Why should duloxetine (Cymbalta) be avoided with alcohol use?

• A. Liver damage—check LFTs
• B. Kidney damage—check creatinine
• C. Increased risk of seizures
• D. Prolonged QT interval

Answer: (A)

The main concept here is the risk of liver injury when duloxetine is used with alcohol. Duloxetine is processed by the liver and can cause elevations in liver enzymes and, in some cases, hepatotoxicity. Alcohol is also hepatotoxic and can impair liver function. When combined, the potential for liver damage increases, so the safest approach is to avoid heavy alcohol use while taking duloxetine and to monitor liver function tests if there is any concern or pre‑existing liver disease. This is why liver damage with LFT monitoring is the best answer.

The other possibilities aren’t the primary concern with this interaction: duloxetine is not typically known for QT prolongation, and while antidepressants can affect seizure threshold in some cases, the strongest and most relevant interaction with alcohol relates to liver injury.