Dihexa
Also known as: N-hexanoic-Tyr-Ile-(6) aminohexanoic amide, PNB-0408
Dihexa is an oligopeptide drug with remarkable cognitive enhancement properties. It is 7 orders of magnitude more potent than BDNF and shows promise for neurodegenerative diseases.
Research Status
Research compound - Phase 1 clinical trials
For research purposes only. Not approved for human use. Not medical advice.
Research Areas
Side Effects
May occur early in treatment or with dose escalation. Usually resolves within hours. Ensure adequate hydration and consider taking at a time when you can rest if needed. If persistent, reduce dose and titrate more slowly.
Dihexa's cognitive stimulation may cause wakefulness if injected too late in the day. Inject in the morning (6-8 AM) to minimize this effect. Avoid injecting within 8 hours of bedtime.
May occur with higher doses or rapid dose escalation. Start with the lowest dose (0.25-0.5mg) and increase gradually over 2-4 weeks. Reduce dose if anxiety develops.
May occur immediately after injection. Sit or lie down for 5-10 minutes after injection if this occurs. Ensure adequate hydration and food intake.
Mild redness, itching, or swelling at the injection site. Rotate injection sites to prevent lipodystrophy and localized reactions. Use proper injection technique and sterile supplies.
Some users report increased or decreased appetite. Monitor food intake and adjust diet as needed. Ensure adequate nutrition to support neuronal health.
Some users report elevated mood or mild euphoria, particularly at higher doses. This is generally self-resolving but may warrant dose reduction if excessive.
May occur with high doses. Reduce dose and titrate more slowly. Ensure adequate sleep and minimize caffeine intake.
Uncommon but may occur with rapid dose escalation or on an empty stomach. Take with food or reduce dose. Ensure proper reconstitution and sterile technique.
Dosing Reference
| Parameter | Value |
|---|---|
| Dose range | 0.25-2 mg |
| Frequency | Daily or every other day |
| Timing | Morning |
| Route | Subcutaneous, Intranasal |
Start with lowest dose. Effects are cumulative. Extremely potent.
Research disclaimer
Figures drawn from published research literature and community logs. Not clinical recommendations. Consult a qualified professional. Research use only.
Reconstitution Guide
Do not use saline or bacteriostatic saline — use only bacteriostatic water for reconstitution
Do not shake the vial vigorously; gentle swirling prevents peptide degradation
Discard immediately if the solution appears cloudy, discolored, or contains visible particles
Use within 30 days of reconstitution when stored at 2–8°C
Do not freeze the reconstituted solution; freezing may denature the peptide
Use the PeptideVolt reconstitution calculator for your exact concentration
Molecular and Pharmacological Data
Dihexa is a synthetic hexapeptide that acts as a potent brain-derived neurotrophic factor (BDNF) mimetic, demonstrating approximately 7 orders of magnitude greater potency than native BDNF. It crosses the blood-brain barrier and binds to TrkB receptors on neurons, activating signaling cascades that promote neuronal survival, growth, and synaptic plasticity. This mechanism underlies its cognitive enhancement and neuroprotective properties, making it of interest for neurodegenerative disease research.
TrkB Receptor Activation
Dihexa binds to tropomyosin receptor kinase B (TrkB) receptors on neuronal cell surfaces, triggering autophosphorylation and downstream signaling cascades (PI3K/Akt, MAPK/ERK) that promote neuronal survival and differentiation
Synaptic Plasticity
TrkB activation enhances long-term potentiation (LTP) and long-term depression (LTD), cellular mechanisms underlying learning and memory formation
Neurogenesis
Dihexa promotes proliferation and differentiation of neural progenitor cells in the hippocampus and other brain regions, supporting cognitive function
Neuroprotection
TrkB signaling activates anti-apoptotic pathways and reduces oxidative stress, protecting neurons from degeneration and age-related decline
- Dihexa is approximately 7 orders of magnitude (10,000,000×) more potent than native BDNF in vitro
- It crosses the blood-brain barrier, allowing direct access to central nervous system targets
- Effects are cumulative; cognitive benefits may increase with continued use over weeks to months
- Research suggests efficacy in animal models of cognitive decline, Alzheimer's disease, and traumatic brain injury
- The peptide's extreme potency necessitates precise dosing and careful titration to avoid adverse effects
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