It would be worth it to go see his Dr to discuss this. Yr son knows his body best and sometimes meds don't feel right. It's.really.unfortunate that his.dad is.trying to say what is.best for his.body. at 11 years old you are very aware of how meds affect yr body. I'm so sorry yr going thru this. I would get into see his Dr for yr self to discuss this let us know how things are going. Hugs

Sent from my SGH-M919 using Tapatalk