**Core Concept**
Drug-induced hepatitis is characterized by inflammation of the liver caused by medications, leading to liver damage and dysfunction. The clinical presentation of drug-induced hepatitis can vary, but it often involves symptoms such as fever, rash, and joint pain.

**Why the Correct Answer is Right**
Neutrophilia, which is an increase in the number of neutrophils in the blood, is not typically associated with drug-induced hepatitis. In contrast, drug-induced hepatitis is often characterized by an increase in liver enzymes, such as alanine transaminase (ALT) and aspartate transaminase (AST), and a decrease in platelet count (thrombocytopenia). The liver damage and inflammation caused by drugs can lead to a decrease in neutrophil count, particularly in severe cases.

**Why Each Wrong Option is Incorrect**
**Option A:** Fever is a common symptom of drug-induced hepatitis, as the liver damage and inflammation can lead to a systemic inflammatory response.
**Option B:** Joint pain (arthritis) is also a characteristic feature of drug-induced hepatitis, particularly in cases involving medications such as minocycline or hydralazine.
**Option C:** Rash is another common symptom of drug-induced hepatitis, as the liver damage and inflammation can lead to a variety of skin manifestations, including urticaria, erythema, and even Stevens-Johnson syndrome.

**Clinical Pearl / High-Yield Fact**
In drug-induced hepatitis, the pattern of liver enzyme elevation can be helpful in distinguishing it from other forms of liver injury, such as viral hepatitis. For example, in drug-induced hepatitis, the AST:ALT ratio is often greater than 2:1, whereas in viral hepatitis, the ratio is typically less than 1:1.

**✓ Correct Answer: D. Neutrophilia**