Final answer:
Hypercalcemia, characterized by high levels of calcium, can cause constipation. The underactive nervous system leads to symptoms such as lethargy, sluggish reflexes, constipation, loss of appetite, confusion, and coma.
Step-by-step explanation:
Hypercalcemia, which is characterized by abnormally high levels of calcium, can cause constipation in clients. In this condition, the nervous system becomes underactive, leading to symptoms such as lethargy, sluggish reflexes, constipation, and loss of appetite. Hypercalcemia can also result in confusion and, in severe cases, coma.