Good evidence' that ADHD drugs might also treat Alzheimer's disease Dihexa (also known as PNB 0408) is an experimental small molecule derived from angiotensin IV. It was engineered to cross the bloodbrain barrier and has shown synaptogenic effects in preclinical models. The often quoted Dihexa Cerebrolysin and Alzheimer's (3 minute masterclass) Comment BRAIN for research They're extremely different Here's the biology Dihexa renovates Cerebrolysin creates, rebuilds and renovates Alzheimer's Dementia MS Parkinson's TBI and more Only Dihexa Peptide: Complete Guide to Synaptogenesis (2026)