How Hormone Therapy for Prostate Cancer Is Given and What the First Months Feel Like

The appointment he had dreaded for a week was over in less time than it took to find parking. A nurse checked his name, asked about allergies, gave one injection just under the skin of his belly, pressed a small dressing over it and said she would see him in a few months. He sat in the car afterwards, oddly deflated. That was it?

Many men describe the same anticlimax. The night before, he had typed a search that thousands of others type: prostate cancer hormone therapy how it works. The answers he found were either a paragraph of jargon or a forum thread of frightening anecdotes. Neither told him what the coming weeks would actually feel like, or why nothing seemed to change on day one.

This explainer fills that gap. It walks through the biology in plain language, the practical ways the treatment is given, the typical timeline of effects, and the honest state of the evidence on what it can and cannot do. Every decision, as you will read more than once, sits with your treating team.

What is prostate cancer hormone therapy actually trying to do?

Think of a prostate cancer cell as a small engine. For most of these cells, the fuel is testosterone, the main male sex hormone, and its close relatives, together called androgens. Testosterone binds to a receptor inside the cell, switches on genes that drive growth, and the cell divides. Take the fuel away and many of those engines slow, stall or shut down.

That is the whole idea behind hormone therapy, which clinicians also call androgen deprivation therapy or ADT. According to the National Cancer Institute, the testicles make the large majority of a man’s testosterone, with a smaller amount coming from the adrenal glands and, in advanced disease, from the tumor itself. Hormone therapy either stops the testicles making testosterone, blocks the receptor the hormone lands on, or interferes with the enzymes that build androgens elsewhere in the body.

Two consequences follow, and both matter for how the first months feel. First, this is not chemotherapy. Chemotherapy poisons rapidly dividing cells; hormone therapy starves them. There is no hair loss and no dramatic nausea, which is why so many men feel strangely normal in week one. Second, because the treatment lowers a hormone that also runs a good deal of ordinary male physiology, the side effects are the predictable results of low testosterone: hot flashes, changes in muscle and fat, reduced sexual desire, and shifts in bone and metabolic health.

Hormone therapy does not remove a tumor. It shrinks and controls one, sometimes for many years, and it makes radiotherapy work better. Understanding that distinction early spares a lot of confusion when the PSA falls but the scans still show a prostate.

Androgen deprivation therapy explained: the main ways testosterone is lowered

The body controls testosterone through a chain of command. The hypothalamus in the brain releases a signal called LHRH (luteinizing hormone-releasing hormone, sometimes written GnRH). The pituitary gland responds by releasing luteinizing hormone, and that hormone tells the testicles to make testosterone. Most hormone treatments interrupt one link in that chain.

LHRH agonists are synthetic copies of the brain’s signal. Given continuously, they overstimulate the pituitary until it stops responding, and testosterone falls to a very low level, often called the castrate level. The National Cancer Institute notes that testosterone first rises briefly, a phenomenon called flare, before dropping over the following weeks.

LHRH antagonists block the pituitary directly, so testosterone falls within days and there is no flare, again per the NCI fact sheet.

Anti-androgens are tablets that sit in the androgen receptor on the cancer cell and stop testosterone from docking. They may be used for a short period around the start of an agonist to blunt the flare, or alongside other treatments. Newer androgen receptor pathway inhibitors work on the same principle with stronger blockade, and other tablets stop the enzyme that builds androgens in the adrenal glands and tumor.

Orchiectomy, surgical removal of the testicles, achieves the same hormonal result immediately and permanently. It is used less often but remains a valid option that some men prefer because it avoids repeated appointments.

Which route is chosen depends on cancer stage, other health conditions, how quickly testosterone needs to fall, and personal preference. That is a conversation for the prescribing clinician, not a decision this article can make.

How are hormone injections for prostate cancer given, and what about tablets or surgery?

For most men, the practical reality of treatment is a short appointment every few months. The NHS explains that hormone therapy is most often given as injections, or as a small implant placed under the skin, with the interval between doses ranging from monthly to several months apart depending on the preparation the team chooses. The injection is usually into the fat of the abdomen, the buttock or the upper arm, and takes a minute or two.

