>>40692986 (OP)schizophrenia and Alzheimer's are linked to M1 muscarinic receptor dysfunction
schizophrenia patients often at higher risk for dementia later in life
anticholinergic drugs like diphenhydramine can mimic schizophrenia symptoms by blocking M1 receptors at high doses
tobacco stimulating acetylcholine can counteract these effects suggesting that cholinergic drugs such as nicotine or caffeine could mildly alleviate schizophrenia symptoms
M1 and M4 receptors are promising therapeutic targets for both disorders due to their roles in cognition and dopamine regulation
TL;DR: yes likely due to acetylcholine stimulation