Pharmacokinetic properties of these two drugs highlight an interindividual pharmacokinetic considerable variability. The aim of this clinical research study is to determine the association between clinically significant side effects occurrence during the first year of treatment (serious adverse reaction and/or grade CTCAE ≥ 3 and/or leading a dosage concession) and plasma mean concentration of the steady state of ibrutinib or idelalisib performed at 1 month.