Die Erfindung betrifft ein Medikament enthaltend mindestens eine Verbindung der Formel (I)mit der Maßgabe, dass R1 für H oder CH3 und R2 für H oder COOH steht, oder deren Salze zur Inhibierung der durch Infrarotsrahlung induzieren Hautalterung.Medicament comprises substituted 3-amino-N-[2-(3H-imidazol-4-yl)-ethyl]-propionamide derivatives (I). Medicament comprises substituted 3-amino-N-[2-(3H-imidazol-4-yl)-ethyl]-propionamide derivatives of formula (I) or their salts. R1 : H or CH 3 and R2 : H or COOH. Independent claims are also included for: (1) a pharmaceutical formulation comprising (a) (I), (b) at least one UV protection factor, and (c) a carrier and (2) a cosmetic formulation comprising (i) (I), (ii) at least one UV protection factor, and (iii) a carrier. [Image] ACTIVITY : Dermatological. No biological data given. MECHANISM OF ACTION : None given.