GFR	Glomerular filtration rate (mL/min)
[P]50,PIN	Plasma concentration of an inhibitor of uric acid production resulting in half‐maximal fractional decrease in the production rate of uric acid (ng/mL)
R max	Maximum fractional decrease in the production rate of uric acid due to the inhibitor of uric acid production
[P]50,RIN	Plasma concentration of an inhibitor of uric acid reabsorption resulting in half‐maximal increase in the fractional excretion coefficient (ng/mL)
F max	Maximum increase in fractional excretion coefficient due to the inhibitor of uric acid reabsorption
CL I	Intestinal clearance of uric acid (L/h)
V UA	Volume of distribution of uric acid (L)
F E	Fractional excretion coefficient of uric acid in urine
F E,0	Fractional excretion coefficient of uric acid in urine without drug treatment
S UA	Amount of uric acid in serum (mg)
[S UA]	Concentration of uric acid in serum (mg/dL)
k P	Production rate of uric acid (mg/h)
k P,0	Production rate of uric acid without drug treatment (mg/h)
X UA	Excretion rate of uric acid in urine (mg/h)
CL UA	Total clearance of uric acid (L/h)
U UA	Amount of uric acid excreted in urine (mg)
[P]PIN	Plasma concentration of the inhibitor of uric acid production rate
[P]RIN	Plasma concentration of the inhibitor of uric acid reabsorption