I have brain impairment too. and there is one study that was done on brain impairment and Prostigmine. Prostigmine crosses the blood brain barrier. Patients were tested before and after taking Prostigmine and the majority showed marked improvment.

I started taking Prostigmine after reading that study and had real improvement in mental functioning. Too bad it fell victim to the Safe and Effective law. You can order it from Canadian pharmacies, but it's illegal in the US.

As always talk to your doctor to see if it's okay for you before you try a new drug.

But I think that study proves we are having cognitive problems. Can't remember the exact journal issue. I suppose I can go dig it up should anyone care to read it.