1. Home
  2. Medical oncology
  3. Breast
  4. Neoadjuvant/Adjuvant
  5. 4168-Breast adjuvant abemaciclib

Patient information - Breast cancer adjuvant - Abemaciclib

On this page
Expand all Collapse all Back to top

This information sheet outlines your treatment. It should be reviewed together with your doctor, nurse or pharmacist to address any questions or concerns.

The treatment schedule below explains when you will receive the medicines and how they are given.  Your doctor, nurse or pharmacist will be able to explain how your treatment works in more detail.

It is important to understand that abemaciclib is not a traditional chemotherapy drug and has a different way of working. It works by targeting the cancer cells to stop them growing and spreading. The treatment schedule below explains how the drug for this treatment is given. 

Abemaciclib
This treatment is continuous for 2 years. Do not stop taking abemaciclib tablets without telling your doctor.
Day Treatment How it is given
Continuous Abemaciclib (uh-BEH-muh-SYE-klib​)

Take orally TWICE a day at the same time each day, 12 hours apart.
Swallow the tablets whole with a glass of water. Do not break, crush or chew.
If you forget to take a dose or vomit a dose, take your normal dose the next time it is due. Do not take an extra dose.

Abemaciclib is available as 50 mg, 100 mg and 150 mg tablets. It is important that you take the correct number of tablets and understand how to take them. Ask your doctor, nurse or pharmacist to complete the table below with the correct number of tablets for you:

Abemaciclib Morning Evening
50 mg tablets    
100 mg tablets    
150 mg tablets    

Abemaciclib is used in combination with hormonal therapy. Your doctor will discuss your treatment plan with you.

Anticancer drugs (drugs used to treat cancer) can sometimes cause serious problems. It is important to get medical help immediately if you become unwell.

Emergency

IMMEDIATELY go to your nearest hospital Emergency Department, or contact your doctor or nurse if you have any of the following at any time:

Emergency contact details

Ask your doctor or nurse from your treating team who to contact if you have a problem

 

  • a temperature of 38ºC or higher
  • chills, sweats, shivers or shakes
  • shortness of breath
  • uncontrolled vomiting or diarrhoea
  • pain, tingling or discomfort in your chest or arms
  • palpitations (fast and/or irregular heartbeat), dizziness or fainting
  • you become unwell.
Daytime:
Night/weekend:
Other instructions:

Changes to your dose or treatment delays

Sometimes a treatment may be started at a lower dose or the dose needs to be changed during treatment. There may also be times when your treatment is delayed. This can happen if your doctor thinks you are likely to have severe side effects, if you get severe side effects, if your blood counts are affected and causing delays in treatment, or if you are finding it hard to cope with the treatment. This is called a dose reduction, dose change or treatment delay. Your doctor will explain if you need any changes or delays to your treatment and the reason why.

Blood tests and monitoring

Anti-cancer drugs can reduce the number of blood cells in your body. You will need to have regular blood tests to check that your blood cell count has returned to normal. If your blood count is low, your treatment may be delayed until it has returned to normal. Your doctor or nurse will tell you when to have these blood tests.

Other medications given during this treatment

  • Antidiarrhoeals: you may be given some medication to treat diarrhoea. Your doctor or nurse will tell you how and when to take your antidiarrhoeal medication.
  • G-CSF: you may be given injection(s) of a drug called G-CSF (also called filgrastim) under your skin. This helps to boost your white blood cell count. Your white blood cells help to fight infection. G-CSF is given for several days until your white blood cells recover. Follow this link to read more information on how to give this injection opens in a new tab or window.

Cancer treatments can cause damage to normal cells in your body, which can cause side effects. Everyone gets different side effects, and some people will have more problems than others.

The table below shows some of the side effects you may get with this treatment. You are unlikely to get all of those listed and you may also get some side effects that have not been listed.

Tell your doctor or nurse about any side effects that worry you. Follow the instructions below and those given to you by your doctor or nurse.

Immediate (onset hours to days)

Nausea and vomiting

  • You may feel sick (nausea) or be sick (vomit).
  • Take your anti-sickness medication as directed even if you don’t feel sick.
  • Drink plenty of fluids (unless you are fluid restricted).
  • Eat small meals more frequently.
  • Try food that does not require much preparation.
  • Try bland foods like dry biscuits or toast.
  • Gentle exercise may help with nausea.
  • Ask your doctor or nurse for eviQ patient information - Nausea and vomiting during cancer treatment. 
  • Tell your doctor or nurse immediately, or go to the nearest hospital Emergency Department if you have uncontrolled vomiting or feel dizzy or light-headed.

