Comparison
Modafinil vs Sulbutiamine
Modafinil
A eugeroic — a wakefulness-promoting compound — originally developed for narcolepsy. The most-studied prescription cognitive enhancer outside of ADHD treatment. Produces 12–15 hour windows of sustained alertness without the euphoria, abuse potential, or cardiovascular load of amphetamines. Prescription-only in nearly every jurisdiction.
Sulbutiamine
Synthetic derivative of vitamin B1 (thiamine) developed in Japan in the 1960s. Lipophilic — crosses BBB. Used for fatigue and mild mood support.
| Field | Modafinil | Sulbutiamine |
|---|---|---|
| Category | stimulant | stimulant |
| Dose range | 100–200mg | 200–600mg |
| Half-life | 14h | 5h |
| Onset | 45min | 45min |
| Evidence | EVIDENCEA | EVIDENCEB |
| Safety | ●●●○○ | ●●●●○ |
| Legal (US) | USSchedule IV | USUnscheduled |
| PubMed refs | 3200 | 50 |
The comparison in plain English
Auto-generated from dataModafinil and Sulbutiamine are both in the stimulant category respectively. Modafinil A eugeroic — a wakefulness-promoting compound — originally developed for narcolepsy. Sulbutiamine Synthetic derivative of vitamin B1 (thiamine) developed in Japan in the 1960s.
Bottom line
Modafinil (evidence A, safety 3/5) has a weaker evidence base than Sulbutiamine (evidence B, safety 4/5). Sulbutiamine has the slightly cleaner safety profile. For users new to either, the higher-evidence option is the safer first try.
Choose Modafinil if
Modafinil is the better fit when your goal aligns with its mechanism (Inhibits dopamine reuptake via the dopamine transporter (DAT), increasing extracellular dopamine in the prefrontal cortex) and the dose range (100–200mg) suits your protocol. Half-life is 14h.
Choose Sulbutiamine if
Sulbutiamine is the better fit when your goal aligns with its mechanism (Two thiamine molecules linked by a disulfide bridge, producing a lipophilic compound that crosses the blood-brain barrier far more readily than thiamine itself) and the dose range (200–600mg) suits your protocol. Half-life is 5h.