Black tongue is seen in abuse of
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.
Heroine
Dhatura
Smoking
Cocaine
Forensic Toxicology - Concepts, Statutes, Evidence, and Techniques