What is disulfiram’s mechanism and what are key safety considerations?

What is disulfiram’s mechanism and what are key safety considerations?

• A. Requires patient education
• B. Inhibits aldehyde dehydrogenase leading to unpleasant symptoms if alcohol is ingested; contraindicated in severe liver disease, peptic ulcers, or poor adherence
• C. It is safe in severe liver disease without caveats
• D. It is effective even if patient drinks regularly without side effects

Answer: (B)

Disulfiram works by inhibiting aldehyde dehydrogenase, so if alcohol is consumed, acetaldehyde rapidly accumulates and produces a distressing reaction—flushing, rapid heartbeat, dizziness, nausea, hypotension, and sometimes vomiting. This aversive effect is meant to deter drinking by creating a strong, unpleasant consequence if alcohol is used. Safety considerations center on liver health and adherence. It is contraindicated in severe liver disease and peptic ulcers because these conditions increase the risk of serious adverse effects and complications from the disulfiram-platelet or hepatic stress. Adherence is crucial: if the patient misses doses or continues to drink, the reaction may not be managed safely, and there is a real risk of hepatotoxicity or severe hypotension if alcohol is ingested. In addition, it’s important to avoid alcohol-containing products and to monitor liver function during therapy. While patient education is needed for proper use, the core safety points that align with the mechanism are the liver disease contraindication, peptic ulcers, and adherence issues.

Disulfiram works by inhibiting aldehyde dehydrogenase, so if alcohol is consumed, acetaldehyde rapidly accumulates and produces a distressing reaction—flushing, rapid heartbeat, dizziness, nausea, hypotension, and sometimes vomiting. This aversive effect is meant to deter drinking by creating a strong, unpleasant consequence if alcohol is used.

Safety considerations center on liver health and adherence. It is contraindicated in severe liver disease and peptic ulcers because these conditions increase the risk of serious adverse effects and complications from the disulfiram-platelet or hepatic stress. Adherence is crucial: if the patient misses doses or continues to drink, the reaction may not be managed safely, and there is a real risk of hepatotoxicity or severe hypotension if alcohol is ingested. In addition, it’s important to avoid alcohol-containing products and to monitor liver function during therapy. While patient education is needed for proper use, the core safety points that align with the mechanism are the liver disease contraindication, peptic ulcers, and adherence issues.