Relating to, characterized by, or causing phototoxicity.
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pho·to·tox·ic .fōt-ō-'täk-sik adj
1) rendering the skin susceptible to damage (as sunburn or blisters) upon exposure to light and esp. ultraviolet light <\phototoxic antibiotics> <a \phototoxic topical agent>
2) induced by a phototoxic substance <a \phototoxic response>
Medical dictionary. 2011.