Consumer Medicine Information
What is in this leaflet
This leaflet answers some common questions about Gilmat.
The information in this leaflet was last updated on the date listed on the final page. More recent information on the medicine may be available.
You should ensure that you speak to your pharmacist or doctor to obtain the most up to date information on the medicine.
Those updates may contain important information about the medicine and its use of which you should be aware.
It does not contain all the available information. It does not take the place of talking to your doctor or pharmacist.
All medicines have risks and benefits. Your doctor has weighed the risks of you taking this medicine against the benefits they expect it will provide.
If you have any concerns about this medicine, ask your doctor or pharmacist.
Keep this leaflet with the medicine. You may need to read it again.
What Gilmat is used for
Gilmat is used to treat adults and children/adolescents who have chronic myeloid leukaemia (CML)and acute lymphoblastic leukaemia with Philadelphia chromosome positive (Ph-positive ALL).
CML and ALL are types of leukaemia in which an abnormal chromosome produces an enzyme that leads to uncontrolled growth of white blood cells. Gilmat kills the abnormal cells while leaving normal cells alone.
Gilmat is also used to treat adults for:
- myelodysplastic / myeloproliferative diseases (MDS/MPD).
These are a group of blood diseases in which some blood cells start growing out of control
- Hypereosinophilic syndrome (HES) and or chronic eosinophilic leukaemia (CEL).
These are blood diseases in which some blood cells, named "eosinophils", start growing out of control.
- dermatofibrosarcoma protuberans (DFSP).
DFSP is a cancer of the tissue beneath the skin in which some cells start growing out of control.
Gilmat works by slowing the growth of abnormal cells. Gilmat kills the abnormal cells while leaving normal cells alone.
Ask your doctor if you have any questions about why this medicine has been prescribed for you. Your doctor may have prescribed it for another purpose.
Gilmat is only available with a doctor's prescription. It is not addictive.
There is not enough information to recommend the use of Gilmat in children under 3 years of age for most uses. For use in CML, there is no experience with the use of Gilmat in children below 2 years of age. For acute lymphoblastic leukaemia with Philadelphia chromosome positive (Ph-positive ALL), there is no experience with the use of Gilmat in children below 1 year of age.
Before you take Gilmat
When you must not take it
Do not take Gilmat if you have ever had an allergic reaction to imatinib (the active ingredient) or to any of the other ingredients listed at the end of this leaflet.
Some of the symptoms of an allergic reaction may include shortness of breath, wheezing or difficulty breathing; swelling of the face, lips, tongue or other parts of the body; rash, itching or hives on the skin.
Do not take Gilmat after the expiry date printed on the pack or if the packaging is torn or shows signs of tampering. In that case, return the medicine to your pharmacist.
Before you start to take it
Tell your doctor if you are pregnant or planning to become pregnant. This medicine may be harmful to your unborn baby. If it is necessary for you to take it during pregnancy, your doctor will discuss with you the risks and benefits involved.
Tell your doctor if you are breast-feeding. It is not known if the active ingredient, imatinib, passes into the breast milk. Because this medicine could affect your baby, breast- feeding is not recommended.
Tell your doctor if you have ever had any of the following medical problems or procedures:
- kidney or liver problems
- problems with your heart
- you have had your thyroid gland removed
- hepatitis B infection. As during treatment with Gilmat, hepatitis B (an infection of the liver) may become active again.
Your doctor may want to take special precautions in that case.
Taking other medicines
Tell your doctor if you are taking any other medicines, including medicines that you buy without a prescription from a pharmacy, supermarket or health food shop.
Some medicines and Gilmat may interfere with each other. These include many medicines that are eliminated from the body through the liver:
- St. John's wort, a herbal medicine found in many products that you can buy without a prescription
- paracetamol, a medicine found in many common pain relievers and cold remedies (e.g. Panadol®, Panadeine®, Codral®, Tylenol®) which are known to be associated with liver toxicity.
