Drugs that should be avoided in patients with hepatic disease because they are highly protein bound and may have increased effects due to hypoproteinemia.

Drugs that should be avoided in patients with hepatic disease because they are highly protein bound and may have increased effects due to hypoproteinemia.

• A. Acepromazine
• B. Benzodiazepines
• C. Ketamine
• D. Midazolam

Answer: (A)

Acepromazine is the best answer because it is highly protein bound, meaning most of the drug circulates bound to plasma proteins under normal conditions. In hepatic disease, hypoalbuminemia reduces the amount of binding sites, so a larger fraction of acepromazine remains unbound and pharmacologically active. That increased free drug leads to stronger and longer-lasting effects, including profound sedation and cardiovascular depression. The liver’s impaired metabolism further slows clearance, magnifying the overall effect. While other benzodiazepines are also protein-bound, acepromazine’s very high binding makes it particularly sensitive to reduced albumin and hepatic function, making it the drug to avoid in hepatic disease. Ketamine, by contrast, has lower protein-binding and is less affected by hypoalbuminemia, so it’s less of a concern in this specific context.

Acepromazine is the best answer because it is highly protein bound, meaning most of the drug circulates bound to plasma proteins under normal conditions. In hepatic disease, hypoalbuminemia reduces the amount of binding sites, so a larger fraction of acepromazine remains unbound and pharmacologically active. That increased free drug leads to stronger and longer-lasting effects, including profound sedation and cardiovascular depression. The liver’s impaired metabolism further slows clearance, magnifying the overall effect. While other benzodiazepines are also protein-bound, acepromazine’s very high binding makes it particularly sensitive to reduced albumin and hepatic function, making it the drug to avoid in hepatic disease. Ketamine, by contrast, has lower protein-binding and is less affected by hypoalbuminemia, so it’s less of a concern in this specific context.