Which of the following is a common side effect of INH?

Isoniazid (INH) is an antibiotic commonly used to treat tuberculosis, and it has a well-documented side effect profile. Among these, hepatotoxicity is a significant and common concern. This adverse effect can manifest as elevated liver enzymes or even liver damage, particularly in certain populations. For instance, older adults and those with preexisting liver conditions are at a higher risk.

Monitoring liver function tests is an essential part of managing patients on INH, as timely intervention can prevent severe liver injury. Hepatotoxicity usually presents within the first few months of treatment, leading to symptoms like jaundice, fatigue, and abdominal pain. The risk of hepatotoxicity underscores the importance of assessing liver health before initiating therapy and during treatment.

The other options listed, while they may represent important medical concerns, are not typical side effects associated with isoniazid therapy. Understanding the common side effects, like hepatotoxicity, is crucial for healthcare professionals to ensure patient safety and effective management of tuberculosis treatment.