Cycrin (Medroxyprogesterone) — Patient Information

Cycrin contains medroxyprogesterone, a synthetic form of the hormone progesterone. It is used in a range of hormone-related conditions and treatment plans, depending on your individual needs and clinical history.

This guide is designed to be easy to read and helpful. It explains how Cycrin works, how it behaves in the body, what it’s used for, typical dosing principles, important safety information, and practical tips for using it effectively in the United Kingdom.

Key product information

Note: Strengths, dosing schedules, and treatment durations vary. Always follow the instructions provided with your specific product and your healthcare plan.

How Cycrin works (mechanism of action)

Medroxyprogesterone is a progestogen. In the body it helps balance the effects of oestrogen on the reproductive system.

• Adjusts the uterine lining: Progestogens make the endometrium (the lining of the womb) less likely to overgrow. This can help treat or prevent problems related to abnormal growth and bleeding.
• Influences ovulation and menstrual patterns: It can alter hormone signals involved in the menstrual cycle, which may reduce irregular bleeding for some people.
• Supports hormone therapy when oestrogen is used: When oestrogen is prescribed (for example, in menopausal hormone therapy), adding a progestogen protects the endometrium from excess stimulation.
• May reduce endometriosis-related symptoms: By affecting hormone-driven activity, it can help relieve pain and other symptoms associated with endometriosis.

Pharmacokinetics: what happens in the body

Pharmacokinetics describes how the medicine is absorbed, distributed, metabolised, and eliminated.

• Absorption: After oral dosing, medroxyprogesterone is absorbed through the gastrointestinal tract. Food may influence the speed/extent of absorption slightly, but the medicine is generally taken as directed regardless of meals.
• Distribution: It distributes throughout the body and binds to blood proteins, which helps determine how it travels to target tissues.
• Metabolism: Medroxyprogesterone is mainly metabolised by the liver.
• Elimination: Metabolites are eliminated primarily via the urine and/or bile. The medicine’s overall activity can last beyond a single dose because of how the body processes hormones.
• Half-life (general concept): Hormonal medicines often have a biological duration that supports once-daily or scheduled dosing. The exact timeframe varies by formulation and individual factors.

Practical takeaway: Because the medicine is processed by the liver and binds to proteins, consistency matters—taking it at the same time each day (or as scheduled) helps maintain stable hormone levels.

What Cycrin is used for (indications)

Cycrin may be used for hormone-related conditions. Common indications (depending on your clinician’s assessment and the specific product strength/regimen) can include:

• Abnormal uterine bleeding associated with hormonal imbalance (such as irregular or heavy bleeding patterns in certain circumstances).
• Endometriosis to help reduce symptoms such as pelvic pain and painful periods.
• Uterine protection during oestrogen therapy in people who have a uterus and require oestrogen as part of hormone therapy.
• Other progestogen-responsive conditions as determined by specialist assessment.

Important: Not everyone with abnormal bleeding needs Cycrin. Persistent or heavy bleeding should be reviewed to rule out causes such as pregnancy, infection, polyps, or malignancy.

When you might start to feel effects (timing)

The timing of benefit depends on the reason you’re taking Cycrin:

• Abnormal uterine bleeding: Some people notice changes within days to a few weeks. For others, improvement can take longer, especially if the bleeding pattern is complex.
• Endometriosis-related pain: Symptom relief may take several weeks. Ongoing assessment is important.
• Uterine protection in hormone therapy: Protection is achieved through using the medicine as part of the planned regimen with oestrogen.

Keep expectations realistic: If you experience spotting or irregular bleeding during the first stages of treatment, this can occur—however, new or worsening symptoms should be discussed promptly.

Dosing: typical approaches

Dosing with Cycrin depends on the condition being treated, your age, your response, and whether you’re using it as a continuous or cyclic regimen.

General guidance (not a substitute for your specific plan):

• Take it at the same time each day if you’ve been given a daily schedule.
• Follow the exact regimen (continuous vs cyclical) that applies to your indication.
• Do not change the dose or stop early without advice, because bleeding patterns and symptom control can shift.

Missed dose:

• If you forget a dose, take it as soon as you remember unless it’s close to your next dose.
• Do not take two doses together to make up for a missed tablet.

If you’re unsure: Check the patient leaflet supplied with your Cycrin product or ask a pharmacist for guidance.

