I have taken two blood tests on nov 12 and march 13. my uric acid levels is up from 440 to 502 umol/l is it ok to take allopurinol? i never had attack

Yes, but why?: If you have never had gout, i would just try to change your diet to decrease your uric acid level. Every medication can cause side effects. If there is no reason to start a medication, try to adjust lifestyle to improve your health and avoid starting medications.

No: Unless you get repeated gout attacks, or a type of deforming gout called tophus ions gout or you get uric acid kidney stones, there is no need to take allopurinol.