Buserelin (Suprefact)

At a glance

Buserelin is a medicine used in specialist cancer care. Brand names include Suprefact. The practical instructions depend on the exact prescription and product supplied.

Your prescription and the instructions for your own product take priority over a general guide. Keep the medicine leaflet as well as your treatment plan, especially if the brand or formulation changes.

You do not need to remember every possible side effect. Start with the administration instructions and the section on urgent help. Most people experience only some of the effects described here. Tell your team about difficulties early: supportive treatment, a planned pause or a different medicine may make treatment easier to continue.

How it works

Buserelin is a gonadotropin-releasing hormone (GnRH) agonist that suppresses testosterone after an initial stimulation of hormone release. In oncology it may begin as short-acting injections and continue as a nasal spray. Its nasal route makes consistent technique and repeated daily dosing especially important.

Is this treatment suitable for me?

The team selects buserelin according to the cancer plan and whether its injection or nasal schedule is practical for you. A short-term androgen-receptor blocker is recommended around the start to reduce the chance of troublesome flare. This is separate from buserelin itself.

Your oncologist considers the biology of the cancer, treatments already received, other illnesses and your preferences. The aim may be to reduce the chance of cancer returning, control cancer that is present, or relieve symptoms. Ask which aim applies to you and how benefit will be assessed. The same medicine can be used for different lengths of time in different treatment plans.

A brand name alone does not tell you whether a medicine is suitable. The dose, formulation and other medicines in the plan also matter. Discuss the possible benefits and risks with your care team.

This guide concerns Suprefact for hormone-dependent prostate cancer. It is not used after surgical removal of both testes or for a tumour that does not respond to hormonal treatment.

Before treatment

Mention urinary obstruction, severe back pain, weakness in the legs, diabetes, high blood pressure, depression, heart rhythm problems and osteoporosis. Nasal disease or regular decongestant use also matters if spray treatment is planned. Ask the team to show you how to use it and help you plan the timing.

Bring an up-to-date list of prescription medicines, pharmacy medicines, supplements and traditional or herbal remedies. Include medicines used only occasionally, creams containing hormones, and anything recently stopped. Mention previous allergies and describe what happened, rather than only naming the drug. Your pharmacist can check the whole list together.

Tell the team about any planned operation, dental procedure, travel or difficulty attending appointments. Discuss costs and supply before the first dose if obtaining regular refills may be difficult. Agree who will arrange repeat prescriptions and tests. Keep your own hospital's daytime and out-of-hours contact details where you and a caregiver can find them quickly.

How to take or receive treatment

A labelled Suprefact starting schedule uses 0.5 mg under the skin every eight hours for seven days, followed by the nasal formulation from day eight. Nasal treatment is usually divided into six administrations through the day. The precise number of sprays, nostril instructions and timing must come from your own prescription and device leaflet; do not convert an injection dose into sprays yourself.

If self-injection is prescribed, training and sharps disposal are required. For nasal treatment, use the demonstrated priming and cleaning method. Store the nasal bottle within the temperature limits on its label, out of children's reach, and record its opening date because the in-use expiry can differ from the printed expiry. If a nasal decongestant is needed, wait at least 30 minutes after buserelin before using it; ask the pharmacist to confirm the schedule for your products.

If a spray dose is forgotten, use it when remembered unless the next dose is nearly due; then omit it. Do not double. Call the team if several doses are missed, the device fails, or nasal symptoms interfere with use. Vomiting does not usually remove a nasal or injected dose, so do not repeat it on that basis.

Check the date of the next appointment before leaving the clinic. An injection described as monthly may have a specific number of weeks or calendar-month interval; use the date your team gives you. Contact the clinic promptly if an appointment is missed or needs changing. Do not arrange an extra dose, substitute another depot strength or change the interval yourself.

Tell the nurse about blood thinners, unusual bruising, an infection near the planned injection site or a previous injection reaction. The preparation and route are specific to the product. Unless your team has explicitly supplied a suitable home-use product and trained you, the injection is given by a healthcare professional.

