i guess it would depend on his medication & diet there could be something that is helping the toxins to breakdown or maybe a chemical reaction could be happening causing brain chemicals to be more active, did he maybe drink more pryor to the improvement in urine. some foods can have a great effect on the functioning of our bodies due to the types or mineral content etc. It's hard to know without knowing all the paremeters which are probable that is impossible for anyone to answer. The only thing i can say is try praying to God because he has answered my prayers multiple times & i pray This same prayer for you & your family & especially your father in law!