Depends on stage
Different doses are being used according to whether it is early, slow-growing, or more advanced, or metastatic.
No optimal dose has been established. Doses of 10-50 mg are being tried, but patients are advised to discuss using melatonin
with their doc/oncologist before trying it. Avoiding bright light at night is important to prevent lowering melatonin levels; use night lights/red beam flashlight.