A new clinical trial has found that regular exercise and low-dose ibuprofen may help reduce cognitive problems commonly experienced by cancer patients undergoing chemotherapy, offering fresh hope to those struggling with “chemo brain.”
The Phase II study, published online by American Cancer Society in its peer-reviewed journal CANCER, explored how simple lifestyle and medication interventions could improve cognitive function during treatment.
Chemotherapy is widely used to treat cancer, but it can also cause a condition commonly known as chemo brain, affecting up to 80% of patients. Symptoms often include difficulty concentrating, forgetfulness, slowed thinking, and trouble managing multiple tasks.
Researchers say the findings highlight promising, accessible ways to reduce these side effects and improve patients’ quality of life.
What Is ‘Chemo Brain’? Understanding Cancer-Related Cognitive Impairment
The medical term for chemo brain is Cancer-Related Cognitive Impairment (CRCI).
This condition typically appears during or after chemotherapy and causes mild to moderate cognitive difficulties, including:
- Trouble focusing or paying attention
- Short-term memory problems
- Difficulty multitasking
- Reduced mental clarity or “brain fog”
For some patients, these symptoms last months or even years, affecting their work, relationships, and daily functioning.
Experts believe inflammation plays a major role in CRCI. Chemotherapy can trigger widespread inflammation in the body, which may disrupt normal brain function.
Exercise and ibuprofen may help counter this inflammation in different ways:
- Exercise boosts blood flow and stimulates natural anti-inflammatory responses.
- Ibuprofen, a common non-steroidal anti-inflammatory drug (NSAID), blocks certain inflammatory chemicals.
Researchers hypothesised that combining these interventions could help protect brain function during treatment.
Inside The Study: How Researchers Tested The Interventions
The trial was led by Michelle C. Janelsins from the University of Rochester and Wilmot Cancer Institute.
A total of 86 cancer patients undergoing chemotherapy and experiencing cognitive problems were randomly assigned to one of four groups for a six-week trial:
- Exercise plus low-dose ibuprofen
- Exercise plus placebo
- Ibuprofen only
- Placebo only
The exercise program used in the study was the Exercise for Cancer Patients (EXCAP) program — a home-based routine involving:
- Low-to-moderate walking
- Light resistance exercises
- Bodyweight movements
Participants in the ibuprofen groups received 200 mg of ibuprofen three times daily. Importantly, researchers reported no serious side effects linked to the interventions during the study period.
Cognitive function was measured using tests such as the Trail Making Test, along with patient surveys and feedback from caregivers or family members.
Key Findings: Exercise Showed The Most Consistent Benefits
The results showed encouraging improvements, particularly among participants who exercised.
Key outcomes included:
- The exercise-plus-placebo group demonstrated significantly better attention scores than the placebo group.
- Participants completed cognitive tasks faster and more accurately.
- The ibuprofen-only group also showed improvements in attention, though slightly less pronounced.
- Both exercise groups reported fewer real-life cognitive slip-ups, according to feedback from friends and family.
Interestingly, short-term verbal memory improved less among those taking ibuprofen compared to those who did not, suggesting that further research is needed to fully understand its effects.
Overall, exercise produced the strongest and most consistent improvements.
Janelsins noted:
“We are encouraged by the findings of this trial that suggest possible benefits of both interventions for some cognitive domains. Clearly, we saw a more pronounced effect with exercise.”
She added that this research is among the first studies specifically designed to test these interventions during chemotherapy using both objective testing and patient-reported outcomes.
Why Exercise And Ibuprofen May Help
Scientists believe the benefits come from biological mechanisms that protect the brain during chemotherapy.
Exercise benefits include:
- Reducing inflammation
- Increasing blood flow to the brain
- Supporting the growth of new brain cells
- Improving processing speed and mental clarity
Previous research has already linked physical activity to better cognitive performance after chemotherapy.
Ibuprofen benefits include:
- Blocking inflammatory signals triggered by chemotherapy
- Reducing swelling that can interfere with brain function
While the combination of exercise and ibuprofen did not show clear added synergy in this trial, researchers believe longer studies may reveal stronger combined effects.
More Research Needed Before Clinical Guidelines Change
Although the results are promising, researchers emphasise that larger Phase III trials are required before these interventions become standard recommendations.
The study included patients with different types of cancer, making the findings broadly relevant across cancer populations.
Experts believe the results could eventually help shape new supportive care strategies aimed at improving patients’ cognitive health during chemotherapy.