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/ comparison

Modafinil
vs
Armodafinil

Side-by-side comparison of mechanism, research, dosing, side effects, and pricing.

nootropic

Modafinil

Wakefulness-promoting compound. Extensive research.

Cheapest
$47.04
200mg at Lab Sourced
See Modafinil →
nootropic

Armodafinil

R-enantiomer of modafinil. Longer half-life.

Cheapest
$55.37
150mg at One Day Compounds
See Armodafinil →
/ research scoring

Research base

Modafinil
Research Maturity★★★★★
Evidence Strength★★★★★

Extensive clinical research.

Armodafinil
Research Maturity★★★★★
Evidence Strength★★★★★

Multiple clinical trials.

/ mechanism

How they work

Modafinil

Dopamine reuptake inhibitor with multiple effects.

Armodafinil

Same as modafinil with longer duration.

/ research dosing

Protocols compared

Modafinil
Range: 100-200 mg/day
Frequency: Once daily, AM only
Route: Oral
AM dosing only — half-life 12-15 hours impairs sleep if taken later. 200mg/day standard for shift work, 100mg often sufficient for cognitive research.
Armodafinil
Range: 75-150 mg/day
Frequency: Once daily, AM
Route: Oral
R-enantiomer of modafinil. Longer effective duration. 150mg standard, 75mg often sufficient. AM dosing essential.
/ side effects & timeline

What to expect

Modafinil
Side effects

Common: headache, mild GI.

Timeline

Acute

Armodafinil
Side effects

Common: headache.

Timeline

Acute

/ pricing

Price comparison

Modafinil
Lowest price$47.04 (200mg)
Min $/mg$0.24/mg
Avg $/mg$0.60/mg
Max $/mg$1.10/mg
Armodafinil
Lowest price$55.37 (150mg)
Min $/mg$0.37/mg
Avg $/mg$0.59/mg
Max $/mg$0.86/mg
/ which to pick

The honest verdict

Pick Modafinil if: Standard standalone.

Pick Armodafinil if: Standalone use is standard.

Why not both? Some researchers run them together. Check our Interaction Matrix to see if these compounds synergize or work independently.

FOR RESEARCH USE ONLY. Both compounds are intended for laboratory research and not for human consumption.