Comparison
PE 22-28 vs Semax
PE 22-28: rapid, heavy-hitting antidepressant action vs. Semax: clean, sustainable nootropic focus.
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PE 22-28
TREK-1 Potassium Channel Blocker
Nootropict½ Short plasma t½; functional CNS effect >24h
Semax
Melanocortin Neuropeptide
Nootropict½ Plasma ~5 min; CNS effect 20–24 hours
Effectiveness Profile
PE 22-28
Semax
At a Glance
| PE 22-28 | Semax | |
|---|---|---|
| Type | Nootropic | Nootropic |
| Legal status | Research | Research |
| Half-life | Short plasma t½; functional CNS effect >24h | Plasma ~5 min; CNS effect 20–24 hours |
| Preferred route | SubQ | Intranasal |
| Dose frequency | once-daily | twice-daily |
| Beginner dose | 125–250 mcg | 300–600 mcg |
| Intermediate dose | 250–400 mcg | 600–1200 mcg |
| Advanced dose | 400–600 mcg | 1200–2000 mcg |
| Cycle length | 2–6 wks | 2–4 wks |
| Bioavailability | — | 70% |
| Time to peak | — | 0.5h |
| Active duration | 24h | 22h |
| Storage | Lyophilized: frozen, stable >12 months. Reconstituted: 2–8°C, use within ~30 days | 2–8°C refrigerated; discard reconstituted solution after ~30 days |
| PCT required | No | No |
| Ancillaries required | No | No |
| Safe for women | Yes | Yes |
Verdict
PE 22-28 wins for: rapid-onset relief of anhedonia and pronounced mood deficits (notably post-cycle, during PCT, or after stimulant/SSRI use); maximum potency on serotonergic tone via TREK-1 blockade; fast BDNF and neurogenesis ramp.
Semax wins for: steady cognitive enhancement, focus, and neuroprotection with minimal side effects; longer-term use for mood and mental clarity; extremely clean tolerability profile; easy intranasal administration; versatility in stacking (NASA, Selank, modafinil).
Pick A or B?
Pick PE 22-28 if:
- The goal is building back motivation or mood after a harsh suppressive cycle, in PCT, or after stimulant/serotonergic withdrawal
- Rapid onset (within days) of mood lift or anti-anhedonia is essential
- There is a need for heavy-hitting serotonergic action, beyond what Semax or Selank offers
- Pairing with other nootropic/neuroplasticity agents to amplify adaptability and mood
- Short, targeted cycles are preferred over indefinite daily use
Pick Semax if:
- Consistent, sustainable enhancement of focus and attention, especially when stimulant-like crash is a concern
- Supporting mood and cognition during or after AAS cycles, but without the need for aggressive rescue from severe anhedonia
- Long-term cognitive maintenance and neuroprotection (stroke/neurotrauma support or age-related decline)
- Desire for extremely low side effect risk and negligible interaction profile
- Easy administration is a priority (intranasal spray only, minimal reconstitution complexity)
Where to Buy
This comparison is presented for informational and educational purposes only. The compounds described may be research chemicals, prescription-only, or regulated substances in your jurisdiction. Consult a qualified medical professional before using any compound. This is not medical advice.