Methylene Blue vs Semax
Well Studied vs Well Studied
monitor Mechanism-based · 51% Both Methylene Blue and Semax can raise blood pressure. Monitor BP regularly and consider adding cardiovascular support (cardarine, telmisartan, or similar).
Molecular Data
Methylene Blue Semax
Weight 319.85 Da 813.93 Da
Half-life ~5-6 hours 0.5-2 hours
Chain — 7 amino acids
Type Phenothiazine dye (C16H18ClN3S) ACTH(4-10) synthetic analog
Key Benefits
Methylene Blue
01 Enhances mitochondrial respiration and ATP production by acting as an alternative electron carrier
02 Reduces mitochondrial reactive oxygen species generation
03 Supports memory consolidation and cognitive performance at low doses
04 Neuroprotective effects demonstrated in models of Alzheimer's, Parkinson's, and traumatic brain injury
05 Improves mitochondrial function in aging cells and tissues
06 FDA-approved treatment for acquired methemoglobinemia
07 Anti-inflammatory and antimicrobial properties
Semax
01 Rapid brain delivery via intranasal route
02 Rapidly increases BDNF levels
03 Extensive clinical research in Russia
04 Easy self-administration
05 Modulates dopamine and serotonin systems
06 Neuroprotective effects
Dosing Protocols
Methylene Blue
0.5-2 mg/kg oral (low-dose nootropic) / Once daily
Semax
300-600mcg per dose (up to 1000mcg for intensive use) / 1-2x daily (morning recommended for cognitive boost)
Research protocol 500-750mcg 1x daily
Intensive protocol 750-1000mcg 1-2x daily
Side Effects
Methylene Blue
Blue or blue-green discoloration of urine (expected and harmless)
Blue-green staining of the tongue and mouth with liquid formulations
Mild nausea or stomach discomfort, especially at higher doses
Blue discoloration of stool
Mild headache during initial use
Semax
Mild nasal discomfort (nasal route)
Possible nasal sensation upon administration
Contraindications
Concurrent use of SSRIs, SNRIs, or MAO inhibitors (serotonin syndrome risk)
Glucose-6-phosphate dehydrogenase (G6PD) deficiency (risk of severe hemolytic anemia)
Renal insufficiency (methylene blue is primarily renally excreted)
Known hypersensitivity to methylene blue or phenothiazine compounds
Pregnancy and breastfeeding (insufficient safety data)
Pregnancy or breastfeeding
Known peptide allergies
Do not exceed 4-week continuous use without medical supervision
Research Evidence
Methylene Blue Semax
Status Well Studied Well Studied
References 5 studies 5 studies
Latest 2017 2025
FDA Approved Yes No
This comparison is for educational and research purposes only. Consult a healthcare professional before use.