High school senior no longer wants to take ADHD meds but is becoming painfully forgetful. I know I can't make him but is there anything useful I can do?

My 18 year old takes medication for seizures and ADHD. He's a high school senior, set to attend college this August, and stopped taking his medication this year. At first he did so secretly and then after my husband found out he admitted that he's tired of taking pills. He talked to his doctors about it. They warned him of what can happen if he doesn't take his medication but ultimately left it up to him. He hasn't been taking his meds and is becoming so forgetful. It's the smallest things. Yesterday I asked him to go fold the laundry. He agreed and when I checked an hour later I checked and the laundry was still in the laundry room unfolded. I looked for my son and he was outside playing with the dog. I asked about the laundry and he said he forgot. This is happening with school as well. He's forgetting assignments, what time he has to be at school for practices and games, etc. At first I was helping out but I won't be there to help him next year so I told him that he needs to download alarms to go off when he needs to do something because I am done being his alarm. This works most of the time but he doesn't check beforehand so today he came home, took at nap, and then woke up to his alarm for baseball practice. He got there on time but was raging because he had to rush and this was everyone's fault but his own.He refuses to consider going back on the meds. I'm really worried about college next year. We live in California and he'll be in Arizona so it's not a quick drive. His medical needs terrify me but him not taking his ADHD meds is becoming another issue. I don't want to pay for him to fail in college. I already told him that we aren't going to pay for his education if he isn't taking it seriously. Is there anything else I can do at this stage? via /r/Parenting https://ift.tt/2I0ox5w