Summary
Benoxaprofen (BP), a non-steroidal antiphlogistic drug causing skin and nail photoreactions, has been evaluated for photoactivity using three experimental techniques. In vivo in the mouse, BP was phototoxic in doses of 25 mg/kg in combination with UV-A 54 J. The phototoxic potency could be confirmed in vitro with the Candida albicans test. In vitro, using photohemolysis, BP showed a dose-dependent activity causing 40% hemolysis at a concentration of about 25 μg/ml with UV-a. Also, small UV-B doses caused red cell lysis with a moderate BP concentration. Preirradiation experiments showed that UV-A, but not UV-B, photoproducts could account for some of the activity. The action spectrum of BP photoactivity lies mainly in the UV-A, but may also extend into UV-B. Compared with chlorpromazine in vivo and in vitro, and with doxycycline in vivo, BP showed intermediate phototoxic activity.
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Ljunggren, B., Bjellerup, M. & Möller, H. Experimental studies on the mechanism of benoxaprofen photoreactions. Arch Dermatol Res 275, 318–323 (1983). https://doi.org/10.1007/BF00417205
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DOI: https://doi.org/10.1007/BF00417205