Dydrogesterone (Dydrogesterone) — Patient Information for the UK

Dydrogesterone is a medicine used to treat certain hormone-related conditions in women by replacing the progesterone effect in the body. It is commonly prescribed to support the uterine lining and to help manage symptoms connected with progesterone deficiency.

This guide explains what dydrogesterone is, how it works, how it is taken, what to expect, and important safety information—written in a clear, patient-friendly way for people in the United Kingdom.

Basic Product Information

Important: Dydrogesterone is not the same as the hormone natural progesterone, and dosing schedules depend on the condition being treated. Always follow the specific regimen provided for you.

How Dydrogesterone Works (Mechanism of Action)

Dydrogesterone is a progestogen. In the body, it acts similarly to progesterone by binding to progesterone receptors.

• Supports and regulates the endometrium (uterine lining): It helps stabilise the uterine lining and ensures it develops and sheds in a controlled way.
• Helps control abnormal bleeding linked to hormone imbalance: By providing progesterone activity, it can reduce irregular or excessive bleeding caused by an imbalance between oestrogen and progesterone.
• Assists hormone therapy plans: In women who take oestrogen therapy, dydrogesterone may be used to protect the endometrium from the effects of unopposed oestrogen.
• May support early pregnancy in selected circumstances: In certain clinical situations, progesterone support can be used during early pregnancy, as advised by healthcare professionals.

Pharmacokinetics (What the Body Does to the Medicine)

Pharmacokinetics describes how the body absorbs, distributes, metabolises, and eliminates a medicine. While exact figures can vary between studies and individual patients, key features include:

• Absorption: Dydrogesterone is absorbed after oral administration.
• Metabolism: It is largely metabolised in the body, primarily via pathways in the liver.
• Main metabolite: The principal metabolite is dihydrodydrogesterone, which contributes to the medicine’s overall activity.
• Elimination: Metabolites are excreted mainly through the kidneys.
• Half-life: Dydrogesterone is converted to metabolites that are eliminated over time. This is one reason it can be taken in scheduled doses rather than continuously.

If you have kidney or liver conditions, it is especially important to discuss suitability with a clinician, because metabolism and clearance can be affected.

Typical Uses in the UK

Dydrogesterone is used for conditions where progesterone action is needed. Common “typical uses” include:

• Abnormal uterine bleeding related to hormone imbalance (for example, irregular bleeding due to insufficient progesterone activity).
• Protection of the uterine lining when oestrogen is used as part of hormone therapy.
• Endometriosis (as part of a hormone strategy to reduce symptoms).
• Prevention of endometrial hyperplasia or excessive thickening linked to oestrogen exposure.
• Threatened or recurrent miscarriage in selected clinical settings where progesterone support is considered appropriate.
• Hormonal support in reproductive planning, depending on individual diagnosis and treatment plan.

Note: The precise indication and dosing schedule vary widely. Your regimen should be tailored to your specific diagnosis, cycle stage, and overall treatment goals.

When and How to Take It (Timing & Practical Use)

Correct timing helps maintain consistent hormone levels in the body. Your prescriber may choose a schedule based on your condition—for example, a certain number of days per menstrual cycle or multiple daily doses.

General timing guidance

• Take at the times advised (e.g., morning/evening or specific days of the cycle).
• Try to keep a consistent schedule each day.
• Use a routine such as linking doses to meals or brushing teeth to avoid missed doses.

If you miss a dose

If you forget a dose, follow the advice given with your medicine. In general:

• Do not double the next dose to make up for a missed one.
• Take the missed dose only if it is close to the time you normally would, unless your clinician/pharmacist advises otherwise.
• If you are unsure, ask your pharmacist for advice based on your dose schedule.

Food Interactions

Dydrogesterone can generally be taken regardless of meals.

• Food usually does not significantly reduce effectiveness.
• Some people find taking it with food helps reduce stomach discomfort.

If your product leaflet or prescriber provides specific instructions (for example, “take after food”), follow those instructions.

Alcohol and Medicine Interactions

There is no universal “no alcohol” rule for dydrogesterone, but alcohol can affect how you feel and can complicate treatment if you experience side effects (such as dizziness, fatigue, or mood changes).

Alcohol considerations

• Limit alcohol while you are taking hormone medicines.
• If you feel unwell, delay alcohol until you know how dydrogesterone affects you personally.
• Do not mix alcohol with other medicines that cause drowsiness without medical advice.

