An acute dystonic reaction is characterized by:

An acute dystonic reaction is characterized primarily by muscle spasms, which can affect the neck, face, and back. This reaction often occurs after the administration of antipsychotic medications, particularly in individuals who may be sensitive to the effects of these drugs. The spasms can be quite intense and may result in abnormal posturing or involuntary movements, making it a distinct and notable condition within the spectrum of drug-induced movement disorders.

The reaction typically manifests suddenly and can be very distressing for the patient. It is important for medical professionals to recognize these symptoms quickly so that they can intervene appropriately, often with medications such as anticholinergics to relieve the spasms. Understanding this aspect of the reaction is crucial for managing patients on antipsychotic therapy effectively.