I'm not sure where your FIL is being treated but there are many hospital settings where a patient would be treated by a general neurologist. In some cases, especially when complications from disease or medications arise, the neurologists are not as familiar with the nuances. Please ask the doctors if there are "movement disorder specialists" ... if not, ask them to please reach out to a specialist for consultation in his treatment.

These situations are tricky but it is critical to be proactive.

Best, Debi