Autism and medicine

My son had quite a late asd dx as he has a complex medical history. its always been hard to get him to take his meds, but I worry more as he gets older (he's 15 now), is there any support out there for asd kids to get then to be more compliant or understanding of how important it is to take their meds? It could potentially be life threatening if he doesn't take his meds.  

Many one else have similar issues or concerns?