Final answer:
The nurse should expect the prescription of administering antivenom medication to a client who sustained a rattlesnake bite to the lower leg.
Step-by-step explanation:
The nurse should expect the prescription of administering antivenom medication for a client who sustained a rattlesnake bite to the lower leg. Snake venom contains toxins that can cause various symptoms such as myokymia, defibrination syndrome, numbness, weakness, and vomiting. Administering antivenom medication, such as CroFab, is necessary to neutralize the venom and prevent further complications.