Semax

Synthetic ACTH(4-7) analog with C-terminal Pro-Gly-Pro extension — enhances BDNF/NGF expression, modulates dopamine/serotonin systems, neuroprotective via anti-inflammatory and anti-apoptotic pathways

Half-life: ~30 minutes (intranasal)

Cerebrolysin

Selank

Synthetic tuftsin analog with C-terminal Pro-Gly-Pro extension — modulates GABAergic system, stabilizes enkephalins, regulates IL-6 and monoamine metabolism, anxiolytic without sedation

Half-life: ~2-5 minutes (rapid CNS uptake and distribution)