1) use of diuretics

2) low fluid intake

3) rapid die off of white cells. Often after an infection, there can be a temp
elevation of uric acid because purines in the die off of the white cells may overload the clean up.

4) genetic inability in handling purines

5) high fructose intake

drugs:
Drugs that can increase uric acid measurements include alcohol, ascorbic acid, aspirin, caffeine, cisplatin, diazoxide, diuretics, epinephrine, ethambutol, levodopa, methyldopa, nicotinic acid, phenothiazines, and theophylline.

Drugs that can decrease uric acid measurements include allopurinol, high-dose aspirin, azathioprine, clofibrate, corticosteroids, estrogens, glucose infusion, guaifenesin, mannitol, probenecid, and warfarin.