**Core Concept**
HAART (Highly Active Antiretroviral Therapy) is a treatment regimen for HIV/AIDS, combining multiple antiretroviral drugs to suppress viral replication. Its adverse effects can be severe and multifaceted due to drug interactions, individual patient factors, and the body's response to the treatment.

**Why the Correct Answer is Right**
HAART therapy commonly causes lipid metabolism disorders, including hyperlipidemia, due to the inhibition of mitochondrial DNA polymerase gamma by certain antiretroviral drugs. This leads to impaired fatty acid oxidation and increased triglyceride levels. Additionally, HAART can cause lactic acidosis, a potentially life-threatening condition resulting from mitochondrial toxicity and impaired cellular respiration.

**Why Each Wrong Option is Incorrect**
**Option A:** Lipodystrophy is indeed a common adverse effect of HAART, characterized by abnormal fat distribution, including lipoatrophy and lipohypertrophy. This occurs due to the accumulation of toxic metabolites and mitochondrial dysfunction.

**Option B:** Nephrolithiasis is a known side effect of certain antiretroviral drugs, particularly tenofovir, which can cause renal tubular damage and increase the risk of kidney stones.

**Option C:** HAART-induced pancreatitis is a rare but serious adverse effect, often associated with the use of protease inhibitors. This occurs due to mitochondrial toxicity, impaired pancreatic enzyme function, and inflammation.

**Clinical Pearl / High-Yield Fact**
When managing patients on HAART, it is essential to monitor lipid profiles, renal function, and liver enzymes regularly. This helps prevent or detect adverse effects early, allowing for timely adjustments to the treatment regimen.

**Correct Answer:** D.