“Chemo brain,” also known as “chemo fog” is more clinically referred to as chemotherapy-related cognitive impairment or cognitive dysfunction. The term refers to a range of cognitive changes that some cancer patients experience during and after chemotherapy treatment, often for many years. It is characterized by difficulties with memory, concentration, attention, and the ability to multitask, which can impact the ability to perform the tasks of their occupation, as well as their quality of life.

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The exact mechanisms underlying chemo brain are not fully understood, but researchers believe that chemotherapy drugs may affect the structure and function of the brain, leading to changes in neuronal connectivity, neurotransmitter levels, and brain inflammation. These changes can disrupt cognitive processes and result in the cognitive symptoms associated with “chemo brain.”

Chemo brain presents significant challenges for disability claims, as it is difficult to provide diagnostic tests that show a clear cause and effect. The disability insurance company may deny the claim, stating that there’s no hard evidence of the condition. The symptoms may not be measurable in a blood test or on an x-ray, but they are real.


Symptoms of chemo brain can vary from mild to severe and may include:


  • Memory problems: Patients may experience difficulty remembering recent events, names, dates, or details of conversations.
  • Concentration and attention difficulties: Patients may find it challenging to focus on tasks, stay organized, or maintain attention for extended periods.
  • Word-finding difficulties: Patients may struggle to recall words or express themselves verbally, leading to difficulty in communication.
  • Slowed thinking: Patients may notice a decrease in processing speed, making it take longer to complete tasks or respond to stimuli.
  • Multitasking difficulties: Patients may find it challenging to juggle multiple tasks simultaneously, leading to decreased productivity and efficiency.

Chemo brain can occur during chemotherapy treatment, shortly after treatment ends, or persist for months or even years following completion of treatment. The severity and duration of symptoms can vary among individuals, with some patients experiencing only mild cognitive changes while others may struggle with more significant impairments.


Managing chemo brain involves several approaches, including:

  • Cognitive rehabilitation: Working with a cognitive therapist or neuropsychologist to develop strategies to improve memory, attention, and executive function.
  • Lifestyle modifications: Engaging in regular physical exercise, maintaining a healthy diet, getting adequate sleep, and practicing stress management techniques can support overall brain health and cognitive function.
  • Mental exercises: Engaging in activities that challenge the brain, such as puzzles, memory games, or learning new skills, may help improve cognitive function and offset some of the effects of chemo brain.
  • Supportive care: Seeking support from healthcare professionals, support groups, or counseling services can provide emotional support and teach coping strategies for managing the cognitive and emotional challenges associated with chemo brain.

While chemo brain can be a frustrating and distressing side effect of chemotherapy, some patients find that symptoms improve over time with appropriate management and support. For others, the diminished executive functions makes it impossible to continue with their work.  

If you have had chemotherapy treatment and are unable to manage the mental or emotional challenges of your job and are considering filing a long term disability insurance claim, you are invited to call Newfield Law Group at 877-557-5830. The call is free, there’s no obligation and you’ll learn valuable information about your disability claim and your options.

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