Some formulations are slow-release depots: a small volume of medicine forms a reservoir under the skin and trickles out steadily until the next visit. A firm lump at the site for a few weeks is normal with these. Others are placed with a slightly wider needle as a solid implant, which can be felt beneath the skin and dissolves over time.

Tablets are taken at home, usually daily, and are commonly combined with an injection rather than used alone. Your pharmacist and clinic will explain what to do about missed doses and any interactions with other medicines; this article deliberately does not.

Orchiectomy is a short operation, usually done as day surgery under local or general anesthesia. The Mayo Clinic describes it as a one-time procedure that lowers testosterone permanently, which removes the need for ongoing injections but cannot be reversed.

Whatever the route, expect blood tests before and during treatment, a PSA check at intervals, and a review of blood pressure, weight and sometimes blood sugar and cholesterol. These visits are where the timeline described in the coming sections is tracked and, if necessary, adjusted by the treating team.

Who is hormone therapy usually for, and who is usually asked to wait?

Hormone therapy is not the default treatment for every prostate cancer. It earns its place in specific situations, and it is often deliberately withheld in others.

It is usually offered in three broad settings, according to the NHS and the National Cancer Institute. The first is alongside radiotherapy for cancer that is still within or just beyond the prostate but judged intermediate or high risk; here it makes the radiation more effective and is given for a defined period, from months to years, set by the team. The second is cancer that has spread to lymph nodes, bones or other organs, called metastatic disease, where it is the backbone of treatment. The third is a rising PSA after surgery or radiotherapy, when scans may or may not show where the cancer has returned.

It is usually not started for low-risk, slow-growing cancer confined to the prostate. For those men, guidelines favor active surveillance, which means regular PSA tests, examinations and sometimes repeat biopsies or MRI, with treatment held in reserve. The NHS notes that many such cancers never need treatment at all, and the side effects of hormone therapy would outweigh any benefit.

Men whose PSA is rising very slowly after earlier treatment may also be asked to wait and watch, because starting hormone therapy earlier has not been shown to help in every case and does bring years of side effects forward. A history of heart disease, diabetes, fragile bones or depression does not rule the treatment out, but it does shape how closely a man is monitored and which class of drug is chosen. All of these are judgments the prescribing clinician makes with the full picture in hand.

Comparing the approaches side by side

Because several routes reach the same destination, a low testosterone level, it helps to see them laid out together. The table below summarizes what each involves and the features that most often influence the choice. It is a map, not a menu; the treating team selects the route.

Approach	What it does	How it is usually given	Points patients often ask about
LHRH agonist	Overstimulates then shuts down the pituitary signal to the testicles	Injection or implant under the skin at intervals of one to several months	Brief testosterone flare in the first weeks; testosterone falls over the following weeks (NCI)
LHRH antagonist	Blocks the pituitary signal directly	Injection under the skin, or in some cases tablets	Testosterone falls within days; no flare (NCI)
Anti-androgen tablets	Block the androgen receptor on cancer cells	Daily tablets, often combined with an injectable	May be used briefly to cover flare; breast tenderness is more common with some agents
Androgen synthesis inhibitor	Blocks the enzyme that builds androgens in adrenal glands and tumor	Daily tablets, usually with a steroid tablet	Requires blood pressure, potassium and liver monitoring
Orchiectomy	Surgically removes the source of most testosterone	One-time day-case operation	Immediate and permanent; no repeat visits; not reversible (Mayo Clinic)

Notice what the table does not contain: any statement that one approach controls cancer better than another in general. For most men the different methods of lowering testosterone produce similar cancer control, and the choice turns on speed, reversibility, convenience, heart health and preference. Newer receptor and synthesis blockers are typically added to, rather than substituted for, the basic testosterone-lowering step in more advanced disease, a decision that rests on stage and guideline criteria.

What the first two weeks of hormone treatment usually feel like

The most common report from week one is: nothing much. That is not a failure. With an LHRH agonist, testosterone actually rises for a short spell before it falls, so the body has not yet registered the change. With an antagonist, levels drop within days, but the symptoms of low testosterone still take time to appear.

