Side-by-side · Research reference
CerebrolysinvsHexarelin
Side-by-side comparison across mechanism, dosage, evidence, side effects, administration, and stack synergies. Citations on every claim where available.
APhase 3HUMAN-REVIEWED11/65 cited
BPhase 1HUMAN-REVIEWED19/45 cited
Cerebrolysin
Porcine Brain-Derived Peptide Mix · Phase 3
14–21 daysTreatment course
IV infusion · 100-250 mL saline · Daily
Hexarelin
Hexapeptide GHRP · Cardio-tropic
SQ · Multiple sites · 1–3×/day
01Mechanism of Action
Parameter
Cerebrolysin
Hexarelin
Primary target
Multiple neurotrophic pathways — mimics BDNF, NGF, CNTF receptor activation
Ghrelin receptor (GHS-R1a) + cardiac CD36Smith 1996Ghigo 1997
Pathway
Cerebrolysin peptides → BDNF/NGF/CNTF receptor binding → TrkB/TrkA/LIFR signaling → neuroprotection, neuroplasticity, synaptogenesis
GHS-R1a → Gαq → Ca²⁺ → GH release. CD36 engagement → direct cardio-tropic actionGhigo 1997
Downstream effect
Reduced apoptosis (Bax ↓, Bcl-2 ↑), suppressed TNF-α inflammation, elevated endogenous BDNF, enhanced synaptic plasticity and motor recovery
Strong GH pulse + IGF-1 elevation; cardio-protective effects in animal MI modelsGhigo 1997
Feedback intact?
Yes — exogenous peptides do not suppress endogenous neurotrophic factor synthesis
Yes initially; tachyphylaxis with chronic useGhigo 1997
Origin
Enzymatic breakdown of lipid-free porcine brain proteins → standardized low-MW peptide fraction (<10 kDa) + free amino acids
Synthetic hexapeptide His-D-2-Methyl-Trp-Ala-Trp-D-Phe-Lys-NH₂Smith 1996
Antibody development
Not reported in human trials; porcine origin theoretically immunogenic but no clinically significant allergic reactions documented
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02Dosage Protocols
Parameter
Cerebrolysin
Hexarelin
Standard dose (stroke)
30–50 mL / day IVStaszewski 2026Afridi 2026
Most trials use 30 mL in 100-250 mL saline over 30-60 min.
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Lower dose (dementia)
10–20 mL / day IV or IMKhatkova 2026
Chronic neurodegenerative conditions; intermittent courses.
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Duration
10–21 days (acute); intermittent courses (chronic)
Stroke trials typically 10-14 days; rehabilitation phases may use repeated 10-day courses.
4–8 weeks on / 4–8 weeks off (tachyphylaxis mitigation)
Timing (stroke)
Initiate within 12 hrs of symptom onset; up to 6 hrs optimal
Earlier initiation associated with better outcomes.
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Adjunct to thrombectomy
30-50 mL daily × 10-14 days, starting day of EVT
Propensity-matched data show 12-mo mRS 0-2 improved from 35% to 49%.
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Administration route
IV infusion (preferred) or IM injection
IV allows higher doses; IM used in outpatient/chronic settings.
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Frequency
—
1–2× per day max (tachyphylaxis with chronic 3× daily)
Lower / starter dose
—
50 mcg per dose
Reconstitution
—
Bacteriostatic water
Timing
—
Pre-sleep + fasted preferred
04Side Effects & Safety
Parameter
Cerebrolysin
Hexarelin
Injection site reaction
Mild pain, erythema (IM route)
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Infusion reaction
Rare: flushing, transient hypotension during rapid IV
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Agitation / Restlessness
Reported in <5% of patients; typically mild, self-limited
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Serious adverse events
No significant increase vs placebo (RR 1.02, 95% CI 0.87-1.20)
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Hemorrhagic transformation
Reduced incidence vs control (52% reduction in high-risk post-thrombolysis cohort)Kalinin 2025
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Mortality
No increase; meta-analysis RR 0.89 (0.68-1.18)
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Allergic reaction
Rare; porcine origin theoretically immunogenic but clinically insignificant
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Seizure risk
Not elevated; safe in epilepsy populations
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Hunger
—
Strong appetite increase via ghrelin agonism
IGF-1 elevation
—
Strong; monitor with chronic high-dose use
Cancer risk
—
Contraindicated in active malignancy (GH/IGF-1 axis)
Pregnancy / OB
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Avoid
Absolute Contraindications
Cerebrolysin
- ·Known hypersensitivity to porcine-derived products
- ·Active seizure disorder (relative — caution advised)
Hexarelin
- ·Active malignancy
- ·Pregnancy / breastfeeding
- ·Disrupted hypothalamic-pituitary axis
Relative Contraindications
Cerebrolysin
- ·Severe renal impairment (amino acid load — monitor)
- ·Pregnancy / lactation (insufficient safety data)
Hexarelin
- ·Untreated diabetes
- ·Severe hyperprolactinemia
05Administration Protocol
Parameter
Cerebrolysin
Hexarelin
1. Preparation (IV infusion)
Dilute prescribed dose (10-50 mL) in 100-250 mL 0.9% sodium chloride. Use immediately after preparation. Do not mix with other medications in same infusion bag.
