Alesse (Levonorgestrel / Ethinyl estradiol) — Patient Information (UK)

Alesse is a combined oral contraceptive (COC) containing two hormones: levonorgestrel and ethinyl estradiol. It is commonly used to prevent pregnancy and may also help with cycle-related symptoms. This page explains how Alesse works, how to take it, what to expect, and important safety information for people in the United Kingdom.

How Alesse works (mechanism of action)

Alesse contains two hormones that work together to prevent pregnancy:

• Prevents ovulation: The combined hormones reduce the natural monthly release of an egg.
• Thickens cervical mucus: This makes it harder for sperm to pass through the cervix and reach an egg.
• Changes the uterine lining: The endometrium becomes less suitable for implantation.

In addition to contraception, some people experience more predictable bleeding patterns and reduced menstrual discomfort when using combined pills. Individual responses can vary.

Pharmacokinetics (how the body absorbs and handles the medicine)

Pharmacokinetics describes what the body does to the medicine (absorption, distribution, metabolism, and elimination). With Alesse, the main points are:

• Absorption: After oral intake, both levonorgestrel and ethinyl estradiol are absorbed through the gastrointestinal tract.
• Peak levels: Hormone levels rise after taking a tablet, with maximum concentrations typically occurring within a few hours.
• Metabolism: The hormones are processed primarily in the liver through metabolic pathways that can be affected by other medicines.
• Excretion: Metabolites are eliminated mainly via urine and bile/feces.
• Steady levels: With daily dosing, hormone levels become more consistent over time; taking pills regularly is important for reliable protection.

If vomiting or severe diarrhoea occurs shortly after taking a tablet, absorption may be reduced, which can affect contraceptive reliability.

Typical use and timing

When and how to start

The best starting approach depends on when you last had sex without contraception, your menstrual cycle timing, and whether you are switching from another method. General timing principles for combined pills include:

• Start within the first days of bleeding for prompt protection (the exact day can influence whether extra contraception is needed).
• Switching from another contraceptive often allows continuity, but timing rules differ by method.
• After a break or missed pills: protection may be reduced; a “backup” method is sometimes needed until pills have been taken consistently again.

How to take Alesse

• One tablet daily, ideally at the same time each day.
• Swallow with water if needed; you can take it with or without food.
• Follow the pack instructions carefully, including any pill-free interval if your pack includes one.

What withdrawal bleeding is like

During a pill-free interval (if included) or during inactive days (if present), many people have a bleed similar to a period. It usually starts a few days after the last active tablet, but bleeding patterns can vary. If you miss tablets or experience unusual bleeding, pregnancy testing may be needed depending on the situation.

Food interactions

Food does not usually affect the absorption of combined oral contraceptives in a clinically significant way. You may take Alesse with food or without food.

However, it is important to consider stomach illness:

• Vomiting soon after taking a tablet may prevent absorption. If vomiting occurs within a few hours of taking Alesse, follow the missed-dose guidance in your patient leaflet and consider using backup contraception.
• Severe diarrhoea can also reduce absorption. If diarrhoea is prolonged, contraceptive effectiveness may be reduced.

Alcohol and medicine interactions

Alcohol

Moderate alcohol intake does not typically reduce contraceptive effectiveness directly. That said, heavy drinking may contribute to forgetting pills, which can increase the chance of contraceptive failure. Also consider your overall health and any liver-related conditions.

Other medicines and interactions

Some medicines can interfere with how Alesse works by affecting hormone metabolism in the liver. The most important interactions usually involve drugs that induce certain liver enzymes, potentially reducing hormone levels and contraceptive effectiveness.

Tell your pharmacist or clinician about all medicines you take, including:

• Enzyme-inducing medicines (examples include some medicines for epilepsy, tuberculosis, and certain herbal products).
• Some antibiotics and antifungals (effects vary by medicine; not all antibiotics reduce COC effectiveness).
• Medicines for HIV and hepatitis C (may affect hormone levels).
• Herbal products, especially St John’s wort, which can significantly lower hormone levels.
• New or short-course medicines started during a pill pack.

If you take interacting medicines, you may need:

• Extra condoms/backup contraception during the course and for a period after stopping, and
• following specific guidance for the particular medicine you’re using.

