**Question:** Which is not true about Tardive Dyskinesia (TD):

A. TD is a long-term side effect of antipsychotic medications.
B. TD is a rare condition that occurs in less than 1% of patients.
C. TD is a reversible condition that resolves promptly when antipsychotic medications are stopped.
D. TD is a movement disorder characterized by involuntary muscle contractions.

**Correct Answer: C.**

**Core Concept:** Tardive Dyskinesia (TD) is a group of involuntary, repetitive, and often exaggerated movements that occur in individuals who have taken antipsychotic medications for an extended period. TD is a long-term side effect of antipsychotics like chlorpromazine, fluphenazine, and haloperidol, among others.

**Why the Correct Answer is Right:** TD is a well-known side effect of antipsychotic medications, particularly long-acting ones. In this case, the correct answer is option C, which states that TD is a reversible condition that resolves promptly when antipsychotic medications are stopped. In reality, TD is a chronic condition that may persist even after antipsychotic medications are discontinued, as it is caused by long-term neuronal damage in the basal ganglia.

**Why Each Wrong Option is Incorrect:**

A. This option is correct, as TD is a well-known side effect of antipsychotic medications, particularly long-acting ones.
B. While the incidence of TD is relatively low (less than 1% of patients), it is not accurate to state that TD is "rare."
D. This statement is correct, as TD is a movement disorder characterized by involuntary muscle contractions.

**Clinical Pearl:** It is essential for healthcare professionals, particularly psychiatrists, to be aware of TD as a potential complication of prolonged antipsychotic medication use. Monitoring patients' movement and reporting any abnormal movements to their treating physician can help prevent the development of TD and manage it effectively if it occurs.