Other medicines

Some medicines can alter hormone metabolism, potentially affecting levels of dydrogesterone. Examples include certain treatments for:

• Epilepsy (anti-epileptic medicines)
• Tuberculosis (rifamycins)
• HIV (certain antiretrovirals)
• Fungal infections (some azole antifungals)
• St John’s wort (a herbal remedy)

Always tell your pharmacist or clinician about all medicines, including over-the-counter products and herbal supplements.

Indications (Conditions Treated)

Below is an overview of typical indications for dydrogesterone. Your own treatment may fit more than one category.

• Hormone replacement support (HRT regimens): To provide progesterone effect where oestrogen therapy is used, reducing risk related to unopposed oestrogen.
• Irregular or abnormal uterine bleeding: When bleeding pattern problems are linked to insufficient progesterone.
• Endometriosis: As part of hormonal management to reduce symptoms and disease activity.
• Prevention of endometrial hyperplasia in situations where oestrogen would otherwise be unopposed.
• Reproductive health support: Depending on the individual clinical scenario, progesterone support may be considered.

Reminder: Indications and dosing schedules must be confirmed for your exact diagnosis.

Dosing (How Much and How Often)

Dosing depends on the condition being treated, your symptoms, and your treatment cycle. Common regimens may include different frequencies and durations.

Typical dosing patterns (examples)

Because dosing varies, the table below provides general patterns rather than personalised instructions. Always follow the dose written on your medicine label and the specific plan provided by your clinician.

How to take tablets correctly

• Swallow tablets with water.
• Take doses at the same times each day when possible.
• Do not stop early without advice—stopping suddenly can affect bleeding patterns or symptom control.

If you are unsure about the schedule, ask your pharmacist to help you confirm how many tablets to take and on which days.

Safety Profile (Side Effects & Warnings)

Like all medicines, dydrogesterone can cause side effects. Many people tolerate it well, but it is important to know what to watch for.

Common side effects

• Headache
• Nausea or stomach discomfort
• Mood changes (for example, feeling emotional or changes in mood)
• Breast tenderness
• Irregular bleeding or spotting (especially early in treatment)
• Vaginal discomfort or discharge changes (varies by patient)

Less common but important risks

Although dydrogesterone is a progesterone-like hormone, any hormone medicine can carry risks for some individuals. Speak to a clinician promptly if you develop new or worsening symptoms.

• Signs of allergic reaction (rash, itching, swelling of face/lips, trouble breathing)
• Severe headaches or migraine-like symptoms that are new or significantly worse
• Breast lumps or persistent breast changes
• Unusual bleeding that is heavy, persistent, or concerning
• Yellowing of the skin or eyes (jaundice) or dark urine—could indicate liver issues

Seek urgent help

Get emergency medical help if you experience symptoms that could suggest a serious blood clot or severe reaction, such as:

• Chest pain or shortness of breath
• Sudden weakness or numbness on one side of the body
• Severe leg pain or swelling
• Fainting or severe dizziness

Who should be extra cautious?

Tell a clinician if you have or have had:

• Serious liver disease
• A history of hormone-sensitive cancers (such as certain breast or genital cancers)
• Unexplained vaginal bleeding
• A history of blood clots
• Porphyria or severe migraine with specific patterns

Practical Use Tips

• Keep a cycle diary: Recording bleeding/spotting days and symptoms can help your clinician adjust your plan.
• Use reminders: Phone alarms, pill organisers, or medication apps can reduce missed doses.
• Track side effects: Note timing (e.g., after starting, after a dose change) and severity.
• Don’t share medicines: Hormone treatments are individualised.
• Review other medicines regularly: Some interactions may occur when you start new treatments.

Alternative Options

If dydrogesterone is not suitable, there may be other progesterone or progestogen options depending on the condition and personal circumstances. Alternatives can include:

• Other progestogens used for abnormal bleeding, endometriosis, or hormone therapy regimens.
• Micronised progesterone (used in some reproductive support plans).
• Levonorgestrel-containing methods for certain uterine bleeding problems (depending on diagnosis).
• Non-hormonal management where appropriate (for example, pain management strategies for endometriosis symptoms).

The “best” alternative depends heavily on the reason you are taking dydrogesterone. Your clinician can explain what options fit your diagnosis, age, and medical history.

Market & Legal Context (United Kingdom)

In the UK, medicines are regulated by the Medicines and Healthcare products Regulatory Agency (MHRA) and authorised medicines must have an approved product information summary, including safety information and dosing guidance.

