Modafinil vs armodafinil

Both compounds, side by side. What is actually different, and what is not.

The structural difference

Modafinil is a racemic mixture, equal parts R-modafinil and S-modafinil, the two enantiomers (mirror images) of the molecule. Armodafinil is purified R-modafinil only. R-modafinil has a longer half-life than S-modafinil; isolating it produces a longer-lasting compound at a lower per-mg dose.

Practical dosing equivalents

Standard modafinil dose is 200mg. The clinically equivalent armodafinil dose is 150mg, about a 75% milligram ratio. Both produce a comparable peak effect; armodafinil sustains it modestly longer.

Subjective differences

Users report variability. Modafinil is often described as a faster onset and a slightly more abrupt offset; armodafinil as a slightly later peak and a more gradual tail. A meaningful minority of users find armodafinil “cleaner”, less jitter, less jaw tension. A different minority finds modafinil more reliable. Individual variability dominates.

Which to start with

For most users new to either compound, modafinil 200mg is the default, more clinical history, more user reports, easier dose adjustment (half-tablet = 100mg). Try armodafinil if modafinil produces unwanted side effects, if you need a longer effect window, or if you simply want to compare.

What razumna offers

Modafinil 200mg today. Armodafinil follows on the next quarterly product release. The free samples on every order include five armodafinil 150mg tablets so you can compare without waiting.

Buy modafinil

Razumna ships modafinil in 150mg, 250mg, and 300mg strengths from private manufacturing partners under razumna’s QC. $124 with free tracked shipping; $99.20 with Bitcoin. First-dose guarantee. See product page.