Temozolomide (Temodal)
Find out about the chemotherapy drug temozolomide, how you have it and other important information.
Temozolomide is also used to treat some types of brain tumours.
What is chemotherapy?
Chemotherapy uses anti cancer (cytotoxic) drugs to destroy cancer cells. The drugs circulate throughout the body in the bloodstream.
How does temozolomide work?
Temozolomide works by stopping cancer cells from making DNA. DNA stands for DeoxyriboNucleic Acid. It is the genetic material of a cell.
If the cancer cells can't make DNA, they can't split into 2 new cells, so the cancer can't grow.
How you have temozolomide
Temozolomide is a capsule. You should swallow them whole with a glass of water. You should take them on an empty stomach, 1 hour before or after meals.
Store the capsules in a safe place away from children.
Taking your tablets or capsules
You must take tablets and capsules according to the instructions your doctor or pharmacist gives you.
Whether you have a full or empty stomach can affect how much of a drug gets into your bloodstream.
You should take the right dose, not more or less.
Talk to your healthcare team before you stop taking a cancer drug, or if you have missed a dose.
Contact your doctor, pharmacist or nurse if you accidentlly take more temozolomide than you were told to.
And if you forget to take a dose take the missed dose as soon as possible during the same day. Check with your doctor if more than a day has gone by. Don't take a double dose to make up for the forgotten dose, unless your doctor tells you to do that.
Tests
You have blood tests before and during your treatment. They check your levels of blood cells and other substances in the blood. They also check how well your liver and kidneys are working.
Side effects
Find out about possible side effects of temozolomide and what to do if you have them.
Important information
Other medicines
Cancer drugs can interact with some other medicines and herbal products. Tell your doctor or pharmacist about any medicines you are taking. This includes vitamins, herbal supplements and over the counter remedies.
Pregnancy and contraception
This treatment might harm a baby developing in the womb. It is important not to become pregnant or get someone pregnant while you're having treatment and for a few months afterwards.
Talk to your doctor or nurse about effective contraception before starting treatment. Let them know straight away if you or your partner become pregnant while having treatment.
Breastfeeding
Don’t breastfeed during this treatment because the drug may come through into your breast milk.
Blood clots
You are more at risk of developing a blood clot during treatment. Drink plenty of fluids and keep moving to help prevent clots.
Other conditions
If you are having tests or treatment for anything else, always mention your cancer treatment. For example, if you are visiting your dentist.
Immunisations
Don’t have immunisations with live vaccines while you’re having treatment and for up to 12 months afterwards. The length of time depends on the treatment you are having.
Ask your doctor or pharmacist how long you should avoid live vaccinations.
In the UK, live vaccines include rubella, mumps, measles, BCG, and yellow fever.
You can usually have:
- other vaccines, but they might not give you as much protection as usual
- the flu vaccine (as an injection)
- the coronavirus (COVID-19) vaccine
Talk to your doctor or pharmacist about the best time to have a vaccine in relation to your cancer treatment.
Contact with others who have had immunisations
You can be in contact with other people who have had live vaccines as injections. If someone has had a live vaccine by mouth or nasal spray there may be a small risk the vaccine virus can be passed onto you if your 
is weakened.
Your healthcare team will let you know if you need to take any precautions if you are in close contact with someone who has had a live vaccine.
More information about this treatment
For further information about this treatment and possible side effects go to the electronic Medicines Compendium (eMC) website. You can find the patient information leaflet on this website.
You can report any side effect you have to the Medicines Health and Regulatory Authority (MHRA) as part of their Yellow Card Scheme.
