<prompt> Drug that may induce nail pigmentation - melanonychia:RetinoidsCarbamazepineTetracyclinesZidovudine  <response>: Anthracyclines, taxanes, fluorouracil, psoralens, and zidovudine may induce nail pigmentation through melanocyte stimulation in nail matrix resulting in melanonychia. It appears to be reversible and dose-dependent and appears 3-8 weeks after drug intake. 