Semax is a synthetic peptide derived from a fragment of adrenocorticotropic hormone (ACTH), developed for investigation into its potential neuroactive properties. Intranasal formulations, commonly referred to as Semax nasal spray, have been studied as a delivery method to support central nervous system exposure in research settings.

Preclinical studies suggest that Semax may influence pathways associated with neurotrophic signaling, including potential effects on brain-derived neurotrophic factor (BDNF) expression and neurotransmitter regulation. These mechanisms are believed to underlie its observed effects in experimental models examining cognitive function, stress adaptation, and neural resilience. Researchers have explored its potential role in supporting attention, memory processing, and adaptive neurological responses.

Beyond cognitive-focused research, Semax has also been investigated for its potential influence on neuroprotective signaling and inflammatory balance within neural tissues. Ongoing research continues to evaluate its impact on neuroplasticity, stress-response pathways, and overall central nervous system regulatory homeostasis.