What men do notice early tends to be local. The injection site may be sore, slightly red or firm for several days; a depot formulation can leave a small lump you can feel for weeks. Mild bruising is common with any injection. Anything spreading, hot or increasingly painful is a reason to call, as covered later.

The flare deserves a specific word. During the brief testosterone rise with an agonist, a small number of men with cancer already pressing on bone or the urinary tract can notice a temporary worsening of pain or difficulty passing urine. The National Cancer Institute explains this is why an anti-androgen tablet is sometimes prescribed for a few weeks at the start. If you have bone pain or urinary symptoms already, your team will have planned for this; if new symptoms appear, tell them.

The other early experience is psychological. Starting a treatment that will reshape your hormones, with no visible result for weeks, can feel like waiting for a storm. Some men find the anticipation harder than the side effects that eventually arrive. Knowing the sequence, which is what the next sections describe, takes some of the dread out of it.

Practical tip from the evidence: use these quiet weeks to book a baseline. Weight, waist measurement, a note of your usual energy and sleep, and, if not already arranged, the bone density scan many guidelines recommend before or soon after starting.

Hormone therapy prostate cancer side effects in weeks two to eight: hot flashes, tiredness and mood

Somewhere between the second and the eighth week, most men start to feel the treatment working, and the first sign is usually heat. Hot flashes are the single most commonly reported side effect of androgen deprivation, listed as such by the NHS, the Mayo Clinic and the National Cancer Institute. A wave of warmth rises through the chest, neck and face, often with sweating, lasting a few minutes. They may come a handful of times a day or wake you at night.

The mechanism is the same as in menopause: the brain’s thermostat, which is influenced by sex hormones, becomes twitchy when those hormones fall. Triggers men commonly identify include hot drinks, alcohol, spicy food, warm rooms and stress. Layered clothing, a fan by the bed and a cool drink to hand are the low-tech first steps. For men whose flashes are disruptive, there are prescription options that a doctor can discuss; the evidence for herbal remedies is weak and some interact with other medicines, so mention anything you are considering.

Fatigue arrives in the same window. It is less the heavy-limbed exhaustion of chemotherapy and more a flatness: motivation dips, the afternoon stretches, exercise feels harder. Regular physical activity, counterintuitively, is the intervention with the best evidence for easing it.

Mood shifts are real and under-discussed. Testosterone influences the brain, and some men describe tearfulness, irritability or a low, foggy feeling within the first two months. The Mayo Clinic lists depression among recognized effects. This is a hormonal effect, not a character flaw, and it responds to the same things depression usually responds to: talking about it, exercise, sleep, and, if persistent, professional support arranged through your team.

Months two to six: strength, weight, sex and intimacy

By the third month, changes shift from how you feel to how your body is built. Testosterone maintains muscle and limits fat. Without it, muscle mass gradually falls and fat, particularly around the abdomen, tends to rise, even if eating habits have not changed. The National Cancer Institute lists loss of muscle mass and weight gain among expected effects. Men often notice trousers tightening at the waist while their arms look thinner.

Resistance exercise, meaning anything that makes muscles work against a load, is the counter-move with the strongest evidence, and it is discussed further in the section on living well. It will not fully reverse the hormonal effect, but studies consistently show it preserves strength and function better than doing nothing.

Sexual changes are almost universal and are the topic men most often say nobody prepared them for. Libido, the desire for sex, falls because desire itself is driven by testosterone. Erections become harder to achieve and maintain, and the penis and testicles may shrink somewhat over months. The NHS and Mayo Clinic both list these as common. Some men find that intimacy without the pressure of intercourse becomes more important; partners frequently say what they missed most was closeness, not sex. Erectile aids and medicines exist, and a clinician or specialist nurse can talk them through if that matters to you.

Breast tenderness or slight enlargement, called gynecomastia, can develop, more so with certain anti-androgen tablets than with injections alone. Body hair may thin. Some men also notice a mild anemia, a lower red blood cell count, which contributes to fatigue and is picked up on routine bloods.