Food interactions

Medroxyprogesterone can generally be taken with or without food. Food may affect absorption slightly, but it’s typically not necessary to take Cycrin at a specific time relative to meals.

• Consistency helps: Choose a time you can manage daily (for example, with breakfast or in the evening) and stick to it.
• Gastrointestinal effects: Some people feel nausea or have mild stomach discomfort. Taking the tablet with food may improve tolerability.

Seek advice if you experience severe vomiting or diarrhoea, as this can reduce absorption and affect your treatment effect.

Alcohol and medicine interactions

There is no single “universal” alcohol rule for everyone taking medroxyprogesterone. However, alcohol may:

• Increase feelings of dizziness or drowsiness in some people.
• Worsen stomach upset or overall side effects.
• Place extra strain on the liver—and medroxyprogesterone is metabolised by the liver.

Practical approach: If you drink alcohol, consider keeping it moderate and avoid binge drinking. If you have liver disease or a history of significant liver problems, discuss alcohol with your healthcare team before using Cycrin.

Medicine interactions (including common interacting medicines)

Some medicines can affect how medroxyprogesterone is metabolised, potentially changing its effectiveness or side-effect profile.

Tell your pharmacist or clinician about all medicines and supplements you take, including over-the-counter products.

• Enzyme-inducing medicines: Some medicines that accelerate liver metabolism may reduce the effectiveness of hormonal treatments.
• Medicines affecting liver enzymes: Drugs that alter hepatic metabolism can influence hormone levels.
• Herbal products: For example, St John’s wort may affect metabolism of many medicines.
• Anticoagulants and antiplatelet therapy: Hormonal medicines can interact indirectly through effects on clotting risk; your clinician may advise monitoring or a different plan.

Important: Never start or stop medicines (including herbal remedies) without checking for interaction risk.

Safety profile: what to watch for

Like all medicines, Cycrin can cause side effects. Many are mild and improve with time, but some require urgent medical attention.

Common side effects

• Irregular bleeding or spotting, particularly early in treatment
• Breast tenderness
• Headache
• Nausea or stomach discomfort
• Mood changes (such as mood swings)
• Fluid retention or a feeling of bloating
• Changes in libido

Less common but important risks

• Blood clots (thrombosis): Hormone medicines can be associated with an increased risk of blood clots in some circumstances. Risk may be higher if you smoke, have certain clotting disorders, are immobile, or have other risk factors.
• Liver effects: Rarely, serious liver problems can occur. Seek advice if you notice yellowing of the eyes/skin (jaundice), dark urine, or severe abdominal pain.
• Changes in glucose or lipid control: Some people may experience effects on metabolic parameters.
• Endometrial changes: Because this medicine affects the uterine lining, any unusual or persistent bleeding should be assessed.

Seek urgent medical help if you notice

• Signs of a blood clot: sudden shortness of breath, coughing blood, chest pain, swelling/pain in one leg, or sudden weakness/numbness (including facial drooping or trouble speaking).
• Severe allergic reaction: swelling of the face/lips, trouble breathing, or widespread rash.
• Severe liver symptoms: jaundice, severe upper abdominal pain, persistent vomiting.

Practical use tips (how to take Cycrin smoothly)

• Use reminders: A daily alarm can help you avoid missed doses and maintain consistent hormone levels.
• Keep a symptom diary: Note bleeding pattern, pain levels (if taking for endometriosis), and side effects, especially during the first 1–3 months.
• Don’t ignore heavy or unusual bleeding: If bleeding is very heavy, lasts longer than expected, or suddenly changes, contact your healthcare provider.
• Regular reviews matter: Hormone treatments often benefit from periodic reassessment to confirm the chosen regimen is still appropriate.
• Bone health and long-term use: Some progestogens are associated with effects on bone density when used for long periods; your clinician may advise monitoring depending on the planned duration and your risk factors.
• Inform other clinicians: If you are visiting other healthcare services (dentist, GP, emergency department), mention that you take Cycrin.

Who should use caution?

You should seek personalised advice before using Cycrin if you have (or have had):

• Current or past blood clot or clotting disorder
• Liver disease or past significant liver problems
• Unexplained vaginal bleeding
• Breast cancer or suspected breast cancer
• Severe migraine or neurological symptoms (your clinician can assess suitability)
• Conditions that increase risk factors for clotting (for example, prolonged immobility)

This is not exhaustive. Your pharmacist or healthcare professional can help determine whether Cycrin is suitable for you.

