Comparison
Fasoracetam vs Coluracetam
GABA-B upregulation vs. HACU amplification. Calm focus vs. sensory clarity.
Fasoracetam
mGluR Modulator / GABA-B Upregulator (Racetam)
Coluracetam
High-Affinity Choline Uptake Enhancer (Racetam)
Effectiveness Profile
At a Glance
| Fasoracetam | Coluracetam | |
|---|---|---|
| Type | Nootropic | Nootropic |
| Legal status | Research | Research |
| Half-life | 4–6.5 hours | 3–6 hours (PK); pharmacodynamic tail 24–72h after repeated dosing |
| Preferred route | Sublingual | Sublingual |
| Dose frequency | twice-daily | three-times-daily |
| Beginner dose | 10–20 mg | 3–10 mg |
| Intermediate dose | 20–50 mg | 10–30 mg |
| Advanced dose | 50–100 mg | 30–80 mg |
| Cycle length | 4–8 wks | 4–8 wks |
| Bioavailability | 88% | — |
| Time to peak | 1.5h | 1h |
| Active duration | 6h | 5h |
| Storage | Room temperature, sealed, away from light and humidity. Sublingual solutions in PG/ethanol are refrigerated. | Room temperature, dry, protected from light; refrigerate reconstituted sublingual solutions |
| PCT required | No | No |
| Ancillaries required | No | No |
| Safe for women | Yes | Yes |
Verdict
Fasoracetam wins for calming the adrenergic edge, modulating GABA-B for stimulant or phenibut recovery, and providing anti-anxiety effects without sedation. Its sweet spot is protocols where tranquility and soft focus are needed, notably for users balancing high-stim protocols or coming off GABAergic downregulation.
Coluracetam wins for enhancing sensory perception (color/visual vividness), rapid cholinergic engagement, and persistent cognitive "clarity" with a short-cycle effect. Its HACU mechanism delivers a marked perceptual upgrade and subtle mood lift, with carry-over benefits post-cycle. It's a favorite when demanding work or artistic focus is on the table, or where anhedonia is a problem on harsher protocols.
Pick A or B?
Pick Fasoracetam if:
- The protocol calls for smoothing out anxiety or jitter from stims, clen, or high-dose caffeine.
- There's a need to reset or upregulate GABA-B after chronic phenibut, baclofen, or GABAergic usage.
- Subtle anti-anhedonic or calming effects are desired during a heavy oral or SARM cycle.
- Tolerance to racetams is high and a different axis (glutamatergic) is wanted.
- A calm, non-sedating adjunct is preferred in a multi-racetam stack.
Pick Coluracetam if:
- The goal is pronounced visual/perceptual clarity or the "HD vision" effect, especially on short cycles.
- Anhedonia or cognitive dullness is creeping in during high-AAS or 19-nor cycles.
- Enhancement of working memory and focus is needed without the wired feeling of stims.
- Mood lift and subtle antidepressant effects are a focus, especially with comorbid anxiety/depression.
- A protocol already includes choline donors and synergy with cholinergic racetams is intended.
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