My son is autistic and has just turned 18. He is finding it very difficult to accept that he is an adult and is freaking out about all the changes coming his way- leaving school, college, different respite location. His anxiety levels are very high and he is exhibiting more aggressive behaviours both at home and at school. He is relatively high functioning but is not able to discuss his worries or listen to reassurance. It has been suggested we put him on sertraline to lessen his anxiety but I am worried about possible side affects and how he will react to taking this. Can anyone help?