to as black hairy tongue (lingua villosa nigra); however, hairy tongue may also appear brown, white, green, pink, or any of a variety of hues depending on the specific etiology and secondary factors (eg, use of colored mouthwashes, breath mints, candies). [2, 3] See the images below:Brown hairy tongue in a middle-aged woman who drinks coffee. Note how the condition is limited to the mid-dorsal part ] and linezolid, have been implicated. [11, 12, 13] Other medications that have been reported to induce black hairy tongue include doxycycline, penicillin lozenges, mepazine, oral tetracycline, olanzapine, and oral erythromycin. [14] Previous Next: EpidemiologyFrequencyThe prevalence of hairy tongue varies widely, from 8.3% in children and young adults to 57% in persons who are addicted to drugs