A patient, who was taking paracetamol regularly for fever, died of acute liver failure. Although the cause is currently unknown, special caution should be exercised when using paracetamol and Gilmat.
- antibiotic medicines such as rifampicin, ketoconazole, erythromycin, clarithromycin, itraconazole
- antiviral medicines used to treat HIV/AIDS
- dexamethasone, a steroid medicine
- medicines for high cholesterol, such as simvastatin
- medicines used to treat epilepsy, such as phenytoin, carbamazepine, phenobarbitone
- warfarin, a medicine used to prevent blood clots
- some medicines used to treat mental disorders and depression
- some medicines used to treat high blood pressure and heart problems
You may need to take different amounts of these medicines or you may need to take different medicines. Your doctor and pharmacist have more information.
If you have not told your doctor about any of these things, tell him/ her before you start taking this medicine.
How to take Gilmat
Follow all directions given to you by your doctor and pharmacist carefully.
These instructions may differ from the information contained in this leaflet.
If you do not understand the instructions on the label, ask your doctor or pharmacist for help.
How much to take
For CML, the usual dose for an adult is 400 to 600 mg each day and the maximum dose is 800 mg each day. The dose depends on what stage of CML you have. For Ph-positive ALL the usual dose is 600 mg each day. For children treated with CML and Ph-positive ALL, the dose depends on the size of the child.
For MDS/MPD, the starting dose is 400 mg.
For HES/CEL, the usual starting dose is 400 mg. For some patients the starting dose may be 100 mg.
For DFSP, the starting dose is 800 mg per day.
Daily dose of 400 mg should be taken as one tablet of 400 mg once a day.
Daily dose of 600 mg should be taken as either:
- six tablets of 100 mg or
- one tablet of 400 mg plus half a 400 mg tablet once a day.
Daily dose of 800 mg should be taken as 400 mg twice a day, in the morning and in the evening.
Your doctor may direct you to take a higher or lower dose, or stop treatment if needed depending on your response to Gilmat.
Gilmat is usually taken as a single dose each day. However, your doctor may want you to take them in two doses, one in the morning and one in the evening.
How to take it
Take the medicine with a large glass of water and food. This will help to avoid irritating the lining of your oesophagus (food pipe) and stomach.
If you are unable to swallow the tablets:
- Put the required tablet(s) in a glass of water or apple juice (approximately 50 ml for a100 mg tablet and 200 ml for a 400 mg tablet).
- Stir with a spoon to completely disperse the tablet(s). You are advised that it is likely to take prolonged sti
rring, up to 40 minutes for tablets to disperse completely.
- Immediately drink the whole contents of the glass.
- If you see an undissolved white or yellow residue in the glass, do not worry, this is not imatinib, just part of ingredient of tablet that does not dissolve.
- Other drinks such as milk, orange juice or cola must be avoided as they react with the medicine.
For the best effect, take the medicine at about the same time each day. Taking them at the same time each day will help you to remember to take them.
How long to take it
Continue taking Gilmat every day for as long as your doctor prescribes.
Your doctor will keep a close check on you to make sure you are still benefiting from treatment.
If you forget to take it
Take the missed dose as soon as you remember, then continue with your normal schedule.
Do not take a double dose to make up for the one that you missed. This may increase the chance of you getting an unwanted side effect.
If you are not sure what to do, ask your doctor or pharmacist.
If you have trouble remembering when to take your medicine, ask your pharmacist for some hints.
If you take too much (Overdose)
Immediately telephone your doctor or the Poisons Information Centre (telephone number 13 11 26), or go to Accident and Emergency at your nearest hospital if you think that you or anyone else may have taken too much Gilmat. Do this even if there are no signs of discomfort or poisoning. Keep the telephone numbers for these places handy.
While you are taking Gilmat
Things you must do
Make sure you follow your doctor's instructions carefully and keep all appointments. You will need regular follow-up to make sure the treatment is working. Regular blood tests and weight checks can also find side effects before they become serious.
Some children and adolescents taking Gilmat may have slower than normal growth. Growth will be monitored at regular visits by your doctor.
