Allopurinol is an FDA1-Approved xanthine oxidase inhibitor that uses in the treatment
of gout, hyperuricemia and uremic kidney stones in patients with an increased level of uric acid
excretion. Xanthine oxidase acts by converting hypoxanthine and xanthine into uric acid, and
therefore its inhibition will result in decreased production of uric acid. The most common side effects
of this medication are as follows: maculopapular rashes, hives, itching, headache, dizziness,
abnormal hair loss, fever and hypersensitivity reaction. In this report, we are representing a case of
drug-induced meningitis in a senile man who ended up in ICU2 due to the remarkably reduced
state of consciousness.