NOEL svarer til niveauer 23 gange højere end niveauet fundet i patienter (7 ng/ ml sammenlignet med 0, 3 ng/ ml dvs. påvisningsgrænsen for emedastin).
Emedastine was found to increase the QT interval in dogs; the NOEL corresponds to levels 23-fold higher than those found in patients (7 ng/ ml as compared with 0.3 ng/ ml, i. e., the limit of detection for emedastine).