Indications (what Alesse is used for)

In the UK, Alesse is indicated for:

• Contraception (prevention of pregnancy).
• Some cycle-related benefits may include more regular bleeding patterns and reduced menstrual pain for some individuals. Note that benefits differ from person to person and are not guaranteed.

Dosing (standard regimen)

Alesse is taken orally once daily. The exact dosing schedule (21 active tablets with a break, or another scheme) depends on the specific pack you have. Always use the tablet chart on your packaging.

Missed doses (important timing note)

If you miss tablets or take them late, effectiveness may decrease. The appropriate action depends on how many tablets were missed and where you are in the pack. Always refer to your patient leaflet for detailed instructions.

As general principles:

• Take the most recent missed tablet as soon as you remember.
• Continue taking the next tablets at the usual time.
• Use backup contraception (such as condoms) when advised in the missed-pill guidance.

Safety profile and who should be cautious

Like all combined oral contraceptives, Alesse carries risks. Most people tolerate COCs well, but certain medical conditions require extra caution or alternative methods. This section summarises key safety considerations in a patient-friendly way.

Important warning signs (seek urgent medical help)

Stop taking Alesse and seek urgent medical assessment if you develop signs of serious blood clots or other emergencies such as:

• Sudden shortness of breath or coughing blood
• Chest pain spreading to the arm or jaw
• Severe pain or swelling in one leg
• Sudden weakness or numbness on one side of the body
• Severe headache or vision changes (for example, loss of vision)
• Severe abdominal pain

Risk of blood clots (venous and arterial)

Combined pills slightly increase the risk of blood clots compared with not using a combined method. The risk is still relatively low for most healthy people, but it can be higher if you have certain risk factors.

Increased risk may apply if you:

• Smoke and are older (especially over 35)
• Have a history of blood clots or certain clotting disorders
• Have migraine with aura
• Have high blood pressure or significant heart disease
• Are very overweight (risk increases with higher BMI)
• Have prolonged immobilisation or recent major surgery
• Have certain medical conditions such as uncontrolled diabetes with vascular disease

Other potential side effects

• Nausea, breast tenderness
• Headache (including migraines)
• Changes in bleeding (spotting, irregular bleeding, lighter or absent withdrawal bleeds)
• Mood changes in some people
• Skin changes or increased pigmentation (less common)

Many mild side effects improve after the first couple of pill cycles. If side effects are persistent, severe, or worrying, discuss with a healthcare professional.

Caution in specific conditions

You should ensure clinicians know about relevant history such as:

• Any history of jaundice, liver disease, or liver tumours
• Known hormone-sensitive cancers
• Diabetes, high cholesterol, or hypertension
• Smoking status and age
• Recent childbirth or pregnancy-related complications

Practical use tips for reliable contraception

• Choose a daily routine time (e.g., after breakfast or before bed) to reduce missed doses.
• Use reminders (phone alarms, calendar prompts, pill organiser).
• Keep the pack and follow the tablet chart exactly.
• Carry backup protection (condoms) if you are unwell, taking interacting medicines, or have missed tablets.
• Don’t ignore unusual bleeding after missed pills. If you have missed tablets and no bleed occurs, consider a pregnancy test.
• Plan medication changes: ask about interactions before starting antibiotics, antiepileptics, or herbal supplements.
• If you miss a pill: act quickly and follow the missed-dose instructions in the leaflet for your exact situation.

Alternative options

If Alesse is not suitable (for example, due to side effects, interactions, or personal preference), there are other contraceptive options in the UK, including:

Other combined pills

• Different formulations of combined oral contraceptives (varying progestogens and oestrogen doses).

Progestogen-only methods (often considered when oestrogen is not suitable)

• Progestogen-only pill (POP)
• Contraceptive implant
• Injectable contraception
• Hormonal intrauterine system (IUS)

Non-hormonal methods

• Condoms (also help protect against sexually transmitted infections)
• Copper IUD (non-hormonal long-acting option)

Choice depends on your health profile, preferences, bleeding pattern goals, and interaction risk. If you want alternatives, consider speaking with a pharmacist or family planning service for tailored advice.

