Black hairy tongue: a spooky sign associated with penicillin therapy

• 1 VAMED Klinik Kipfenberg, Kipfenberg, Germany
• 2 Klinik und Poliklinik für Neurologie am Standort Marburg, Marburg, Germany
• 3 Universität Bayreuth, Bayreuth, Germany

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• 2. Ren J, Zheng Y, Du H, et al. Antibiotic‐induced black hairy tongue: two case reports and a review of the literature. J Intern Med Res 2020; 48: 300060520961279.
• 3. Hamad Y, Warren DK. Black hairy tongue. N Engl J Med 2018; 379: e16.