Final answer:
Valbenazine may assist with the symptoms described in the question. It is used to treat tardive dyskinesia, a condition characterized by involuntary movements.
Step-by-step explanation:
The medication that may assist with the symptoms described in the question is Valbenazine. Valbenazine is an FDA-approved medication that is used to treat tardive dyskinesia, a condition characterized by repetitive and involuntary movements of the face, tongue, and other body parts. Tardive dyskinesia can be a side effect of long-term use of antipsychotic medications, such as haloperidol. Chewing movements, like what the patient is experiencing, can be one of the symptoms of tardive dyskinesia.