s the case then be advised that
Concerta, like all stimulants, has the side effect of hair
loss(http://www.drugs.com/sfx/concerta-side-effects.html). It's likely that most doctors won't mention this, because it isn't a very prevalent side effect. In regards to a lack of concentration, it could be possible that the dosage of Concerta you're currently on isn't high enough, or Concerta simply isn't working out, but definitely talk to your doctor about this.