Hormones are tiny chemical messengers that travel through your blood to control different jobs in your body. Think of them as letters sent from glands to your organs with specific instructions on what to do.
Without hormones, your body cannot run the right way. But sometimes, these helpful messengers send the wrong signals to cancer cells and tell them to grow and multiply fast.
That is when doctors use a treatment called hormone therapy. This medical guide explains how hormone therapy works, which cancer types it treats, and what you can expect along the way.
Key Takeaways
- Hormone therapy slows down or stops cancer growth by cutting off the body hormones that fuel it.
- It is most often used for cancers that rely on hormones to grow, such as breast and prostate cancers.
- Treatments can be given as pills you swallow or as shots from your doctor.
- Side effects vary from person to person and depend on the exact type of medicine you receive.
- Talking openly with your doctor helps you manage side effects and feel more in control of your care.
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How Does Hormone Therapy Work?
In simple terms, hormone therapy blocks cancer cells from getting the hormones they need to grow and spread. This process can happen in a few different ways depending on your exact health needs.
Your doctor chooses the right method based on your test results, cancer type, and overall health. Here are the main ways hormone therapy stops cancer growth:
- Stopping hormone production: Some medicines stop your body from making the hormones that feed the cancer cells. In certain cases, doctors may even perform surgery to remove the glands that make those hormones.
- Blocking hormone action: Even if your body still makes hormones, this treatment blocks them from attaching to cancer cells. Imagine the cancer cell is a locked door and the hormone is the right key. This treatment blocks the keyhole so the key cannot open the door.
- Using fake hormones: Sometimes, doctors give you lab-made fake hormones. The cancer cells cannot use these fake hormones to grow. It is like giving the cell a fake key that looks real but does not work in the lock.
Hormone therapy cuts off the fuel supply that cancer cells need to survive. Doctors often use it by itself or alongside surgery, chemotherapy, or radiation therapy.
What Cancers Does This Treatment Help?
Hormone therapy does not work for every type of cancer. Doctors mainly use it for cancers that rely on hormones to grow and thrive.
The most common types of cancer treated with hormone therapy include:
- Prostate cancer in men.
- Breast cancer in women and men.
- Ovarian cancer in women.
- Uterine cancer in women.
Let us look closely at how hormone therapy helps treat each of these specific cancer types.
Prostate Cancer Hormone Therapy
Prostate cancer cells often need male hormones, especially testosterone, to grow and multiply. The main goal of this treatment is to lower testosterone levels or stop those hormones from working.
In some cases, surgery to remove one or both testicles, known as an orchiectomy, is part of this treatment plan. When doctors use medicines, they rely on several main drug types.
| Medicine Type | How It Works |
|---|---|
| Abiraterone acetate | Stops prostate cancer cells from making male hormones inside the cells. Doctors often prescribe this when other hormone treatments stop working. |
| LHRH agonists | Sends signals to the pituitary gland in your brain to stop telling the testicles to make testosterone. This cuts off the fuel supply for cancer cells. |
| Antiandrogens | Stops your body testosterone from attaching to cancer cells. Even if hormones are present, the cancer cells cannot use them. |
Possible Side Effects
Taking these medicines can cause side effects. However, these side effects do not happen to everyone, and some people feel very few or none at all.
- Gaining weight.
- Lower sex drive or interest in sex.
- Trouble getting or keeping an erection.
- Weaker bones that break more easily, known as osteoporosis.
Breast Cancer Hormone Therapy
About eight out of ten breast cancers rely on hormones to grow. Specifically, a female hormone called estrogen helps these cancer cells multiply.
Imagine cancer cells have tiny antennas on their surface called hormone receptors. When estrogen attaches to these antennas, the cancer cell gets a signal to grow. Doctors call these hormone receptor-positive cancers.
Hormone treatments lower your body estrogen level or stop estrogen from attaching to cancer cells. Doctors often prescribe this treatment after surgery to lower the chance that the cancer comes back.
| Medicine Type | How It Works |
|---|---|
| Aromatase inhibitors | Lowers estrogen levels by blocking an enzyme that turns other body hormones into estrogen. Doctors usually give this to women who have gone through menopause. |
| SERMs | Stops estrogen from attaching to breast cancer cell receptors so the cancer cells do not get growth signals. |
| ERDs | Blocks estrogen action and lowers the number of estrogen receptors on cancer cells so hormones have nothing to attach to. |
Possible Side Effects
- Joint pain and stiff joints.
- Feeling tired all the time.
- Nausea and upset stomach.
- Gaining extra weight.
- Lower interest in sex.
- Sudden feelings of intense body heat, known as hot flashes.
- Breast pain or swelling.
Ovarian and Uterine Cancer Hormone Therapy
Doctors also use hormone therapy for some rare types of ovarian cancer and certain uterine cancers. For uterine cancer, doctors often use a medicine called progestin, which acts like the hormone progesterone to slow down cancer cell growth.
Doctors may also use LHRH agonists, tamoxifen, and aromatase inhibitors to treat these two cancer types.
Possible Side Effects
- Sudden hot flashes.
- Dryness in the vaginal area.
- Weaker bones, known as osteoporosis.
- Pain in your joints and muscles.
- Weight gain.
- Sweating heavily at night.
How Doctors Give This Treatment and Risks
Doctors usually give hormone therapy in two main ways. One way is through oral pills or capsules that you swallow at home. The other way is through shots or injections given at a clinic.
Just like any cancer treatment, hormone therapy carries some risks and side effects. However, your experience depends greatly on your unique body, your health history, and the specific drug you take.
Before you start any treatment, talk openly with your doctor about potential side effects and how to manage them. Your care team is there to support you every step of the way.
Benefits and Success Rates of Hormone Therapy
The biggest benefit of hormone therapy is that it helps stop cancer from growing or slows down how fast it spreads. This treatment works especially well when doctors combine it with other therapies.
Sometimes, doctors use hormone therapy before surgery to shrink a tumor. Other times, they use it after surgery to keep the cancer from returning.
It is hard to give an exact number for how successful hormone therapy is. Success depends on your cancer type, how far it has spread, your age, and your overall health.
Your doctor is the best person to give you exact details about your personal health situation. Never feel afraid to ask questions about your treatment plan.
If you take hormone therapy, it is very important to keep all your clinic appointments and complete your lab tests on schedule.
💡 Take-Home Message
- Hormones are chemical messengers that control many jobs inside your body.
- Some cancers, like breast and prostate cancer, rely on hormones to grow and spread.
- Hormone therapy works by cutting off the hormone supply or blocking hormone action.
- Patients receive these treatments as oral pills or clinic injections.
- Side effects can happen, but they vary by person and doctors can help you manage them.
- Talking openly with your doctor about any concerns or symptoms is vital for your health.
When to Seek Emergency Help
While undergoing cancer treatment, contact your doctor right away or call 911 (US/Canada) or 999 (UK) or go to your nearest Emergency Department if you experience severe chest pain, sudden trouble breathing, signs of a severe allergic reaction like facial swelling, or sudden high fever with shaking chills.
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