Concerta XL

[DebMG]

my daughter uses concerta xl twice a day she is 17 and not on the weekend, I think she's getting withdrawal symptoms , today she nearly passed out in town , does anyone have the same problem, plus her appitite had all but gone !!.

My son takes concerta XL he's 15. His appetite is very minimal whilst on meds but as with you he doesn't have them at weekends. His appetite increases then and I have noticed a degree of lethargy on and off them. But hes never passed out or been close. I would definitely focus on the food side of things.
He also has ASD and dyspraxia so I cant make him eat, I just save his fave meals for days he isn't on meds. He eats far more then. Good luck.