Tardive dyskinesia is a severe side effect of medications.
It is characterized by involuntary movements of the trunk, limbs, facial muscles, and mouth including sticking the tongue out, licking the lips, chewing and eye blinking. Some drugs have been known to cause the condition tardive dyskinesia, where the person has continual restless movements. They may not stop for weeks or months after the use of the drug has been discontinued. If this occurs as the side effect of this drug it may be permanent even after the therapy is stopped. Also some social implications occur, as the individual becomes self-conscious of the movements.