Allopurinol-TEVA is taken by the majority of patients without any problems. However, like many other medicines, it may occasionally cause side effects in some people.
Skin rashes are the most common side effect with Allopurinol-TEVA. If patient suffers from an unexpected skin reaction (possibly in association with fever, swollen glands, joint pain, unusual blistering or bleeding, kidney problems or a sudden onset of fits), he/she should stop taking Allopurinol-TEVA and contact the doctor immediately.
Patient may occasionally feel sick, but this can usually be avoided by taking Allopurinol-TEVA after meals. Tell the doctor if this problem persists.
The following side effects have been reported occasionally: Fever, a general feeling of being unwell, headache, vertigo (a sensation that the surroundings are spinning either up and down or from side to side), nausea, vomiting, anaemia, uraemia (the presence of excess urea and other chemical waste products in the blood), swollen glands, loss of coordination, weakness or unsteadiness, unconsciousness and unresponsiveness, sleepiness, depression, loss of feeling in part of the body, 'pins and needles', taste disorders or inflammation in the mouth, a change in bowel habits or unusual bowel movements, impotence, sexual or infertility problems, liver problems (abnormal liver function tests, hepatitis), visual problems (including cataracts), ejaculation during sleep ('wet dream'), diabetes, boils, hair loss or discolouration, heart problems and high blood pressure, blood disorders which may be characterised by abnormal bruising, high levels of lipids (fats) in the blood, blood in the urine, swelling, and breast enlargement in men. There have been very rare reports of the presence of blood in vomit and a severe allergic reaction (anaphylactic shock).
If patient has these or any other effects, whilst taking Allopurinol-TEVA tell the doctor immediately.