Very common or common side effects: −
Rapid weight gain – Imatinib may cause your body to retain water (severe fluid retention).
− Signs of infection such as fever, severe chills, sore throat or mouth ulcers- Imatinib can reduce the number of white blood cells.
− Unexpected bleeding or bruising.
Uncommon or rare side effects: −
Chest pain, irregular heart rhythm (signs of heart problems).
− Cough, having difficulty breathing or painful breathing (signs of lung problems).
− Feeling light-headed, dizzy or fainting (signs of low blood pressure).
− Feeling sick (nausea), with loss of appetite, dark-coloured urine, yellow skin or eyes (signs of liver problems).
− Rash, red skin with blisters on the lips, eyes, skin or mouth, peeling skin, fever, raised red or purple skin patches, itching, burning sensation, pustular eruption (signs of skin problems).
− Severe abdominal pain, blood in your vomit, stools or urine, black stools (signs of gastrointestinal disorders).
− Severely decreased urine output, feeling thirsty (signs of kidney problems).
− Feeling sick (nausea) with diarrhoea and vomiting, abdominal pain or fever (signs of bowel problems).
− Severe headache, weakness or paralysis of limbs or face, difficulty speaking, sudden loss of consciousness (signs of nervous system problems, such as bleeding or swelling in skull/brain).
− Pale skin, feeling tired and breathlessness and having dark urine (signs of low levels of red blood cells).
− Eye pain or deterioration in vision.
− Pain in hips or difficulty walking.
− Numb or cold toes and fingers (signs of Raynaud’s syndrome).
− Sudden swelling and redness of the skin (signs of a skin infection called cellulitis).
− Difficulty hearing.
− Muscle weakness and spasms with an abnormal heart rhythm (signs of changes in the amount of potassium in your blood).
− Bruising.
− Stomach pain with feeling sick (nausea).
− Muscle spasms with a fever, red-brown urine, pain or weakness in your muscles (signs of muscle problems).
− Pelvic pain sometimes with nausea and vomiting, with unexpected vaginal bleeding, feeling dizzy or fainting due to low blood pressure (signs of problems with ovaries or womb).
− Headache or feeling tired.
− Feeling sick (nausea), being sick (vomiting), diarrhoea or indigestion.
− Rash.
− Muscle cramps or joint, muscle or bone pain.
− Swelling such as round your ankles or puffy eyes.
− Weight gain.