Fifteen antipsychotics are major or minor substrates of CYP2D6 including most options for BD treatment, with quetiapine (CYP3A4, CYP3A5) and ziprasidone (CYP1A2, CYP3A4) as notable exceptions (Eum et al. 2016). Here, CYP2D6 is linked to Behcet disease.