Tardive dyskinesia is a neurological movement disorder that is caused by the long-term use of a certain type of medications called neuroleptics. Neuroleptic drugs are usually prescribed for psychiatric conditions, although they may be used to treat gastrointestinal or neurological conditions in some cases.[1] Tardive dyskinesia is primarily characterized by repetitive involuntary movements of the jaw, lips and tongue such as grimacing; sticking out the tongue; and smacking, puckering and pursing the lips. Some affected people may also experience involuntary rapid, jerking movements (chorea) or slow, writhing movements (athetosis) of the arms and/or legs. It is unclear why some people who take neuroleptic medications develop these symptoms while others do not.[2] Treatment for this condition varies but may include stopping or minimizing the use of neuroleptic drugs and/or taking additional medications to to reduce the severity of the symptoms.
https://rarediseases.info.nih.gov/diseases/7732/disease