hi,im a concerned parent with a teen that has been diagnosed with adhd,bipolar.hes been in and out of trouble for years ,and on and off meds.at the time hes off meds again ,hes now 18 and refusing to take meds due to meds in the past making him sleep all day or making him sick to the stomach,in what way can i persuade to him to take the meds to help himself focus and make healthy decisions?