Add 2 mL bacteriostatic water to 5 mg vial → 2.5 mg/mL = 250 mcg per 0.1 mL.
2. Infusion rate
Administer over 30-60 minutes. Slower infusion reduces risk of transient hypotension or flushing. Monitor vital signs during first administration.
SQ — abdomen or thigh. Rotate sites.
3. IM injection (alternative)
For 5-10 mL doses: inject deep IM into gluteal or deltoid muscle. Rotate sites if repeated daily. IM preferred for outpatient/chronic use.
Pre-sleep + fasted preferred. Cycle on/off to avoid tachyphylaxis.
4. Timing
Acute stroke: initiate within 6-12 hrs of symptom onset. Daily administration, preferably same time each day. Continue 10-21 days per protocol.
Lyophilised: room temp, light-protected. Reconstituted: refrigerate ≤30 days.
5. Storage
Store unopened ampoules at 15-25°C, protected from light. Do not freeze. Use diluted solution immediately; discard unused portion.
29–31G, 4–8 mm insulin syringe.
6. Co-administration
Compatible with standard stroke care (thrombolysis, thrombectomy, antiplatelet/anticoagulant therapy). Does not interfere with reperfusion therapies.
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06Stack Synergy
Cerebrolysin
+ Semax
ModerateCerebrolysin (multimodal neurotrophic peptide mix) and Semax (ACTH(4-10) analogue) operate through complementary neuroprotective pathways. Cerebrolysin elevates BDNF and suppresses apoptosis/inflammation via TrkB/TrkA signaling, while Semax enhances neuroplasticity through BDNF upregulation and dopaminergic modulation. Combined use in stroke or TBI may amplify anti-apoptotic effects and accelerate cognitive/motor recovery, though no direct RCT data exist for the combination.
- Cerebrolysin
- 30 mL IV daily × 10-14 days
- Semax
- 300-600 mcg intranasal BID × 10-14 days
- Timing
- Concurrent during acute recovery phase
- Primary benefit
- Enhanced neuroprotection, accelerated motor/cognitive recovery post-stroke or TBI
+ BPC-157
Multi-pathwayCerebrolysin provides CNS-specific neurotrophic support (BDNF, NGF pathways), while BPC-157 offers systemic tissue repair via angiogenesis (VEGF upregulation) and anti-inflammatory effects. In traumatic brain injury or stroke, Cerebrolysin addresses neuronal survival and synaptic plasticity, whereas BPC-157 may enhance vascular repair and blood-brain barrier integrity. The combination targets both neuronal and vascular compartments of brain injury, though clinical validation is lacking.
- Cerebrolysin
- 30-50 mL IV daily × 14 days
- BPC-157
- 250-500 mcg SQ daily × 14-28 days
- Timing
- Initiate both within 24-48 hrs of injury
- Primary benefit
- Dual neuronal + vascular repair in TBI or stroke; accelerated functional recovery
Hexarelin
+ CJC-1295 (no DAC)
StrongHexarelin (GHRP) + CJC-1295-no-DAC (GHRH analogue) is the higher-amplitude variant of the standard GHRH+GHRP stack. Hexarelin produces a stronger pulse than ipamorelin but with cortisol + prolactin signal — choose this stack for maximum GH amplitude when side-effect tolerance is acceptable. Cycle aggressively.
- Hexarelin
- 100 mcg SQ · pre-sleep
- CJC-1295 (no DAC)
- 100 mcg SQ · same injection
- Primary benefit
- Maximum GH pulse amplitude (with side-effect signal)