Which types of insulin can be mixed when preparing a client's insulin regimen?

The ability to mix different types of insulin depends on their categories and how they work. Regular insulin, which is a short-acting insulin, can be mixed with NPH insulin, which is intermediate-acting. This combination allows for a more flexible management of blood sugar levels throughout the day, providing a quick onset of action from the regular insulin while using the NPH for more prolonged control.

Insulin aspart is a rapid-acting insulin and is generally not mixed with other insulins in the same syringe due to stability concerns and the risk of altering the pharmacokinetics of the insulins. Lispro is also a rapid-acting insulin and should not be mixed with NPH or other insulins due to similar issues.

Therefore, the correct answer indicates that Regular Insulin and NPH are suitable for mixing, offering a practical approach in insulin therapy management. It's important to follow guidelines when mixing insulins to ensure safety and effectiveness in the patient’s treatment plan.