In vitro radioligand binding only: SDX showed no significant binding to human DAT, NET or SERT
“In a primary pharmacology in vitro radioligand receptor binding assay (Study No. AB54825); SDX at concentrations from 0.03 to 10 µM did not show significant binding to the human dopamine transporter (DAT), norepinephrine transporter (NET), or serotonin transporter”
✓ VerifiedFDA multi-discipline review, p. 47Source ↗
Why that model
SDX is a prodrug of the previously approved d-MPH
“KP415 is a combination of a new molecular entity (NME), serdexmethylphenidate (SDX), and a previously approved product, dexmethylphenidate (d-MPH). SDX is a prodrug of d-MPH.”
✓ VerifiedFDA multi-discipline review, p. 44Source ↗
Reviewer's view of the efficacy data
FDA: SDX has no pharmacological activity at monoamine transporters or 68 other targets and low oral bioavailability
“SDX has low oral bioavailability in humans (<3%), has no pharmacological activity at serotonin, dopamine, or norepinephrine transporters or 68 other molecular targets examined, and is not genotoxic in a battery of assays.”
✓ VerifiedFDA multi-discipline review, p. 61Source ↗