The present invention is directed to a pharmaceutical composition comprising an Nrf2 inhbitor. Likewise, the present invention is directed to a pharmaceutical composition for use in the treatment of ASD in a patient, comprising: determining whether the patient suffers from ASD subtype 1 and administering a therapeutically effective amount of an Nrf-inhibitor if the patients suffers from ASD subtype 1, wherein determining whether the patient suffers from ASD subtype 1 comprises administering the patient an Nrf2-activator and identifying the patient as suffering from ASD subtype 1 if he shows a negative response.