Reglan-Induced Tardive Dyskinesia: Symptoms, Causes & Management

Tardive dyskinesia (TD) is an involuntary movement disorder from long-term dopamine receptor antagonist (DRA) use. Reglan (metoclopramide) is a DRA used for GERD and diabetic gastroparesis.

Symptoms

• Repetitive, involuntary movements: grimacing, lip smacking, tongue protrusion, jaw movements.
• Chorea (dance-like movements) of limbs/trunk.
• Can affect speech, swallowing, breathing.

Mechanism

Prolonged DRA blockade upregulates dopamine receptors → hypersensitivity → dyskinetic movements when dopamine is present.

Risk Factors

• Elderly, female, longer duration/higher dose, diabetes, prior movement disorders.

Management

• Reduce or discontinue offending agent (if clinically feasible).
• Switch to alternative (e.g., domperidone for gastroparesis—lower CNS penetration).
• VMAT2 inhibitors (valbenazine, deutetrabenazine) FDA-approved for TD.
• Supportive care: Physical/speech therapy, counseling.

Monitoring

Regular AIMS (Abnormal Involuntary Movement Scale) exams for patients on DRAs. Balance benefits vs. TD risk.