Photosensitizing drugs ie, fluoroquinolone, phenothiazines, sulfonamides, tetracycline, thiazide diuretics may enhance phototoxicity. Concomitant use w/ alcoholic products, or having strong drying effect, eg, astringent, medicated soap/shampoo, permanent curly soln, electrolysis, wax, hair clipper/trimmer, or others.