None of these changes mean the treatment is harming you in a way that requires stopping. They mean it is doing exactly what it is designed to do. Whether the balance remains right for you is a conversation to have, openly, with the prescribing team.

Bones, heart and blood sugar: the quieter effects your team watches

Some effects of low testosterone produce no symptoms at all until something goes wrong, which is why hormone therapy comes with a monitoring schedule rather than just a repeat prescription.

Bone density. Testosterone helps maintain bone. Deprive the skeleton of it for months and years and bone thins, a process that can progress to osteoporosis, where bones become porous and fracture more easily. The National Cancer Institute lists bone loss and increased fracture risk among established effects of long-term ADT. For this reason many guidelines advise a bone density scan (a DEXA scan, a quick low-dose X-ray of the hip and spine) near the start and periodically thereafter. Adequate calcium and vitamin D, weight-bearing exercise and not smoking are the everyday protections; where bone loss is significant, bone-strengthening medicines are available and are decided on by the team.

Heart and metabolism. Low testosterone changes how the body handles sugar and fat. Insulin resistance can rise, cholesterol patterns can shift, and body fat increases. The NCI notes an association between hormone therapy and an increased risk of diabetes, and possible increased cardiovascular risk, although the evidence on heart events is mixed and depends on a man’s baseline health and the type of drug. The practical consequence: expect your blood pressure, weight, blood glucose and lipids to be checked, and expect a conversation about any existing heart condition when the treatment is chosen.

Thinking and memory. Some men describe a mental fog. Research on whether ADT measurably affects cognition is inconsistent, and the honest summary is that any effect appears modest for most men, but if you notice a change, mention it.

These are reasons for vigilance, not for alarm. The point of the monitoring is to find and address problems while they are small.

How do doctors know whether the hormone therapy is working?

Men often ask how successful hormone therapy is, and the fairest answer starts with how success is measured. The main marker is PSA, prostate-specific antigen, a protein made by prostate cells, both normal and cancerous, that can be measured in the blood. When testosterone falls, prostate cancer cells make far less PSA, so the number typically drops within the first weeks to months. A falling PSA is the earliest signal that the cancer is responding; the depth and speed of the fall carry prognostic information that your oncologist will interpret in context.

Testosterone itself is sometimes checked to confirm it has reached the intended low level. If it has not, the team may change the interval or the preparation.

Scans are repeated when there is a reason: a PSA that is climbing again, new symptoms, or a planned reassessment point. Symptoms matter too. Bone pain easing and urinary flow improving are real evidence of benefit.

What the evidence actually shows is that the large majority of prostate cancers respond to androgen deprivation initially, often with a marked fall in PSA and shrinkage on imaging. Over time, however, some cancer cells adapt: they amplify their receptors, make their own androgens, or find growth signals that bypass hormones altogether. When PSA rises despite castrate testosterone, the cancer is described as castration-resistant. The National Cancer Institute explains that this eventually happens in most men treated for metastatic disease, on a timescale that varies enormously, from months to many years. It is not the end of treatment; it is the point at which other classes of drug, and sometimes chemotherapy or radiotherapy, are considered.

Percentages for response or survival depend heavily on stage and are best quoted from a named guideline or trial by the treating team, who know which figures apply to you.

How long does hormone therapy last for prostate cancer?

There is no single answer, because the same treatment is used for very different jobs.

When hormone therapy is paired with radiotherapy for cancer confined to the prostate area, it is given for a defined period. The NHS describes courses that may start some months before radiotherapy and continue for up to about three years afterwards, with shorter courses for intermediate-risk disease and longer for high-risk. These durations come from trials that tested specific lengths, and the team selects one based on your risk group. When the course ends, testosterone usually recovers over months, though the National Cancer Institute notes recovery is slower and sometimes incomplete in older men and after longer courses.

When the cancer has spread, hormone therapy is generally long-term, continuing as long as it is controlling the disease and tolerable. For many men this means years.

