Cyanide sequestrant
- Binds cyanide directly → nontoxic cyanocobalamin, renally eliminated
- Turns skin and urine red
Drugs with this mechanism (1)
- Hydroxocobalamin — Vitamin B12 form that sequesters cyanide without inducing methemoglobinemia; turns fluids red.
Self-check
- What nontoxic product forms when cyanide is bound?
Cyanocobalamin. - What color change follows this antidote?
Red skin and urine.
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