Chemotherapy Basics: What Every Patient Should Know

Chemotherapy is one of the most well-known cancer treatments, yet for many Australians diagnosed with early-onset bowel cancer, it can feel overwhelming and unclear. Understanding what chemotherapy is, how it works, and what to expect can help you feel more prepared and in control of your journey.

This blog breaks down the chemotherapy basics, from how it’s used in bowel cancer treatment to tips for managing side effects, with a focus on Australian patients and support services available locally.

What Is Chemotherapy?

Chemotherapy (often shortened to “chemo”) refers to the use of drugs to kill or slow the growth of cancer cells. These drugs circulate through the bloodstream, making chemo a systemic treatment. That means it can affect cancer cells throughout the body, not just in one location.

Chemotherapy may be used:

• Before surgery (neoadjuvant chemotherapy) to shrink tumours
• After surgery (adjuvant chemotherapy) to destroy any remaining cancer cells
• As the main treatment when surgery isn’t possible
• Alongside other treatments like radiation or targeted therapies

In bowel cancer, chemotherapy is commonly used to reduce the risk of recurrence, especially in stages II, III and IV.

Common Chemotherapy Drugs Used in Bowel Cancer

In Australia, oncologists typically prescribe a combination of chemotherapy drugs based on the cancer’s stage, location and genetic features. Some of the most commonly used include:

• 5-Fluorouracil (5-FU) – Often given with leucovorin to enhance its effectiveness.
• Capecitabine (Xeloda) – An oral version of 5-FU.
• Oxaliplatin (Eloxatin) – Commonly combined with 5-FU in the FOLFOX regimen.
• Irinotecan – Part of the FOLFIRI regimen, often used in more advanced cases.

Regimens are usually given in cycles, with rest periods in between to allow your body to recover.

How Chemotherapy Is Given

Chemotherapy for bowel cancer is usually administered in one of two ways:

• Intravenous (IV) chemotherapy – Delivered through a drip directly into a vein at a hospital or cancer centre.
• Oral chemotherapy – Taken as pills or tablets at home, such as capecitabine.

Some patients may be given a central line, such as a port-a-cath or PICC line, to make frequent treatments easier and reduce the need for repeated needle insertions.

Treatment cycles often follow a fortnightly or three-weekly schedule, depending on your regimen. Each cycle may last a few months depending on the overall treatment plan.

What to Expect During Chemotherapy

Knowing what to expect can ease anxiety and help with planning. Here’s a basic overview of what the chemotherapy experience may involve:

• Pre-treatment appointments – Blood tests, scans and consultations to check you’re fit for chemo.
• Infusion sessions – These can take anywhere from 30 minutes to several hours.
• Monitoring and side effect management – Your team will regularly assess how you’re coping and adjust treatment if necessary.
• Post-treatment care – Instructions on staying hydrated, watching for signs of infection and tracking symptoms.

It’s a good idea to bring a support person to your appointments if you can, especially in the early stages when there’s a lot to take in.

Common Side Effects of Chemotherapy

Chemotherapy can affect healthy cells as well as cancer cells, leading to side effects. Not everyone experiences the same symptoms, and your experience may differ with each cycle.

Some common side effects include:

• Fatigue – One of the most universal side effects, often cumulative over time.
• Nausea and vomiting – Medications called antiemetics can help manage this.
• Diarrhoea or constipation – Gastrointestinal side effects are common with bowel cancer chemo.
• Peripheral neuropathy – Tingling, numbness or pain in hands and feet, especially with oxaliplatin.
• Mouth ulcers – A soft toothbrush and saltwater rinses can help.
• Hair thinning – Full hair loss is uncommon, but some thinning may occur.
• Low blood cell counts – This may lead to anaemia, bruising or a weakened immune system.

Always report new or worsening side effects to your team promptly. They can often be managed before they escalate.

Tips for Managing Side Effects

• Stay hydrated and eat small, frequent meals to manage nausea.
• Rest when needed, but also try to move around gently each day to combat fatigue.
• Wear gloves when handling cold items if you experience cold sensitivity from oxaliplatin.
• Keep a diary of symptoms to track patterns and report issues.
• Ask about medications to manage side effects proactively (e.g., anti-nausea, laxatives, mouth rinses).
• Protect your immune system by avoiding people who are sick and practicing good hygiene.

Your care team can refer you to dietitians, psychologists or allied health professionals for additional support. Bowel Cancer Australia also offers a Nutrition & Wellbeing service tailored to bowel cancer patients.

Work, Family and Lifestyle Considerations

Chemo can impact your daily routine. Here are some things to consider:

• Talk to your employer early about flexible work options or taking leave. You may be eligible for financial support through Centrelink or your superannuation.
• Arrange childcare or help at home, particularly during your chemo weeks.
• Let friends and family help – with meals, errands or emotional support.
• Plan low-key activities that bring joy or distraction during rest days.

It’s okay to ask for help. In fact, building a support network can make a huge difference to your experience.

Fertility and Sexual Health

For younger patients, chemotherapy can have an impact on fertility and sexual health. It’s important to raise these topics with your oncology team before treatment begins.

• Fertility preservation options such as sperm banking or egg/embryo freezing may be available.
• Sexual function and intimacy may be affected by fatigue, hormonal changes or body image concerns.

Support services such as Cancer Council’s sexual health advisors or fertility specialists can help navigate these sensitive areas with care.

How Chemotherapy Is Monitored

Throughout chemotherapy, your team will monitor your progress with:

• Blood tests to check your liver function, kidney health and blood cell counts.
• Scans such as CT or MRI to track tumour size and response.
• Symptom check-ins to adjust doses or medications if side effects become difficult.

If chemo isn’t working as hoped or causes significant side effects, your team may recommend a different regimen or additional therapies, such as targeted treatments or immunotherapy.

When Chemotherapy Ends: What’s Next?

Finishing chemo is a huge milestone, but it’s not always the end of the road. After treatment, your care plan might include:

• Ongoing surveillance with regular scans and blood tests (CEA tests).
• Follow-up appointments to check recovery and discuss any late effects.
• Referral to allied health services to support physical and emotional recovery.
• Exploring survivorship support, such as those offered by Bowel Cancer Australia or local cancer wellness centres.

Many people experience “scanxiety” or emotional ups and downs post-treatment, this is entirely normal and worth discussing with your GP or psychologist.

Key Questions to Ask Your Oncology Team

• What chemotherapy regimen are you recommending and why?
• How long will treatment last and what’s the schedule?
• What side effects should I look out for and how are they managed?
• Will chemo affect my fertility or ability to have children?
• Can I keep working or exercising during treatment?
• Are there clinical trials available to me?
• What support services can I access during treatment?

If you’re unsure about anything, don’t hesitate to ask for clarification. There’s no such thing as a silly question when it comes to your health.

Support Services and Resources

• Bowel Cancer Australia – Offers tailored support including a Nutrition & Wellbeing service, nurse helpline, peer support groups and fact sheets.
• Cancer Council 13 11 20 – General cancer support including emotional, legal and financial advice.
• Carer Gateway – For carers needing information and respite support.
• Palliative Care Australia – If chemo is being used to manage symptoms rather than cure, palliative care can support quality of life.

Check if your hospital also has a cancer nurse coordinator or patient navigator, they can be a valuable point of contact during treatment.

Final Thoughts

Chemotherapy can be a daunting word, but understanding the basics helps take some of the fear out of the unknown. Whether you’re just beginning treatment, part-way through, or supporting someone you care about, information, planning and support can make a big difference.

Remember, your experience with chemo will be unique. Lean on your care team, ask for help and stay connected to resources like Bowel Cancer Australia.