Which lifestyle modification should be advised for a patient taking isoniazid (INH) to limit hepatic damage?

Which lifestyle modification should be advised for a patient taking isoniazid (INH) to limit hepatic damage?

• A. Increase physical activity
• B. Avoid alcohol
• C. Take with an antacid
• D. Monitor urine color

Answer: (B)

Avoiding alcohol is advised because alcohol use increases the risk of liver injury when taking isoniazid. Isoniazid is processed in the liver, and alcohol can boost the liver’s enzyme activity, leading to higher formation of toxic metabolites and added hepatic stress. By not drinking (or limiting alcohol), the liver is less burdened, reducing the likelihood of hepatotoxicity from isoniazid. Other suggested actions won’t reliably reduce this risk: increasing physical activity doesn’t directly protect the liver from isoniazid-related damage; taking the drug with an antacid isn’t a protective measure and could affect absorption; monitoring urine color doesn’t prevent injury and isn’t a preventive lifestyle change. If alcohol avoidance is followed and any signs of liver trouble appear (such as jaundice, dark urine, or fatigue), prompt medical evaluation is important.

Avoiding alcohol is advised because alcohol use increases the risk of liver injury when taking isoniazid. Isoniazid is processed in the liver, and alcohol can boost the liver’s enzyme activity, leading to higher formation of toxic metabolites and added hepatic stress. By not drinking (or limiting alcohol), the liver is less burdened, reducing the likelihood of hepatotoxicity from isoniazid.

Other suggested actions won’t reliably reduce this risk: increasing physical activity doesn’t directly protect the liver from isoniazid-related damage; taking the drug with an antacid isn’t a protective measure and could affect absorption; monitoring urine color doesn’t prevent injury and isn’t a preventive lifestyle change. If alcohol avoidance is followed and any signs of liver trouble appear (such as jaundice, dark urine, or fatigue), prompt medical evaluation is important.