This is my second post to the site, but I think I understand what is happening.
I am 48 years old, IV treatment for 2 months 2 weeks of 6 month plan. I got some mental clearness after the first week. I had a set back and worried I had lost the battle. I could not write this message at that point. Since that time I have had times where I am clear headed and it can change quickly.
Two days back I got my mind back and have held it. I might be there, but I am not positive.
This might be help for him,
While my family Dr treated me for everything but Lymes, I got the diagnosis of adult ADD. Treatment was Adderall XR and many other medications. Over a two year period med's would stop working and need change. Had to visit a Physiologist for treatment and he finally admitted he did not think I had ADD. The medication tolerance was the give away, but it allowed me to go on with my life while the search went on.
My Dr wrote me the Adderall XR to help while I am in treatment. Once I reach the point I do not need it, it will be stopped.
Dr Gubb told me of young people with ADD and Lyme handling the conditions better than adults. Being a victim of the disease I understand the problem is Zombie.
Ask your Dr to try this, It might jump start him mind and life.
Give him an energy drink and see if he changes at all. It takes some time ot get med's to the best level. In that time you might want to give up, but once it is working you will see more focus and energy to live.
Best of luck.