A dystonia leads to abnormal postures or muscle spasms of the head, neck, limbs, or torso.
Acute dystonia occurs in 95% of cases within the first 96 hours after beginning the use of antipsychotics or after significantly increasing the dosage (or after reduction of a drug used to treat the extrapyramidal symptoms).
Sometimes acute dystonia occurs during treatment with a depot antipsychotic, often within a few days of injection. That is because a new depot temporarily gives a higher blood level of the antipsychotic.
The dystonia can occur in all muscle groups but occurs mainly in the head and neck area. A dystonia of the neck, jaw clamping, mouth opening dystonia, grimacing, eye rolling, pinching of the eyes, swallowing problems and poorly articulated speaking due to a thick or bulging tongue. A tight feeling in the tongue or throat may indicate a mild form of acute dystonia. Sometimes only the hands or just a few fingers are affected. Acute dystonia can spread in which, for example, the jaw, neck, back muscles, and arms and / or legs are also affected. Acute dystonia can vary in severity throughout the day and sometimes be virtually absent for a short time. Acute dystonia often causes fear and / or pain and can cause suspicious reactions such as “I am being controlled” or “the doctor is also complicit.”