What is he on?
My guess, as a base, pharmaceutical grade speed, also known as adderall.
Stronger doses as the old fart's system adjusts will be interesting.
I didn’t get a list, but it appears he’s on amphetamines, stimulant drugs that speed up messages between your brain and your body. His pupils are so dilated, his eyes look like black holes - another reason for sunglasses. He’s likely on drugs prescribed for ADHD (Adderall, Ritalin) & maybe others.