UK market and legal context (important notes)

In the United Kingdom, combined oral contraceptives are regulated medicines and are supplied through licensed channels. Availability, pack sizes, and exact formulations can differ by manufacturer and may change over time.

Many people obtain contraception through:

• Community pharmacy supply arrangements
• Family planning services and sexual health clinics
• NHS and other healthcare pathways where appropriate

If you are new to Alesse or switching from another contraceptive, it is important to confirm the correct starting approach and timing based on your individual circumstances and the specific pack instructions.

Recent guidance and practical considerations (UK)

Contraception guidance in the UK continues to emphasise:

• Safety screening for clot risk and contraindications before starting a combined pill.
• Clear missed-pill instructions and prompt action when doses are missed.
• Awareness of medicine interactions, particularly enzyme-inducing drugs and herbal products such as St John’s wort.
• Support for consistent use through reminders and routine-based strategies.

If you are unsure whether a medicine you’re taking may affect Alesse, check with a pharmacist. When in doubt, use backup contraception until you receive confirmation.

Delivery and availability (UK)

Availability of Alesse can vary by supplier and pack type. If you order online, you can typically expect:

• Standard delivery options depending on your location within the UK.
• Packaging that helps protect tablets and includes manufacturer labelling.
• Customer support to confirm stock and help with delivery queries.

Always check that the product name and strength match the intended medicine, and ensure you receive the correct pack format for your dosing chart.

FAQ

1) How quickly does Alesse protect against pregnancy?

Protection depends on when you start relative to your menstrual cycle and whether you have already taken the required tablets consistently. For best reliability, follow the start instructions in the patient leaflet and use backup contraception if your starting day requires it.

2) Can I take Alesse if I miss a period?

Missing a period can happen for several reasons, including stress, illness, or irregular bleeding—especially if pills were missed or taken late. If you have missed pills or bleeding is unusual, consider taking a pregnancy test to be safe. If pregnancy is a possibility, seek advice promptly.

3) What should I do if I vomit after taking Alesse?

Vomiting soon after taking a tablet may prevent absorption. Follow the missed-dose guidance in your patient leaflet. In general, you may need to take another tablet and use backup contraception for a period—depending on timing.

4) Does Alesse affect fertility after stopping?

Most people return to normal fertility after stopping combined oral contraception, though timing varies. If you plan pregnancy, discuss your plans with a healthcare professional.

5) Can I take Alesse with antibiotics?

Many antibiotics do not significantly reduce effectiveness, but some medicines can. The most reliable approach is to check with a pharmacist when you are prescribed a new antibiotic, especially if it is for a short course or if you are also taking other medicines that may interact.

6) Is Alesse safe for everyone?

Not everyone can use combined oral contraception. People with certain clotting risk factors, migraine with aura, uncontrolled high blood pressure, certain liver conditions, or other contraindications may need an alternative method. If you’re unsure, ask a pharmacist or clinician for a safety check.

7) Will Alesse make me gain weight?

Weight changes can occur for many reasons, and COCs are not a guaranteed cause. Some people report changes in appetite, fluid retention, or mood, while others see no change. If you notice rapid or concerning changes, speak with a clinician.

8) What side effects are common in the first months?

Common early effects include nausea, breast tenderness, headaches, and irregular bleeding/spotting. These often improve after the first 2–3 cycles. Persistent or severe symptoms should be reviewed.

9) Can I use Alesse during breastfeeding?

This depends on individual circumstances. Combined pills are generally not the first choice immediately after childbirth. If you are breastfeeding or recently had a baby, seek tailored advice about the most suitable contraceptive option.

10) What should I do if I have severe headache or migraine symptoms?

Severe headaches—especially if new, worsening, or associated with visual symptoms—should be assessed promptly. If you develop migraine with aura or symptoms suggestive of a clot, seek urgent medical care.

Key takeaways

• Alesse is a combined oral contraceptive containing levonorgestrel and ethinyl estradiol.
• It works mainly by preventing ovulation, thickening cervical mucus, and changing the uterine lining.
• Take one tablet daily at the same time for reliable effectiveness.
• Vomiting/diarrhoea and drug interactions can affect effectiveness—consider backup contraception when appropriate.
• Be aware of serious warning signs such as symptoms of blood clots and seek urgent help if they occur.