title: [Circadian rhythm in the sensitivity of target systems to drugs: an underestimated phenomenon].
abstract: The chronokinetics of a drug corresponds to dosing time-dependent and predictable (rhythmic) changes in parameters used to characterize its pharmacokinetics e.g. Cmax, t(max), t1/2, AUC, etc.) The chronesthesy or chronopharmacodynamics corresponds to circadian changes in susceptibility of target biosystems to this drug. The target system can be an organ or a tissue (skin, bronchial tree, etc.) as well as a receptor, a membrane, an enzymatic process. Both theoretical and practical implications of chronesthesy have been underestimated and even ignored. It is usually assumed that the constant level over time of a drug in the plasma should result in constant effects. Much experimental evidence have shown that this hypothesis must be rejected.
authors.forename: A E
authors.initials: AE
authors.lastname: Reinberg
mesh_terms: D002940:Circadian Rhythm / Q000502:physiology*; D004334:Drug Administration Schedule; D006801:Humans; D009928:Organ Specificity; D010599:Pharmacokinetics
vernacular_title: Rythmes circadiens de la sensibilité des systèmes cibles aux médicaments: un phénomène sous-estimé.