SHEET /vs/armodafinil-vs-modafinil · COMPARISON
Armodafinil vs Modafinil: what is the difference?
How they differ
Armodafinil and modafinil share one formula, C15H15NO2S, and one weight, 273.4, because they are the same molecule. Modafinil is an even mix of two mirror-image forms, and armodafinil is the R form on its own. The R form is the one that lingers: it clears from the body more slowly than its partner, so armodafinil's effect runs later into the day. Both are prescription wakefulness medicines, sold as Provigil and Nuvigil, used for narcolepsy and shift work sleep disorder. The mirror image sits at the sulfur atom, which carries an oxygen and two different groups.
Side by side
| Armodafinil | Modafinil | |
|---|---|---|
| Formula | C15H15NO2S | C15H15NO2S |
| Molecular weight | 273.4 g/mol | 273.4 g/mol |
| Family | Stimulants | Stimulants |
| Everyday group | Prescription medicine | Prescription medicine |
| Functional groups | Aromatics, Amides | Aromatics, Amides |
| GHS signal wordThe supplier-filed hazard label, not a statement about ordinary use. | Danger | Warning |
| CAS number | 112111-43-0 | 68693-11-8 |
| PubChem CID | 9690109 | 4236 |
Structural similarity 1.00 of 1, computed as a Morgan fingerprint Tanimoto coefficient. It measures shape, not effect.
Common questions
- What is the difference between Armodafinil and Modafinil?
- Armodafinil and modafinil share one formula, C15H15NO2S, and one weight, 273.4, because they are the same molecule. Modafinil is an even mix of two mirror-image forms, and armodafinil is the R form on its own. The R form is the one that lingers: it clears from the body more slowly than its partner, so armodafinil's effect runs later into the day.
- Do Armodafinil and Modafinil have the same formula?
- Yes. Both are C15H15NO2S at 273.4 g/mol. They are isomers: the same atoms arranged differently, which is why they behave differently despite weighing the same.
Read the full records: Armodafinil and Modafinil.