Make sure you use a method of contraception to prevent pregnancy during treatment with Gilmat. Tell your doctor immediately if you become pregnant while you are taking this medicine.
If you are about to be started on any new medicine, remind your doctor and pharmacist that you are taking Gilmat.
Tell any other doctor, dentist or pharmacist who treats you that you are taking Gilmat.
Things you must not do
Do not give this medicine to anyone else even if their condition seems to be the same as yours.
Do not use it to treat any other complaints unless your doctor tells you to.
Things to be careful of
Avoid drinking grapefruit juice while you are being treated with Gilmat. Grapefruit juice may interact with Gilmat and affect how your body uses this medicine.
If you need to take something to treat a headache, cold or other minor aches and pains, try to avoid taking medicines containing paracetamol (e.g. Panadol®, Panadeine®, Codral®, Tylenol®).
Ask your pharmacist to suggest an alternative medicine.
Be careful driving, operating machinery or doing jobs that require you to be alert until you know how Gilmat affects you. This medicine may cause dizziness, light-headedness or drowsiness in some people. Make sure you know how you react to it before you drive a car, operate machinery or do anything that could be dangerous.
When you are outdoors, wear protective clothing and use at least a 15+ sunscreen. Do not use a sunlamp. This medicine may cause your skin to be much more sensitive to sunlight than it normally is.
Exposure to sunlight may cause a skin rash, itching, redness or severe sunburn. If your skin does appear to be burning, tell your doctor.
Tell your doctor or pharmacist as soon as possible if you do not feel well while you are taking Gilmat.
All medicines can have side effects. Sometimes they are serious, most of the time they are not. You may need medical treatment if you get some of the side effects.
Do not be alarmed by these lists of possible side effects.You may not experience any of them. Ask your doctor or pharmacist to answer any questions you may have.
Tell your doctor if you notice any of the following side effects and they worry you:
- swelling of fingers, eyelids, face or lower legs due to fluid build up (see your doctor immediately if fluid build up is severe)
- indigestion, upset stomach, wind, feeling of bloating
- nausea (feeling sick) or vomiting
- dry mouth
- swelling, aching, cramping or stiffness in joints or muscles
- pain in the bones or along veins
- dizziness, light-headedness or vertigo (spinning sensation)
- tiredness, weakness, feeling generally unwell
- numbness, coldness or tingling in fingers and toes
- difficulty sleeping, feeling anxious, depressed, confused or forgetful
- change in sense of taste
- rash, eczema, itching, dry skin, darkening or lightening of skin
- symptoms of sunburn (such as redness, itching, swelling or blistering of the skin) which happens more quickly than normal
- irritated, red, runny or itchy eyes, blurred vision
- ringing in the ears
- changes in appetite and weight
- hair loss
- sweating during the night
- throat pain
- cough or cold symptoms
- loss of interest in sex, problems with sexual functions
- breast enlargement, nipple pain, painful periods
- reddening and/or swelling on the palms of the hands and soles of the feet which may be accompanied by tingling sensation and burning pain
- slowing of growth in children and adolescents
Tell your doctor immediately if you get any of the following side effects:
- severe allergic reaction that can result in difficulty breathing, dizziness.
- rapid weight gain, swelling of the extremities (calves, ankles), generalized swelling such as swelling of the face (signs of water retention)
- weakness, spontaneous bleeding or bruising, frequent infections with signs such as fever, chills, swollen glands, sore throat or mouth ulcers (signs of low level of blood cells)
- pale skin, tiredness, breathlessness, dark urine (signs of break down of red blood cells).
- pain and having difficulty walking
- cough, difficult or painful breathing, wheezing, pain in chest when breathing (signs of lung infections/disorders).
- muscle weakness, muscle spasms, abnormal heart rhythm (signs of changes in level of potassium in the blood).
