Involuntary movement: Like other medications to control symptoms of schizophrenia, fluphenazine decanoate may cause rhythmic involuntary movements, known as tardive dyskinesia . Tardive dyskinesia is more likely to occur in women and seniors. These movements may involve only the tongue, face, mouth, or jaw, or they may include the extremities and trunk. Tardive dyskinesia is not reversible for some people. Report involuntary movements including sticking out the tongue, puckering mouth, or chewing movements to your doctor as soon as possible.