Usually the clinic stores and prepares the medicine. If you must collect or transport it, ask the dispensing pharmacy how to store and transport it, and keep their instructions handy. Do not assume all injections need the same refrigeration. If home injections are prescribed, use the provided sharps container and disposal service; never put loose needles into household waste.

Use a calendar or a phone reminder that records what was actually taken or given. A tick made after a dose is more useful than one made in advance. If someone helps with medicines, agree who records each dose so it is not accidentally repeated. Keep the drug name, strength and current instructions together; an old prescription may no longer describe your current dose.

Contact the treating team if a supply problem or illness is likely to interrupt treatment. Do not stretch the supply by taking smaller doses or lengthening intervals yourself. If you receive too much medicine, seek urgent advice and have the packaging and dose times available. Do not induce vomiting.

Monitoring your treatment

PSA and testosterone may be followed to confirm response and suppression. Blood pressure, diabetes control, bone health and mood are reviewed as appropriate. Persistent nasal problems deserve review because they can make consistent treatment difficult.

Monitoring has two purposes: checking whether treatment is helping and detecting problems that may be silent at first. Your schedule depends on the medicine, any partner treatment and your general health. Ask which results need to be reviewed before the next prescription or injection, and who will contact you if a result is abnormal.

Record symptoms that affect eating, walking, sleep or daily activities, along with when they began. Bring this record to appointments. A single symptom or blood result rarely explains the whole picture; the team may compare trends, examination findings and scans. Feeling well is welcome, but it does not remove the need for planned monitoring.

Suprefact instructions recommend checking testosterone every three months after the initial assessment. The team should also assess anaemia risk and review bone density during ongoing treatment. Diabetes medicines may need adjustment because their effect can be reduced.

Common side effects

Effects to discuss with your team

Hot flushes, sweating, reduced sexual interest, erection difficulties and fatigue are expected hormone-related effects. Nasal irritation or nosebleeds can occur with the spray; injections may cause local discomfort. Tell the team if either route is becoming difficult to use.

These medicines change the signals that control hormone production. After an initial stimulation, continuous treatment suppresses the signal, lowering testosterone. Early symptoms can therefore differ from those experienced after suppression is established. A temporary rise in hormones can cause a flare, but new severe pain or neurological symptoms must never simply be labelled a harmless flare.

Lower sex-hormone levels can cause hot flushes, night sweats, reduced sexual interest, fatigue and mood changes. Erection difficulties may also occur. Cooling measures, a regular sleep routine and tailored activity can help some people. Persistent symptoms deserve treatment rather than silent endurance. Do not start hormone replacement or testosterone supplements without the cancer team's agreement.

Longer treatment can reduce bone density and alter body composition. Your team may assess fracture risk and discuss a bone-density scan, vitamin D, calcium intake and medicines to protect bone where appropriate. Blood pressure, weight and blood sugar may need review, particularly when testosterone is suppressed. Report severe depression, new visual symptoms or a sudden unusual headache promptly.

Making symptoms easier to manage

Tell the team which symptom is causing the most difficulty. Describe its effect on ordinary tasks: for example, whether pain prevents dressing or tiredness stops you preparing food. This helps the team choose practical support and judge whether treatment needs adjustment. Avoid waiting until the next routine visit if symptoms are worsening.

For mild nausea, try smaller meals and regular sips of fluid, following any food rule for the medicine. Ask about an anti-sickness medicine if needed. Repeated vomiting, inability to keep fluids down or very little urine needs prompt advice. If you have been told to restrict fluids for another illness, use that plan rather than forcing extra drinks.

Energy and emotional wellbeing

Pace demanding activities and allow rest, but keep some gentle movement in your day if you can. Persistent exhaustion deserves assessment; poor sleep, anaemia, low mood and other illnesses may contribute. Tell the team about persistent anxiety, sadness or loss of interest. If you feel at risk of harming yourself, seek emergency help and ask someone to stay with you.

Important side effects

The effects below are important because they may require tests or a change in treatment. They are not a prediction that you will develop them. New symptoms can also come from the cancer or an unrelated illness. Reporting them promptly allows the team to work out the cause; do not assume that everything is a routine treatment effect.