Early (onset days to weeks)

Infection risk (neutropenia)

  • This treatment lowers the amount of white blood cells in your body. The type of white blood cells that help to fight infection are called neutrophils. Having low level of neutrophils is called neutropenia. If you have neutropenia, you are at greater risk of getting an infection. It also means that your body can’t fight infections as well as usual. This is a serious side effect, and can be life threatening.
  • Wash your hands often.
  • Keep a thermometer at home and take your temperature regularly, and if you feel unwell.
  • Do your mouth care regularly.
  • Inspect your central line site (if you have one) daily for any redness, pus or swelling.
  • Limit contact with people who are sick.
  • Learn how to recognise the signs of infection.
  • Ask your doctor or nurse for eviQ patient information - Infection during cancer treatment.
  • Tell your doctor or nurse immediately, or go to the nearest hospital Emergency Department if you get any of the following signs or symptoms:
    • a temperature of 38°C or higher
    • chills, shivers, sweats or shakes
    • a sore throat or cough
    • uncontrolled diarrhoea
    • shortness of breath
    • a fast heartbeat
    •  become unwell even without a temperature.

Low platelets (thrombocytopenia)

  • This treatment lowers the amount of platelets in your blood. Platelets help your blood to clot. When they are low, you are at an increased risk of bleeding and bruising.
  • Try not to bruise or cut yourself.
  • Avoid contact sport or vigorous exercise. 
  • Clear your nose by blowing gently.
  • Avoid constipation.
  • Brush your teeth with a soft toothbrush.
  • Don't take aspirin, ibuprofen or other similar anti-inflammatory medications unless your doctor tells you to.
  • Tell your doctor or nurse if you have any bruising or bleeding. 
  • Tell your doctor or nurse immediately, or go to your nearest hospital Emergency Department if you have any uncontrolled bleeding.

Diarrhoea

  • You may get bowel motions (stools, poo) that are more frequent or more liquid.
  • You may also get bloating, cramping or pain.
  • Take your antidiarrhoeal medication as directed by your doctor.
  • Drink plenty of fluids (unless you are fluid restricted).
  • Eat and drink small amounts more often.
  • Avoid spicy foods, dairy products, high fibre foods, and coffee.
  • Ask your doctor or nurse for eviQ patient information - Diarrhoea during cancer treatment. 
  • Tell your doctor or nurse immediately, or go to your nearest hospital Emergency Department if your diarrhoea is not controlled, you have 4 or more loose bowel motions per day, and if you feel dizzy or light-headed.

Tiredness and lack of energy (fatigue)

  • You may feel very tired, have no energy, sleep a lot, and not be able to do normal activities or things you enjoy.
  • Do not drive or operate machinery if you are feeling tired.
  • Nap for short periods (only 1 hour at a time)
  • Prioritise your tasks to ensure the best use of your energy.
  • Eat a well balanced diet and drink plenty of fluids (unless you are fluid restricted).
  • Try some gentle exercise daily.
  • Allow your friends and family to help.
  • Tell your doctor or nurse if you get any of the symptoms listed above.

Liver problems

  • You may get: 
    • yellowing of your skin or eyes
    • itchy skin 
    • pain or tenderness in your stomach
    • nausea and vomiting
    •  loss of appetite
  • You will have regular blood tests to check how well your liver is working.
  • Tell your doctor or nurse as soon as possible if you notice that your urine is a dark colour, the whites of your eyes look yellow, or if you have stomach pain.

Lung problems

  • Lung problems are rare, but can be serious. They may occur throughout treatment or after the completion of treatment. 
  • You may get:
    • shortness of breath
    • fever
    • dry cough
    • wheezing
    • fast heartbeat
    •  chest pain.
  • Your doctor will monitor how well your lungs are working during your treatment.
  • Tell your doctor or nurse immediately, or go to the nearest hospital Emergency Department if you have chest pain or become short of breath.

Late (onset weeks to months)

Hair thinning

  • Your hair may become dry and may break easily.
  • You may lose some of your hair.
  • Use a gentle shampoo and a soft hairbrush.
  • Take care with hair products like hairspray, hair dye, bleaches and perms.
  • Protect your scalp from the cold with a hat or scarf.
  • Protect your scalp from the sun with a hat and sunscreen of SPF 50 or higher.
  • Ask your doctor or nurse about the Look Good Feel Better opens in a new tab or window program (www.lgfb.org.au)

Low red blood cells (anaemia)

  • You may feel dizzy, light-headed, tired and appear more pale than usual.
  • Tell your doctor or nurse if you have any of these signs or symptoms. You might need a blood transfusion.
  • Tell your doctor or nurse immediately, or go to the nearest hospital Emergency Department if you have any chest pain, trouble breathing, or feel like your heart is racing.

Blood clots (thromboembolism)

  • Blood clots can occur with this treatment. 
  • Tell your doctor or nurse immediately, or go to the nearest hospital Emergency Department if you get any of the following signs or symptoms:
    • redness, heat or pain in your leg(s)
    • numbness or weakness in your face, arm or leg
    • chest pain
    • sudden shortness of breath
    • dizziness
    • trouble speaking
    • blurred vision
    • severe headache
    • unexplained falls or loss of balance.