A middle path is intermittent therapy: treatment until PSA falls to a low level, then a planned break with close monitoring, restarting when PSA rises to an agreed threshold. The NCI reports that in selected men with a rising PSA after earlier treatment, intermittent therapy has produced comparable cancer control to continuous therapy with fewer side effects during breaks, whereas for men with visible spread the evidence is less reassuring and continuous therapy is more often advised. Whether you are a candidate is a decision for your oncologist.

Two practical points follow. First, never lengthen an interval or skip an injection on your own initiative; timing is part of the design. Second, ask at the outset what the planned duration is and what would trigger a change. Knowing whether you are on a three-year course or an indefinite one changes how you plan your life around it.

How quickly does prostate cancer grow, and why does that change the plan?

It is one of the most searched questions after diagnosis, and it shapes everything about whether and when hormone therapy is used.

Most prostate cancers grow slowly. The NHS states that the disease usually develops slowly, so there may be no signs for many years, and that some cancers grow too slowly ever to cause harm within a man’s lifetime. MedlinePlus makes the same point: many prostate cancers are slow-growing and may not need immediate treatment. That is the basis for active surveillance in low-risk disease and for the decision to hold hormone therapy in reserve.

A minority behave differently. Pathologists grade cancer cells under the microscope using the Gleason score, or the newer grade group, which reflects how abnormal the cells look and therefore how aggressively they are likely to behave. Higher grades, a high or fast-rising PSA, and cancer already outside the prostate all point to faster growth. These are the cancers for which hormone therapy is started promptly, either with radiotherapy or as the main treatment.

Doctors also watch PSA doubling time, the number of months it takes for PSA to double. A doubling time measured in years suggests a cancer that can be watched; one measured in a few months suggests one that needs action. This is why a man with a slowly creeping PSA after surgery may be asked to wait, while another with the same PSA value but a steep curve is offered treatment.

Speed of growth does not predict how a man will feel on treatment. It does predict how urgent the treatment is and how long it is likely to be needed, and it is the single most useful thing to understand about your own diagnosis when you sit down to discuss options.

Living well alongside treatment: what the evidence supports

Ask what life is like after a prostate cancer diagnosis on hormone therapy and you will hear two stories. One is of men who feel diminished, tired and withdrawn. The other is of men who, after an adjustment period, run, work, travel and coach grandchildren. The difference is rarely the cancer. It is usually what happens in the hours between appointments.

Exercise has the best evidence of anything a man can do for himself on ADT. Structured programs combining aerobic activity with resistance training have been shown in randomized trials to preserve muscle, reduce fatigue, improve mood and blunt gains in body fat, and major cancer organizations now recommend them for men on hormone therapy. Two or three sessions a week of something that makes muscles work, plus regular brisk walking or cycling, is the pattern most programs use. Start below what you think you can manage and build; a physiotherapist or exercise professional experienced in cancer care is worth asking about.

Eating well matters for the same reasons. The aim is not a special cancer diet; there is no good evidence for one. It is protein at each meal to support muscle, plenty of vegetables, fruit and whole grains, calcium-rich foods for bone, and limiting alcohol, which worsens hot flashes and adds calories. The NIH Office of Dietary Supplements is a reliable source on vitamin D and calcium if you want to read further; discuss any supplement with your team first.

Sleep is often broken by night sweats. A cool room, moisture-wicking bedding and avoiding alcohol in the evening help more than people expect.

Finally, bring your partner into the conversation early. Changes in desire and mood land on two people, and couples who name them tend to manage better than those who wait for the other to raise it.

What people often get wrong about prostate cancer hormone therapy

It is chemotherapy. It is not. Chemotherapy kills dividing cells directly and is a different class of treatment with different side effects. Hormone therapy removes the hormonal fuel; hair loss and severe nausea are not features of it.

It is the same as taking hormones. Men sometimes assume they are being given testosterone, or fear they are being given female hormones. Standard ADT lowers a man’s own testosterone or blocks it. Estrogen-based approaches exist but are uncommon.

If it works, the cancer is gone. A PSA that falls to near zero means the cancer is controlled, not eliminated. Cells that survive in a dormant state can adapt over time. This is why monitoring continues even when the numbers look excellent.

