Side-by-side comparison of mechanisms, dosing, interactions, and stacking potential.
| Cerebrolysin | Semax | |
|---|---|---|
| Category | Peptides | Peptides |
| Standard Dose | Research indicates 10-30 mL daily via intravenous infusion for neurological indications. 5-10 mL for cognitive optimization. | Research indicates 200-600 mcg daily via intranasal administration (0.1% solution, 2-3 drops per nostril). |
| Timing | Morning administration preferred for cognitive effects. IV infusion over 15-20 minutes. | Morning and early afternoon dosing (avoid evening — may cause stimulation/insomnia). Intranasal preferred for rapid CNS delivery. |
| Cycle Duration | 10-20 day intensive cycles repeated every 3-6 months. Some protocols use ongoing 3x weekly maintenance. | 10-14 day cycles with equal rest periods. Some protocols use 3-5 day on / 2 day off patterns. |
| Evidence Level | moderate_human | moderate_human |
Cerebrolysin is a porcine brain-derived peptide preparation containing a standardized mixture of low-molecular-weight neuropeptides (<10 kDa) and free amino acids obtained through enzymatic proteolysis. It exerts multimodal neurotrophic effects by simultaneously upregulating VEGF, BDNF, IGF-1, and NGF while downregulating TNF-alpha. Cerebrolysin increases furin protease concentration, which promotes pro-NGF to mature NGF conversion. It activates TrkB receptor signaling (BDNF/TrkB/CREB pathway), inhibits neuronal apoptosis, reduces microglial activation, and promotes neurogenesis.
Research indicates 10-30 mL daily via intravenous infusion for neurological indications. 5-10 mL for cognitive optimization.
Morning administration preferred for cognitive effects. IV infusion over 15-20 minutes.
10-20 day intensive cycles repeated every 3-6 months. Some protocols use ongoing 3x weekly maintenance.
Semax (Met-Glu-His-Phe-Pro-Gly-Pro) is a synthetic heptapeptide analog of the ACTH(4-10) fragment that rapidly upregulates brain-derived neurotrophic factor (BDNF) and its signaling receptor TrkB in the hippocampus (1.4-fold BDNF protein increase, 3-fold exon III BDNF mRNA increase). It activates dopaminergic and serotonergic brain systems, enhances neurotrophin gene expression (BDNF, NGF), and modulates intracellular calcium dynamics in brain neurons. Semax lacks ACTH's corticotropic activity, acting purely as a nootropic/neuroprotective agent.
Research indicates 200-600 mcg daily via intranasal administration (0.1% solution, 2-3 drops per nostril).
Morning and early afternoon dosing (avoid evening — may cause stimulation/insomnia). Intranasal preferred for rapid CNS delivery.
10-14 day cycles with equal rest periods. Some protocols use 3-5 day on / 2 day off patterns.
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