Browser does not support script.
Skip to main content
search here
Macmillan and Cancerbackup merged in 2008. Together we provide free, high quality information for people affected by cancer through our publications, website and phone service. Find out more|.
Find out how we produce our information|
Before and after brain surgery, you'll be given steroid therapy and often medicines known as anticonvulsant drugs to help to prevent seizures.
Steroids| are drugs that are used to reduce the swelling that often surrounds brain tumours. Although steroids don't treat the tumour itself, they help to improve symptoms and make you feel better. They may be used before or after surgery|, or during or after radiotherapy|.
If you are taking steroids for some time, you may have temporary side effects. These can include putting on weight, indigestion, raised blood pressure and a slightly greater risk of getting infections|, such as thrush (candida) in the mouth. Some people also have mood changes, feel low or depressed, find it difficult to get to sleep or feel 'hyper' or over-active.
You may also develop a higher than normal level of sugar in the blood. If this happens, your doctor will prescribe drugs which you will need to take every day to bring your blood sugar level back to normal. You may have to do a simple daily test to check for sugar in your urine. You'll be shown how to do this.
If you take steroids for a long time you may notice that you put on weight or that your thigh muscles are weaker. Your skin may bruise more easily and feel thinner.
These side effects may seem hard to bear at the time, but it's important to remember that they are temporary and will gradually disappear as the steroid dose is lowered. While you are having steroid treatment you should carry a steroid card (which your doctor or nurse will give you) to show the type of steroid and the dose you are taking.
It's important not to stop taking steroids suddenly as this can make you very ill. Your doctor will gradually reduce the dose.
If you have had seizures or fits you may also have to take anticonvulsants (drugs to prevent epileptic fits). These medicines are often used for people who have brain tumours and also after brain surgery.
There are several different types of anticonvulsants. Some commonly used types include phenytoin (Epanutin®), Levetiracetam (Keppra®), carbamazepine (Tegretol®), sodium valproate (Epilim®) and lamotrigine (Lamictal®). Let your doctor know if you have any side effects. Sometimes it's necessary to take more than one type of anticonvulsant tablet.
For answers, support or just a chat, call the Macmillan Support Line free (Monday to Friday, 9am-8pm)
If you have any questions about cancer, need support or just want someone to talk to, ask Macmillan.