Black tongue is seen in abuse of: (A) Heroine, (B) Dhatura, (C) Smoking, (D) Cocaine
Answer is D. Ans. is 'd' i.e. cocaine The tongue and teeth of chronic cocaine users are black.Also importantMagnate's symptoms*: seen in chronic cocaine users. Consists of tactile hallucinations * as if small insects are creeping on the skin (cocaine bugs)* or grains of sand are lying under the skin.