Dosing &
Monitoring

Monitoring Considerations

Monitor patients for hypertension, hypokalemia, and fluid retention at least once a month. Control hypertension and correct hypokalemia before and during treatment with ZYTIGA®.

Schedule for Required Monitoring for Patients on ZYTIGA®


Use caution and monitor for symptoms and signs of adrenocortical insufficiency, particularly if patients are withdrawn from prednisone, have prednisone dose reductions, or experience unusual stress.

Permanently discontinue ZYTIGA® for patients who develop a concurrent elevation of ALT greater than 3 x ULN and total bilirubin greater than 2 x ULN in the absence of biliary obstruction or other causes responsible for the concurrent elevation.

Promptly measure serum total bilirubin, AST, and ALT if clinical symptoms or signs suggestive of hepatotoxicity develop. Elevations of AST, ALT, or bilirubin from the patient’s baseline should prompt more frequent monitoring. If at any time AST or ALT rise above five  times the ULN, or the bilirubin rises above three  times the ULN, interrupt ZYTIGA® treatment and closely monitor liver function.

*Assess more frequently as required. 

Suggested schedule for patients with no or mild baseline hepatic impairment. For patients with baseline hepatic impairment or who develop hepatotoxicity during treatment, see When to Modify. Do not use ZYTIGA® in patients with baseline severe hepatic impairment (Child-Pugh Class C). Please see additional safety information below and full Prescribing Information for complete dosage and administration and warnings and precautions.