Final answer:
Involuntary muscle movements are a priority side effect when taking metoclopramide and must be reported to the healthcare provider immediately to prevent irreversible conditions like tardive dyskinesia.
Step-by-step explanation:
The nurse teaching a client about the side effects of metoclopramide should emphasize that involuntary muscle movements are a serious side effect and need to be reported to the healthcare provider immediately. These movements may be indicative of a condition called tardive dyskinesia, which can be irreversible. Other side effects like increased fatigue, onset of headaches, and difficulty with sleep while important, do not usually require immediate medical attention unless they are persistent or severe.
These involuntary movements occur because metoclopramide can affect the nervous system. Specifically, it may impact motor control by blocking dopamine receptors and altering neurotransmitter levels, which play a crucial role in coordinating muscle activity and movement.
Therefore, recognizing and promptly reporting signs of muscular problems associated with medications like metoclopramide can prevent long-term complications.