Allopurinol Side Effects by Likelihood and Severity Hypersensitivity Drug Reaction; Increased Lymphocyte Cells In The Blood; Inflammation Of The Covering. Other drugs may affect allopurinol, including prescription and. Allopurinol oral tablet (Zyloprim) is an oral drug used to decrease uric acid levels. Learn about side effects, warnings, dosage, and more. Hypersensitivity ; nausea eide vomiting. Your doctor will advise you about the correct dose. This can help make sure you stay safe while you take this drug. Forms available from special-order manufacturers include: oral suspension, oral solution, mouthwash. Keep your mouth clean by brushing your teeth regularly. Zyloprim mg, orange, round. Frequency not reported : Hypercalcemiahypocalcemiahyperphosphatemia, hypokalemiahyperuricemia, electrolyte abnormality, hyperglycemia, hypernatremiametabolic acidosisglycosuria, hyperkalemialactic acidosiswater intoxication, hypomagnesemia [ Ref ]. Call your doctor right away at the first appearance of a skin vrug or allergic reaction eg, trouble allopkrinol or swallowing, swelling of your hands, face, or mouth. Call our helpline Although not all of these side effects may occur, if they do occur they may need medical attention. Always discuss possible side effects with a healthcare provider who knows your medical history. If you want to keep a copy of the advice you've been mirtazapine and bupropion, you can print it using the button at the top of the chat window. More frequently reported side effects include: acute gout attack. Zyloprim capsules allopurinol. Acute attacks of gout are usually treated dryg a high dose of a non-steroidal anti-inflammatory drug NSAIDsuch as: diclofenac sodium die-clo-fe-nac sow-dee-um diclofenac potassium die-clo-fe-nac po-tass-ee-um etoricoxib ee-torry-cox-ib indomethacin in-doe-meth-a-sin ketoprofen key-toe-pro-fen naproxen na-procks-en sulindac suh-lin-dak. This is a decision you and your doctor will make.