What can I do to treat adult chronic leukemia?

See doctor. Leukemia is not some thing you can treat yourself for. See your doctor.
Depends on type. Treatment will depend on type of chronic leukemia--cml vs cll. For cll, the treatment will be indicated only if symptomatic or there is indication to treat. Asymptomatic will be put on observation only. CML is associated with a bcr-abl fusion gene abnormality. Treatment is a pill - which is a tyrosine kinase inhibitor that specifically targeted to the abnormal bcr-abl fusion gene.