Final answer:
The immunosuppressant drug most likely to promote sodium retention, hyperglycemia, and impaired absorption of calcium in liver transplant treatment is Cyclosporine.
Step-by-step explanation:
The immunosuppressant drug that is most likely to promote sodium retention, hyperglycemia, and impaired absorption of calcium is Cyclosporine.
Cyclosporine is commonly used in the treatment of liver transplants to suppress immune rejection. However, one of its side effects is that it can cause sodium retention, leading to fluid retention and increased blood pressure.
In addition, Cyclosporine can also cause hyperglycemia, which is high blood sugar levels, and impaired absorption of calcium, which can result in weakened bones and an increased risk of fractures.