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Rendering the skin susceptible to damage by light. Used of certain medications and cosmetics.

pho′to·tox·ic′i·ty (-tŏk-sĭs′ĭ-tē) n.


(Pharmacology) damage, esp to the skin, as a result of exposure to light
References in periodicals archive ?
A standard testing panel would include: ocular irritation, skin irritation, Ames and Micronucleus tests, skin sensitization and phototoxicity (if relevant)
The system will scan and analyze samples of native cell cultures, cell cultures 3D structures (nanospheres, microspheres, spheroids, organoidu), fixed preparations and tissue sections in transmitted light with phase contrast and fluorescence using multicolored low phototoxicity.
He improved gradually within 15 days and this suggests that it is a case of sulfonylurea induced phototoxicity.
Those who received the herbal extract rather than the conventional psoralen had significantly less acute phototoxicity, with a lower grade of erythema and edema--a decrease that "should make PUVA considerably more tolerable and comfortable for patients.
The phototoxicity, in particular, is important because it compounds the irritative effects of coal tar creosote and presumably, therefore, increases its carcinogenicity (ATSDR 2002).
In safety studies involving 307 adult patients, no systemic absorption or phototoxicity occurred, and the allergic potential was only 1%.
One of the most important is the ability to avoid phototoxicity to cells.
The three alternative methods approved by the SCCNFP are the Rat Skin Transcutaneous Electrical Resistance Test, the EPISKIN Test and the 3T3 Neutral Red Uptake Phototoxicity Test.
Two-photon photolysis has inherently better resolution deep in tissues but needs much more efficient photolysis to permit brief exposures at low concentrations without phototoxicity.
Some of those ingredients have been recently implicated in phototoxicity and endocrine disrupting issues.
Neither trial reported phototoxicity or photosensitivity, and no female patients developed oral or vaginal candidiasis during treatment with anti-inflammatory-dose doxycycline, he emphasized.