A man is arrested for possession of narcotics, the culprit is found to have black tongue. What is likely to have been the substance of abuse?

Question

Image below highlights jugular foramen. Which of the following structures do not pass through the marked structure “A”?

Answer 1

The question gives one physical clue, a black tongue, and asks which drug of abuse this points to.

Heroin: Chronic use shows track marks from injection, small pupils, and slowed breathing. There is no typical link to a black tongue.
Cocaine: When smoked as crack or freebase, the drug is heated in a small pipe that gets very hot. Repeated contact of the hot pipe stem with the lips and tongue causes burns that build up into a blackened, charred appearance, a sign seen in habitual smokers of this form of the drug.
Cannabis: Typical signs are red eyes, a dry mouth, and a raised appetite, not a black tongue.
Arsenic: This is a poison rather than a narcotic of abuse in this context, and its signs, such as nail line changes, skin pigment change, and garlic smelling breath, look nothing like a burned black tongue.

Only the smoking pattern of cocaine explains a black, burned looking tongue through repeated thermal injury from the hot pipe.

Let's summarize:

A black tongue in a drug case points to repeated thermal injury from smoking.
Crack or freebase cocaine smoked through a hot pipe is the classic cause of this sign.

The correct answer is cocaine.

Answer 2

The question gives one physical clue, a black tongue, and asks which drug of abuse this points to.

Heroin: Chronic use shows track marks from injection, small pupils, and slowed breathing. There is no typical link to a black tongue.
Cocaine: When smoked as crack or freebase, the drug is heated in a small pipe that gets very hot. Repeated contact of the hot pipe stem with the lips and tongue causes burns that build up into a blackened, charred appearance, a sign seen in habitual smokers of this form of the drug.
Cannabis: Typical signs are red eyes, a dry mouth, and a raised appetite, not a black tongue.
Arsenic: This is a poison rather than a narcotic of abuse in this context, and its signs, such as nail line changes, skin pigment change, and garlic smelling breath, look nothing like a burned black tongue.

Only the smoking pattern of cocaine explains a black, burned looking tongue through repeated thermal injury from the hot pipe.

Let's summarize:

A black tongue in a drug case points to repeated thermal injury from smoking.
Crack or freebase cocaine smoked through a hot pipe is the classic cause of this sign.

The correct answer is cocaine.

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