If it stops working, there is nothing left. Castration-resistant disease has several further treatment options, including additional hormonal agents, chemotherapy, radiotherapy and, in selected cases, targeted or radioactive therapies. Progression on ADT is a transition, not a dead end.

Side effects mean the dose is wrong. Hot flashes, fatigue and low libido are signs of low testosterone, which is the goal. They do not indicate an error. They are, however, always worth reporting, because how they are managed can change.

Once started, it can never stop. Many courses are time-limited by design, and intermittent schedules exist for some men. Duration is a clinical decision, and it is legitimate to ask about it.

Supplements or diets can replace it. No food, herb or supplement lowers testosterone enough to treat cancer, and some interfere with treatment or laboratory tests. Anything you take should be on your medication list.

Feeling low is weakness. Mood change is a documented pharmacological effect of removing testosterone. Treating it as a medical issue rather than a personal failing is both accurate and more useful.

Questions to ask your care team

The most useful appointments are the ones where the patient arrives with questions written down. The following are the ones experienced oncology nurses say men most often wish they had asked at the start. They are prompts for discussion, not a checklist that any article can answer for you.

• What is the goal of hormone therapy in my case: to make radiotherapy more effective, to control cancer that has spread, or to respond to a rising PSA?
• Which approach are you recommending, and why that one for me rather than the alternatives?
• How long do you expect me to be on treatment, and what would prompt you to change or stop it?
• Will I have a bone density scan, and how will my heart health, blood sugar and cholesterol be monitored?
• Which side effects should I expect in the first two months, and which ones would you want to hear about straight away?
• Is intermittent therapy something that could apply to me now or later?
• What options exist for hot flashes, sexual function and mood if they become difficult?
• Is there an exercise program or a physiotherapist you would refer me to?
• Who do I contact between appointments, and how quickly can I expect a reply?
• If my PSA starts to rise on treatment, what would the next steps look like?
• How will this treatment interact with my other conditions and medicines?
• Is there a clinical trial that might be appropriate for me?

Consider taking someone with you and asking whether you can record the conversation or receive a written summary. Men consistently report remembering less than half of what was said in a first oncology appointment, which is entirely normal under stress. Your team will expect follow-up questions, and asking them is part of being treated well, not a nuisance.

When to call your doctor

Most of what hormone therapy does in the first months is uncomfortable rather than dangerous, and most of it can wait for a scheduled review. A small number of situations should not wait. The list below reflects the warning signs highlighted by the NHS, the Mayo Clinic and the National Cancer Institute for men on androgen deprivation therapy; use the urgent contact number your team gave you, or emergency services where indicated.

Seek emergency care immediately for chest pain or pressure, sudden shortness of breath, sudden weakness or numbness on one side of the body, facial drooping or trouble speaking. These can signal a heart attack or stroke, and men on hormone therapy who also have cardiovascular risk factors should treat them as such. Also seek emergency care for a swollen, painful calf together with breathlessness, which can indicate a blood clot that has travelled to the lungs.

Call your team the same day for: new or rapidly worsening back pain, especially with leg weakness, numbness, or loss of bladder or bowel control, because cancer in the spine can press on the spinal cord and needs urgent assessment; inability to pass urine or a sudden marked worsening of urinary difficulty; a fever, or an injection site that is spreading, hot, increasingly painful or leaking; blood in the urine that is more than a trace; a fall or injury with severe pain, since bones may be more fragile than before.

Call within a day or two for persistent low mood, thoughts of self-harm, hot flashes or night sweats severe enough to stop you functioning, dizziness or fainting, new swelling of the breasts that is painful, or any new symptom you cannot explain.

Nothing in this section is meant to frighten. Men who know which signs matter tend to seek help at the right time and avoid unnecessary worry about the rest. Your treating team remains the final authority on every one of these decisions.

Frequently asked questions

How quickly does prostate cancer typically grow?

Most prostate cancers grow slowly, often over many years without causing symptoms, which is why low-risk disease is frequently monitored rather than treated straight away. A minority grow faster, and doctors judge this from the Gleason grade of the cells, the PSA level and how quickly PSA is rising. Faster-growing or already-spread cancers are the ones for which hormone therapy is started promptly, sometimes together with radiotherapy.

