Comparison
Phenibut vs Tianeptine
Acute-event anxiolytic (Phenibut) vs rapid-onset mood elevator (Tianeptine): similar end points, very different risks and abuse profiles.
Phenibut
GABA-B Agonist Anxiolytic
Tianeptine
Atypical Antidepressant / μ-Opioid Agonist
Effectiveness Profile
At a Glance
| Phenibut | Tianeptine | |
|---|---|---|
| Type | Nootropic | Nootropic |
| Legal status | Grey-Market | Grey-Market |
| Half-life | ~5.3 hours | 2.5 hours (sodium salt); ~8–12 hours (sulfate XR) |
| Preferred route | Oral | Oral |
| Dose frequency | as-needed | as-needed |
| Beginner dose | 250–500 mg | 12.5–12.5 mg |
| Intermediate dose | 500–1000 mg | 12.5–25 mg |
| Advanced dose | 1000–1500 mg | 25–37.5 mg |
| Cycle length | — | 1–4 wks |
| Bioavailability | 63% | 99% |
| Time to peak | 3h | 1h |
| Active duration | 8h | 4h |
| Storage | Room temperature, sealed, away from moisture | Room temperature, dry, away from light |
| PCT required | No | No |
| Ancillaries required | No | No |
| Safe for women | Yes | Yes |
Verdict
Phenibut wins for: reliable anxiolysis with a smoother, less euphoric profile; cleaner next-day recovery when respected; superior for event-driven social anxiety or sleep resets; lower acute abuse potential if hard rules are followed.
Tianeptine wins for: fast-acting, warm mood lift closer to classical opioids; ultra-short half-life and rapid onset; effective for cutting-phase depression or post-cycle mood dip; less risk of cognitive impairment compared to benzos and GABAergics; easier to microdose for a subtle effect.
Both have high dependence liability if protocol is not respected — but tianeptine, as a μ-opioid, can spiral to multi-gram per day abuse much faster. Phenibut withdrawal is protracted GABA-B withdrawal; tianeptine withdrawal is archetypal opioid withdrawal. Safety comes down to community protocol discipline.
Pick A or B?
Pick Phenibut if:
- Acute-event anxiety is the target (public speaking, dates, travel)
- Need a clean, verbal, calm edge without sedation or euphoria
- Seeking a GABAergic social lubricant (alcohol alternative) with less cognitive fog
- Sleep reset is needed after a stimulant-heavy phase or cortisol spike
- A withdrawal profile similar to benzos (but not opioids) is more manageable
Pick Tianeptine if:
- Rapid-onset mood elevation is crucial (harsh cut, post-cycle blues)
- Opioid-spectrum anxiolysis fits better than the GABAergic profile
- A warm, pro-motivation effect is preferred over dampening anxiety
- Need for mood lift without typical SSRI sexual sides or blunting
- Short half-life and microdosing flexibility are desired (as long as total dose is locked down)
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