Colorectal Cancer – Treating Side Effects. Colorectal cancer treatment can be lifesaving — but it often comes with a range of side effects that affect quality of life during and after therapy. This post is designed to help patients, caregivers, and advocates understand common adverse effects from colorectal cancer treatments (surgery, chemotherapy, radiation, targeted therapy), and what evidence-based strategies exist to reduce risk before treatment, identify side effects early, and manage them effectively if they occur.
Many of the integrative therapies highlighted below have research showing they can improve treatment tolerance and overall wellbeing. These are not alternatives to conventional cancer care — rather, they are complementary approaches to support better outcomes when used safely under medical supervision.
I am a long-term survivor of an incurable blood cancer called multiple myeloma.Despite the fact that my cancer and treatments were very different from bladder cancer therapies, complementary and integrative therapies to prevent or heal side effects are often the same. I use acupuncture to manage my pain, brain exercises to improve chemobrain, and nutrition to support recovery and long-term health.
The three therapies below are the most complete forms of side effect prevention according to research:
Please give serious attention to the integrative therapies listed at the bottom of this post. In my 30-plus years surviving my cancer, long-term and late-stage side effects have dramatically affected my life. No, conventional therapies did not put me into remission. It was a controversial non-FDA-approved therapy that put me in complete remission in 1999, where I have remained since.
Please scroll down the page, post a question or comment, and I will reply to you ASAP.
Hang in there,
David Emerson
- Cancer Survivor
- Cancer Coach
- Director PeopleBeatingCancer
Common Side Effects in Colorectal Cancer Treatment
Colorectal cancer treatments vary depending on stage and therapy type, but many patients experience some combination of the following:
1. Fatigue
Persistent tiredness is one of the most frequently reported side effects during chemotherapy, after major surgery, and throughout radiation therapy.
2. Changes in Bowel Function
Because treatment affects the digestive tract directly, patients may experience diarrhea, constipation, urgency, or irregular bowel habits — during treatment and sometimes long after it ends.
3. Nausea and Vomiting
These are especially common with systemic chemotherapy regimens like FOLFOX (a combination of 5-FU, leucovorin, and oxaliplatin) used to treat colorectal cancer.
4. Loss of Appetite
Chemotherapy and radiation often reduce appetite, leading to possible weight loss and weakened strength.
5. Peripheral Neuropathy
Chemotherapy drugs like oxaliplatin — common in colorectal cancer treatment — can damage nerves, causing numbness and tingling in hands and feet.
6. Skin Changes and Rashes
Certain targeted therapies (e.g., anti-EGFR drugs) can cause dry skin, acneiform rash, and irritation.
7. Infection Risk
Chemotherapy suppresses the immune system, increasing the risk of infection.
8. Emotional and Psychological Distress
Anxiety, depression, and fear of recurrence are common emotional side effects during and after treatment.
Why Proactive Side-Effect Prevention Matters
Research indicates that prehabilitation — preparing the body and mind before cancer treatment begins — can reduce side effects and improve outcomes. The goal of prehabilitation is to increase physical fitness, nutritional reserves, and emotional resilience so that patients are better equipped to tolerate surgery and chemotherapy with fewer complications.
Integrative Therapies Backed by Evidence
Below are supportive approaches shown in clinical studies or observational research to help reduce toxicity from treatment, improve recovery, or manage specific side effects:
💪 Prehabilitation (Before Treatment Begins)
Building baseline strength and metabolic reserve through tailored exercise, nutrition planning, and stress reduction may:
- Reduce complications after surgery
- Improve recovery and treatment tolerance
- Help patients complete full chemo regimens without added toxicity