Like all medicines, Granisetron tablets can cause side effects, although not everybody gets them. In case of the following problem the patient must see a doctor straight away: allergic reactions (anaphylaxis). The signs may include swelling of the throat, face, lips and mouth, difficulty in breathing or swallowing.
Other side effects that may be experienced while taking this medicine are: Very Common: affects more than 1 user in 10: headache; constipation. The doctor will monitor the patient's condition.
Common: affects 1 to 10 users in 100: problems sleeping (insomnia); changes in how the liver is working shown by blood tests; diarrhoea.
Uncommon: affects 1 to 10 users in 1,000: skin rashes or an allergic skin reaction or "nettle-rash" or "hives" (urticaria). The signs may include red, raised itchy bumps; changes in the heartbeat (rhythm) and changes seen on ECG readings (electrical recordings of the heart); abnormal involuntary movements, such as shaking, muscle rigidity and muscle contractions.
If any of the side effects gets serious, or if the patient notices any side effects not listed in the monograph, tell the doctor, nurse or pharmacist.