Alternative options

Depending on the reason you’re taking Cycrin, alternative treatments may include:

• Other progestogens (different formulations or active ingredients)
• Combined or oestrogen-progestogen strategies for menopausal symptoms when appropriate (with uterus-protective planning)
• Hormone-releasing intrauterine systems (for uterine protection and abnormal bleeding in selected cases)
• Non-hormonal treatments for pain or bleeding symptoms (depending on diagnosis)
• Surgical or procedural options in some cases (for example, fibroid-related symptoms)

Best next step: Your clinician can compare options based on your symptoms, medical history, and preferences.

Market and legal context in the United Kingdom

In the UK, medicines are regulated by the Medicines and Healthcare products Regulatory Agency (MHRA) and must follow rules for supply, labelling, and patient information. Medicines like Cycrin are supplied in line with UK prescribing and dispensing practices, including appropriate patient-facing documentation (such as the Summary of Product Characteristics and patient information leaflet) and regulatory standards for safe use.

Pharmacy availability: Product availability can vary by pharmacy and stock levels. Online pharmacies typically provide access to medicines subject to regulatory requirements, verification processes, and eligibility criteria.

Recent guidance and practice updates: Hormone therapies are periodically reviewed as new safety data emerges. In the UK, clinicians consider current evidence and guidance from relevant professional bodies when balancing symptom control with potential risks (including clotting risk). If you are starting or switching hormonal treatment, it’s a good idea to discuss your risk factors and any recent changes in your health.

Delivery and availability (UK)

Online pharmacies in the UK commonly offer home delivery options. Availability depends on:

• Stock status at the time of order
• Strength and pack size you select
• Delivery location within the UK
• Dispensing lead times (particularly for less commonly stocked variants)

Delivery expectations: Many services offer standard and express delivery where available. Delivery timeframes should be shown at checkout or on the pharmacy’s delivery information page. If you need your medicine urgently, check current dispatch times before ordering.

Storage: Keep tablets in their original packaging, protected from excessive heat and moisture. Store out of sight and reach of children.

FAQ — Cycrin (medroxyprogesterone)

1) How do I take Cycrin?

Take Cycrin exactly as advised by your healthcare plan and the instructions provided with your specific product. If your regimen is daily, aim to take it at the same time each day. If you’re on a cyclical schedule, follow the calendar-like plan exactly.

2) What should I do if I miss a dose?

Take it as soon as you remember unless it is nearly time for your next dose. Do not take two doses at the same time. If you’re unsure, contact your pharmacist for advice specific to your schedule.

3) Can I take Cycrin with food?

Yes, it’s usually possible to take medroxyprogesterone with or without food. If you experience nausea, taking it with a meal may help.

4) Will Cycrin affect my period?

It can. Irregular bleeding and spotting may occur, particularly at the start. Over time, bleeding patterns may become more predictable depending on why you are taking it. Any heavy or persistent bleeding should be reviewed.

5) How long does it take to work?

Some people notice changes within days to weeks, but it may take longer—especially for endometriosis symptoms. If you don’t see improvement after a reasonable period, discuss this with your clinician.

6) Is it safe to drink alcohol?

Moderate alcohol consumption may be acceptable for many people, but alcohol can worsen side effects such as dizziness, stomach upset, or mood changes. If you have liver disease or other risk factors, ask for personalised advice.

7) What medicines can interact with Cycrin?

Some medicines that affect liver metabolism (including certain anti-epileptics and herbal products such as St John’s wort) may change hormone levels. Tell your pharmacist about all medicines and supplements you use.

8) When should I seek medical help urgently?

Seek urgent care for symptoms suggestive of blood clots (such as sudden shortness of breath, chest pain, or one-sided leg swelling), severe allergic reactions, or serious liver symptoms (such as jaundice or severe upper abdominal pain).

9) Are there alternatives to Cycrin?

Depending on your condition, alternatives may include other progestogens, hormone-releasing intrauterine options, or non-hormonal therapies. Your clinician can recommend the most suitable option for your diagnosis and risk profile.

10) How should I store Cycrin?

Store tablets in their original packaging, away from heat and moisture, and out of the reach of children.

Disclaimer: This page provides general information about Cycrin (medroxyprogesterone) for people in the UK. It cannot replace personalised medical advice. If you have concerns about side effects, interactions, or suitability for your individual situation, speak to a qualified healthcare professional or pharmacist.