my brother was diagnosed with sleep disorder 4 to 5 years before.we went to various doctors ,who prescribed all sorts of brain medicine, but of no use. Infact his IQ, reasoning, analysis, capacity has gone down substantially.he was a cleaver guy earlier.my question is can he recover from the mental retardation he has suffered due to the various allopathy medicine ,he has eaten.please help My brother age is 31 years.