache — combined with the pill raises stroke risk, and it is an absolute reason to change method.

This is the single most important question on this page.

What if I miss a pill?

One missed pill: take it as soon as you remember and carry on. No extra precautions needed.

Two or more missed, or missed in the first week: use condoms for seven days and consider emergency contraception if you have had sex. Check the leaflet or ask — the rules depend on where in the pack you are.

Does antibiotic treatment stop it working?

Most antibiotics do not. That advice changed years ago and is still repeated.

Rifampicin and rifabutin do, and vomiting or severe diarrhoea reduces absorption regardless of the cause.

Does it protect against STIs?

No, not at all. Only condoms do that.

Does it cause cancer?

A small increase in breast and cervical cancer risk while taking it, which falls after stopping, set against a substantial and long-lasting reduction in ovarian and womb cancer risk.

The overall balance is generally favourable, which is rarely explained.

Dr Mohammad Zubair Khan, GMC-registered private GP and founder of Cheshire Clinics

Clinically reviewed by Dr Mohammad Zubair Khan, GMC 7563469

Last reviewed

August 24, 2026

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Questions about our service

How quickly can I be seen?

Same-day access is usually available, from 6am to 10pm, seven days a week. You choose a time that suits you rather than waiting on hold at 8am.

Will I see the same doctor each time?

Yes. Care is led personally by Dr Mohammad Khan, so you are not passed between clinicians. Continuity is the point of a small practice: someone who knows your history and is listening attentively rather than working through a checklist.

Can you see my NHS records?

Yes, with your consent. We can access your Summary Care Record during the consultation, so your current medications, allergies and significant history are in the room. That means fewer questions you have already answered elsewhere, and safer prescribing.

Are you trying to replace my NHS GP?

No. We are not here to replace GPs, only to support them. Your NHS practice remains responsible for your ongoing care, and with your consent we write to them after the consultation. We are useful when you need to be seen sooner, or want more time than a standard appointment allows.

What is included in the appointment?

Twenty unhurried minutes and a comprehensive assessment. A written treatment plan is included, along with any prescription, sick note or referral letter arising from the consultation, at no extra charge.

How much does it cost?

£40 for 20 minutes, self-pay. Membership is optional and never required. Priced for fairness, because we are not here to charge extortionate amounts for access to a doctor.

What does “treatable online” actually mean?

It means the diagnosis can usually be made from your history and photographs, and that treatment can be arranged safely without examining you. Where a condition is not marked treatable online, it is because examination is the diagnosis — listening to a chest, feeling an abdomen, examining an ear or a joint — or because a procedure or device is needed.

Can you prescribe antibiotics?

Yes, where there is a genuine bacterial infection — cellulitis, impetigo, bacterial urine infections, confirmed strep throat. We will also frequently tell you that you do not need one. Most sore throats, coughs, colds and earaches are viral, and an antibiotic gives you the side effects with none of the benefit.

What if the GP cannot help with what I need?

If your problem turns out to be genuinely outside what we can do remotely, the doctor will tell you straight away, point you to the right service, and refund your fee in full. We would rather do that than fill twenty minutes to justify the charge.

What should I do in an emergency?

Call 999 or go to A&E — do not book an online appointment and do not wait for a reply to an email. For urgent problems that are not emergencies, NHS 111 is available 24 hours a day, online or by phone, and can direct you to the right service.

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