Side effects of allopurinol 100 mg your doctor immediately if any of these rare but very serious side effects occur: numbness/tingling of arms/legs, easy bleeding/bruising, signs of infection (e. these effects are mild, they may go away within a few days or a couple of weeks. you're unable to continue taking allopurinol because of side-effects, you may be able to take another drug instead called febuxostat, which works in a similar way to allopurinol.
Metoprolol 100 mg side effects canada - call your doctor for medical advice about side effects. if side-effects occur, it may be possible to restart allopurinol using a special ‘desensitisation’ course, which involves beginning allopurinol at a very low dose and increasing the dosage gradually. this includes any possible side effects not listed in this leaflet.