Dyslexia , dyspraxia , dysgraphia in children

My friend just send me an e-mail if I can help her friend to find a good doctor for her son(8 years old) illness. Doctor in Serbia told her that he's got dyslexia,dyspraxia at dysgraphia. He is on DEPAKINE CHRONO half in the morning ,one in the evening and FRISIUM one in the morning and 1/4 in the evening. She mention that child is changing mood and can be sometimes aggressive. Mother thinks that child doesn't have a good terapy and would like to take him to London and find good therapist. I'm not sure about that, first it will cost lots of money and its possible child wont be any better latter.
I will be more than grateful if you can give me any advice what should be best for her to do.

Thank you