- muscle spasms, fever, red-brown urine, kidney disorders, pain or weakness in muscles (signs of muscle disorders)
- severe abdominal pain, vomiting blood, black or bloody stools, swelling of the abdomen/fluid within the abdomen, constipation, stomach pain (signs of gastrointestinal disorders
- thirst, weight loss and severely decreased urine output (signs of low intake of drinks/fluids)
- nosebleeds or any other unusual bleeding
- vision impairment, blurred vision, blood in eye
- nausea, loss of appetite, dark-coloured urine or yellowing of your skin or eyes (signs of liver disorders).
- nausea, diarrhoea, vomiting, abdominal pain, fever (signs of inflammatory bowel disease).
- severe rash, red skin, blistering of the lips, eyes, skin or mouth, skin peeling, fever, red raised or purple skin patches, itching, burning, pustular eruption(signs of skin disorder).
- severe skin rash, itching, hives, blisters or peeling skin, which may be accompanied by fever, chills, headache, swollen glands, stomach pain or aching joints and muscles
- inflammation of the skin caused by an infection (sign of cellulitis)
- blood in the urine
- severe headache, weakness or paralysis of limbs or face,
difficulty speaking, sudden loss of consciousness (signs of nervous system disorder such as bleeding or swelling in the brain)
- seizures (fits)
- swelling and pain in one part of the body (signs of clots in blood vessels)
- crushing chest pain, fever, tiredness, irregular heart beat(signs of heart disorders such as heart attack, angina).
- muscle weakness, muscle spasms, abnormal heart rhythm(signs of changes in level of potassium in the blood)
- pelvic pain sometimes accompanied by nausea and vomiting, unexpected vaginal bleeding, (signs of gynaecological disorder)
- nausea, shortness of breath, irregular heartbeat, clouding of urine, tiredness and/or joint discomfort associated with abnormal laboratory (such as high potassium, uric acid, and phosphorous levels and low calcium levels in the blood)
- severe headache, dizziness, blurred vision (signs of increased pressure inside skull)
- fever, skin rash, joint pain and swelling as well as tiredness, loss of appetite, nausea, jaundice (yellowing of the skin), pain in the upper right abdomen, pale stools and dark urine (potential signs of hepatitis B reactivation).
The above side effects may be serious. You may need urgent medical attention
Tell your doctor if you notice anything else that is making you feel unwell. Other side effects not listed here or not yet known may happen in some people. Some of these side effects can only be found by laboratory testing.
After taking Gilmat
- Keep your medicine in the original container until it is time to take it.
- Store it in a cool dry place.
- Do not store Gilmat or any other medicine in the bathroom or near a sink.
- Do not leave it in the car or on window sills.
Keep the medicine where young children cannot reach it. A locked cupboard at least one-and-a-half metres above the ground is a good place to store medicines.
If your doctor tells you to stop taking this medicine or the expiry date has passed, ask your pharmacist what to do with any medicine you have left over.
What it looks like
Gilmat 100 mg film-coated tablet is a white to off-white coloured, round, bevel edged scored tablets debossed with H on one side and 19 on the other side, 1 and 9 separated by a score line.
Gilmat 400mg film-coated tablet is a white to off-white coloured, capsule shaped, bevel edged scored, film-coated tablets debossed with H on one side and 20 on the other side, 2 and 0 separated by a score line.
Gilmat tablets contain 100 mg or 400 mg of imatinib. Gilmat tablets also contain:
- magnesium stearate
- Opadry white 03F58763 (ARTG ID: 111313)
Pharmacor Pty Ltd
Suite 803, Tower A, The Zenith,
821 Pacific Highway,
Chatswood NSW 2067
Phone: 1300 138 805
® = Registered Trademark
Australian Registration Numbers
Gilmat 100 mg Tablets
Blister packs of 60, 90 and 120 AUST R 281036
HDPE bottles of 60 and 90 AUST R 264718
Gilmat 400 mg Tablets
Blister packs of 30 AUST R 264758
HDPE bottles of 30 AUST R 264778
This leaflet was prepared in November 2019.
Published by MIMS January 2020