Blood clot risk

  • Cancer and anticancer drugs can increase the risk of a blood clot (thrombosis).
  • Tell your doctor if you have a family history of blood clots.
  • A blood clot can cause pain, redness, swelling in your arms or legs, shortness of breath or chest pain.
  • If you have any of these symptoms go to your nearest hospital Emergency Department.

Medications and vaccinations

  • Before you start treatment, tell your doctor and pharmacist about any medications you are taking, including over-the-counter products, vitamins or herbal supplements. 
  • Don’t stop or start any medications during treatment without talking to your doctor and pharmacist first.
  • Paracetamol is safe to take if you have a headache or other mild aches and pains. It is recommended that you avoid taking aspirin, ibuprofen and other anti-inflammatory type medications for pain while you are having treatment. However, if these medications have been prescribed by your doctor, do not stop taking them without speaking with your doctor.
  • Do not have any vaccinations without discussing with the doctor who is managing your cancer treatment.
  • People you live with should be fully vaccinated, including having live vaccines according to the current vaccination schedule. Extra care needs to be taken with hand washing and careful disposal of soiled nappies for infants who have recently received the rotavirus vaccine.

Other medical and dental treatment

  • If you go to hospital or any other medical appointment (including dental appointments), always tell the person treating you that you are receiving anticancer drugs.
  • Before you have any dental treatment, talk to your doctor. 

Diet

  • While you are receiving this treatment it is important that you try to maintain a healthy diet.
  • Grapefruit and grapefruit juice can interact with your medication and should be avoided while you are on this treatment. 
  • Speak to your doctor or nurse about whether drinking alcohol is safe with your treatment.
  • If you have any concerns about recent weight loss or weight gain or questions about your diet, ask to speak to a dietitian.
  • Avoid drinking or cooking with untreated water (e.g. water from rainwater tanks, bores or rivers) due to risk of contamination. If you intend to drink or cook with rainwater, you should bring it to a boil and allow the water to cool down before drinking or cooking with it. For more information see the NSW Health - Rainwater tanks opens in a new tab or window webpage.

Sex life and sexuality 

  • The desire to have sex may decrease as a result of this treatment or its side effects. 
  • Your emotions and the way you feel about yourself may also be affected by this treatment. 
  • It may help to discuss your concerns with your partner and doctor or nurse.

Fertility

  • Some cancer treatments can reduce your fertility. This can make it difficult or impossible to get pregnant or father a child.
  • Talk to your doctor or nurse before you start any treatment. Depending on your situation there may be fertility sparing options available to you and/or your partner, discuss these with your doctor or nurse. 

Pregnancy and breastfeeding 

  • Some cancer treatments can be dangerous to unborn babies. Talk to your doctor or nurse if you think there is any chance that you could be pregnant.
  • Do not try to get pregnant or father a child during this treatment. Contraception should be used during treatment and after stopping treatment. Ask your doctor or nurse about what type of contraception you should use.
  • If you are planning pregnancy/fatherhood after completing this treatment, talk to your doctor. Some doctors advise waiting between 6 months and 2 years after treatment.
  • Do not breastfeed if you are on this treatment, as anti-cancer medications can also pass into breast milk.

Quitting smoking

  • It is never too late to quit smoking. Quitting smoking is one of the best things you can do to help your treatment work better.
  • There are many effective tools to improve your chances of quitting.
  • Talk to your treating team for more information and referral to a smoking cessation support service.

Staying active

  • Research shows that exercise, no matter how small, has many benefits for people during and after cancer treatment.
  • Talk to your doctor before starting an exercise program. Your doctor can advise whether you need a modified exercise program.

For more information about cancer treatment, side effects and side effect management see our Patient and carers section. 

Telephone support

  • Call Cancer Council on 13 11 20 for cancer information and support.

Breast cancer information

General cancer information and support

Quit smoking information and support

Quitting smoking is helpful even after you have been diagnosed with cancer. The following resources provide useful information and support to help you quit smoking. Talk to your treating team about any other questions you may have.

This document is a guide only and cannot cover every possible situation. Your treating team will consider your individual situation when making decisions about your care. Contact your doctor, nurse, pharmacist, or radiation therapist if you have any questions or concerns about your treatment, or you are having problems coping with side effects. While eviQ aims to provide reliable information, eviQ and the Cancer Institute NSW do not endorse or accept responsibility for the accuracy, currency, reliability or correctness of the content of linked external information sources. Use of this document is subject to eviQ’s disclaimer available at www.eviQ.org.au

Send feedback for this page

First approved:
Last reviewed:
Review due:

The currency of this information is guaranteed only up until the date of printing, for any updates please check:

https://www.eviq.org.au/pi/4168

25 Jul 2025