Phototoxicity to diuretics and antidiabetics in the cultured keratinocyte cell line HaCaT: evaluation by clonogenic assay and single cell gel electrophoresis Comet assay).

Background: Potential phototoxicity has been described for a number of drugs and chemical substances. Psoralens, chlorpromazines and fluoroquinolones have been described as inducing photomutagenicity and photocarcinogenicity in vitro and in vivo. We wanted to investigate oral antidiabetics and diuretics for potential phototoxicity and possible DNA damage in the HaCaT cell line.