How long do men live with hormone therapy for prostate cancer?

There is no single figure, because hormone therapy is used for very different stages of disease. For cancer confined to the prostate area, it is a time-limited addition to radiotherapy in men who are expected to live many years. For cancer that has spread, it commonly controls the disease for years, though eventually most cancers adapt and other treatments follow. Your oncologist can quote figures that apply to your specific stage and health.

How successful is hormone therapy in treating prostate cancer?

The large majority of prostate cancers respond initially, with PSA falling and tumors shrinking, because most depend on testosterone to grow. Success is measured by PSA, symptoms and scans rather than by removal of the cancer, which hormone therapy does not achieve on its own. Over time some cancers become castration-resistant, meaning they grow despite low testosterone, at which point further hormonal agents, chemotherapy or radiotherapy are considered.

What is life like after prostate cancer treatment with hormone therapy?

Life on and after hormone therapy varies widely, but most men continue working, exercising and travelling with adjustments. The common challenges are fatigue, hot flashes, weight change, reduced sexual desire and mood shifts. Men who exercise regularly, keep appointments, involve their partners and report side effects early tend to describe a better quality of life. When a time-limited course ends, testosterone usually recovers over months, and many effects ease.

Do hormone injections for prostate cancer hurt?

The injection itself is brief and most men describe a sharp scratch or mild sting rather than significant pain. Slow-release preparations can leave a firm, tender lump under the skin for days to weeks, which is expected. Implants use a slightly wider needle and a local anesthetic is sometimes used. Spreading redness, heat, increasing pain or leakage at the site is not normal and should be reported to your team.

How long do hot flashes last on hormone therapy prostate cancer side effects?

Individual hot flashes typically last a few minutes, and they tend to begin within the first two months of treatment. For many men they continue for as long as testosterone stays low, though some find they become less frequent with time. They usually fade after a time-limited course ends and testosterone recovers. If they disrupt sleep or daily life, tell your team, as prescription options exist that a clinician can discuss.

Is androgen deprivation therapy the same as chemotherapy?

No. Androgen deprivation therapy lowers or blocks testosterone so cancer cells lose the hormone they need to grow, whereas chemotherapy uses drugs that directly kill rapidly dividing cells. The side effects differ: hormone therapy causes hot flashes, fatigue, sexual changes and shifts in body composition, while hair loss and severe nausea are not typical. In advanced disease the two may be used together, a decision made by the oncology team.

Why does my doctor say the injection first raises testosterone before lowering it?

LHRH agonists work by mimicking the brain hormone that tells the pituitary to stimulate the testicles. At first this overstimulation causes a brief rise in testosterone, called a flare, before the pituitary stops responding and testosterone falls over the following weeks. In men with cancer near bone or the urinary tract, the flare can temporarily worsen symptoms, so an anti-androgen tablet is sometimes prescribed for a short period at the start.

Can I stop hormone therapy once my PSA is very low?

Never stop or delay treatment on your own; a low PSA means the cancer is being controlled, not that it has gone. Some men are candidates for planned intermittent therapy, in which treatment pauses when PSA is low and restarts when it rises, and time-limited courses alongside radiotherapy end on a schedule set by the team. Whether either applies to you is a decision for your oncologist based on stage and risk.

What can I do myself to feel better during hormone therapy?

Regular exercise combining brisk aerobic activity with resistance training has the strongest evidence for reducing fatigue, preserving muscle and improving mood. Eating protein at each meal, choosing calcium-rich foods, limiting alcohol and keeping the bedroom cool help with body composition, bone health and night sweats. Report mood changes early, involve your partner in conversations about intimacy, and discuss any supplement with your team before taking it.

References

• Prostate cancer: Treatment (NHS)
• Prostate Cancer (MedlinePlus)
• Prostate cancer overview (NHS)

This article is for general information only and is not a substitute for professional medical advice. Please consult a qualified doctor about your individual situation.