Pharmacies in the UK follow legal and professional standards for supply, patient counselling, and ensuring the medicine is appropriate and safe for the person receiving it.

Because hormone medicines can be used for multiple indications, you may notice differences in how they are supplied or discussed depending on the treatment context. Your pharmacy will provide label instructions and written information for your specific product.

Recent Guidance & Ongoing Considerations

In the UK, clinical practice guidance can evolve as new evidence becomes available. For hormone-related conditions, guidance often focuses on:

• Appropriate selection of progestogen type and dose for the underlying diagnosis
• Reviewing benefits versus risks in individual patients
• Ensuring endometrial protection when oestrogen therapy is used in women with a uterus
• Monitoring bleeding patterns and responding to unexpected symptoms

If you are taking dydrogesterone as part of a longer-term plan, it’s a good idea to attend scheduled reviews and to report any changes in symptoms promptly.

Delivery & Availability in the UK

Availability can vary by brand, strength, and pharmacy supplier. Many online pharmacies in the UK may offer delivery options such as standard or expedited shipping, depending on stock levels and your location.

What to expect

• Stock checks: Some orders are dispatched after confirming availability.
• Delivery times: Times vary by service and postcode area; your order confirmation typically shows an estimated delivery window.
• Packaging: Medicines are supplied in manufacturer packaging with appropriate labelling.

Storage

Follow the storage instructions on the outer packaging or patient information leaflet. In general:

• Store in a safe, dry place.
• Keep out of the reach of children.
• Check whether refrigeration is required (most tablet formulations do not require refrigeration).

Frequently Asked Questions (FAQ)

1. What is dydrogesterone used for?

Dydrogesterone is used to provide progesterone-like effects in situations such as abnormal uterine bleeding related to hormone imbalance, endometrial protection during oestrogen therapy, endometriosis management, and selected reproductive health scenarios as advised by clinical guidance.

2. How long does it take to work?

Some people notice improvements in bleeding patterns within the first course or cycle. For others, symptom improvement may take longer and depends on the underlying cause and dosing schedule. If you do not see expected benefits, speak to your pharmacist or clinician.

3. Can I take dydrogesterone with food?

Food is generally not a major issue. However, follow the specific instructions provided with your product. Taking it with food may help reduce stomach discomfort for some people.

4. What should I do if I miss a dose?

Check the guidance in your patient information leaflet. In general, don’t double up to compensate. If you’re unsure, ask your pharmacist for advice tailored to your dosing days and strength.

5. Is it safe to drink alcohol while taking dydrogesterone?

Moderate alcohol may be possible, but it’s safest to limit alcohol and avoid excess. If alcohol makes side effects worse (such as dizziness or nausea), reduce intake and seek advice if needed.

6. Are there interactions with other medicines?

Some medicines and supplements can affect hormone metabolism (for example, certain anti-epileptics, rifamycin antibiotics, some HIV medicines, some antifungals, and St John’s wort). Tell your pharmacist about everything you take.

7. What side effects are most common?

Common side effects can include headache, nausea, mood changes, breast tenderness, and spotting or bleeding changes. Report persistent or bothersome symptoms.

8. When should I stop dydrogesterone and contact a clinician urgently?

Contact urgent care or emergency services if you develop signs of serious allergy, blood clot symptoms (such as chest pain, sudden shortness of breath, severe leg swelling), or jaundice. For non-urgent concerns (e.g., persistent unexpected bleeding), seek prompt medical advice.

9. Can I use it during pregnancy?

Dydrogesterone may be used in selected early pregnancy circumstances based on clinical assessment. Follow your clinician’s plan and the product-specific information provided with your medicine.

10. Are there alternatives to dydrogesterone?

Yes. Alternatives may include other progestogens or different hormonal/non-hormonal strategies depending on your condition. A clinician can advise the most suitable option for your diagnosis and personal risk profile.

Key Takeaways

• Dydrogesterone is a progesterone-like medicine used for conditions linked to progesterone deficiency and to support the uterine lining.
• It works by binding progesterone receptors and helping regulate the endometrium.
• Dosing schedules vary by indication—follow your specific timetable closely.
• Food usually does not significantly change effectiveness, but follow product instructions.
• Tell your pharmacy about other medicines and supplements to reduce interaction risk.
• If you experience serious side effects or symptoms that concern you, seek urgent medical advice.

For the safest experience: Keep the patient information leaflet with your medicine, and if you have questions about your schedule, interactions, or side effects, speak to your pharmacist.