Early tumour flare can worsen pain or obstruction. Longer-term concerns include bone thinning, metabolic changes and depression. Heart rhythm risk should be assessed with other medicines and electrolyte problems. Severe allergy is uncommon but urgent.

Other medicines and vaccinations

The pharmacist should review heart-rhythm medicines and drugs that alter blood sugar. Keep nasal decongestants at the required interval from the spray. Hormone measurements during treatment can be affected by suppression, so tell anyone ordering endocrine tests that you receive buserelin.

Ask the oncology pharmacist to check new medicines before you start them, including antibiotics prescribed elsewhere. Do not stop essential treatment for another illness on your own. If an interaction is possible, the prescribers can choose an alternative, adjust a dose or arrange monitoring. Herbal products labelled natural can still alter drug levels or have hormone-like effects.

Vaccination advice depends on your complete treatment plan. Hormone treatment alone does not automatically mean that every vaccine is unsuitable. Ask about influenza, COVID-19 and other recommended vaccines; live vaccines need a specific check if you also receive chemotherapy, an immune-suppressing medicine or certain doses of steroid. Tell the vaccination service all the treatments you receive.

Everyday life

Food and movement

Aim for regular meals with enough protein and a varied range of foods that you can tolerate. Tell the team about unplanned weight loss, rapid weight gain or difficulty eating. A dietitian can adapt advice to diabetes, kidney problems, bowel symptoms or a restricted appetite. Do not start a restrictive diet or high-dose supplement as a substitute for treatment.

Choose activity that suits your strength and balance. Short walks or gentle exercises may be easier to sustain than occasional strenuous sessions. If cancer affects your bones, or you have osteoporosis, ask which movements and resistance exercises are safe before starting a new programme. New focal bone pain should be assessed rather than exercised through.

Work and travel

Many people continue some usual activities, but flexibility helps while you learn how treatment affects you. Discuss rest breaks, shorter hours or help with physically demanding work if needed. Avoid driving or operating machinery when dizzy, sleepy, confused or affected by visual symptoms. Follow any additional driving advice after a seizure or loss of consciousness.

Plan travel around prescriptions, injections and tests. Carry an up-to-date medicine list and enough supply for the agreed trip, with advice about storage and time-zone changes. For long journeys, discuss mobility and your individual clot risk. Do not start aspirin or a blood thinner simply because you are travelling.

Relationships and support

Changes in energy, body image or sexual function can affect relationships. You can ask for help privately, with or without a partner present. There may be practical measures or specialist support for discomfort and intimacy. A caregiver can help record symptoms and organise appointments while leaving treatment decisions and personal information under your control.

Fertility, pregnancy and breastfeeding

Reduced testosterone and sexual function do not guarantee infertility. Discuss contraception with a partner who could become pregnant and ask the team to specify how long precautions apply after the final treatment. Oncology buserelin must not be assumed interchangeable with protocols used in fertility treatment.

Tell the team before treatment if having children in the future matters to you. Fertility preservation needs discussion before exposure where possible. Reduced fertility is not the same as reliable contraception, and an absence of periods or reduced sexual function does not prove that pregnancy is impossible.

Ask your team which contraception to use and how long to continue it, taking account of every medicine in your regimen. A partner drug may require a longer precaution period than this medicine alone. If pregnancy is suspected in you or a partner during a risk period, contact the treating team promptly for individual advice. Do not make pregnancy or breastfeeding decisions from a generic time interval without checking your own treatment plan.

After treatment

Do not stop the nasal spray simply because symptoms or PSA improve. When treatment is deliberately stopped or changed, testosterone recovery and symptom improvement can take time. Continued monitoring is needed according to the cancer plan.

Before a planned stop, confirm which medicines end, which continue, and when the next review is due. Return unused medicine through the pharmacy's recommended route; do not give it to another person. Keep a record of the last dose and any side effects that still need follow-up.

Changes caused by treatment may settle gradually, and some need ongoing support. Report persistent symptoms or new problems after treatment rather than assuming they will disappear on their own. Continue the agreed follow-up and screening plan. If treatment is being changed, ask your team to help you update your treatment schedule so that old and new instructions are not accidentally combined.

Common questions