People with a brain tumour may have more problems with weight gain. Why? Some factors contributing to weight gain include:
- Lack of activity
- Living with a physical disability
- Treatment with dexamethasone and,
- Treatment with antiepileptic medications
Limiting weight gain is important because extra weight makes mobility harder, it is much harder to provide care for someone who is very heavy, and there is a higher risk of injury for both of you.
At some point Dexamethasone, a steroid medication, is almost always part of treatment for brain tumours. This medication can be a powerful appetite stimulant, making weight gain very difficult to avoid.
Some people also develop diabetes or pre-diabetes when they take dexamethasone, which may mean they must observe a diabetic diet.

“Kelly has been taking a new medication for about 3 weeks and has noticed she seems to be eating more than usual. When we asked her doctor about it they said that “Dexamethasone” as with many a steroid medications, can be a strong appetite stimulant, increasing her hunger. Many people also experience weight gain.
The doctor suggested we take some time to make sure there are healthy options like fruit, nuts, wholegrain crackers etc. for Kelly to snack on, rather than processed foods.
If we are still finding things difficult the doctor suggested we see a dietitian who can help us manage our family’s nutrition. We have a referral so that we can use it if we need to.”
How to manage weight gain
Try these tips to manage weight gain:
- Provide more fruit and vegetables
- Keep healthy snacks close at hand – carrot sticks, celery, or popcorn can be nibbled.
- Shop carefully and look at the energy content of processed foods
- Drink plain water
- Increase potassium intake – eat more fruit and vegetables to regulate body fluids
- Choose lean meats such as fish or chicken
- Try to encourage some daily exercise – look for community-based programs that are free or lower in cost.
Take note of these tips too:

- Less processed foods such as biscuits, ice cream, sweets and chips
- Reduce salt intake – cut down on processed foods such as potato chips, packaged meats, and pre-prepared meals or takeaway.
- Keep soft drinks and bottled juices out of the house.
- Reduce portion sizes. Using smaller plates and bowls may help.
- Eat less red meat.
- Cut back on added butter, fats, and sweets in the diet.
Talk to the GP about weight management or make an appointment with a dietitian if concerned.