A nurse is educating a client who has a new prescription for digoxin. Which of the following statements should the nurse make?

A) "Discard expired medication down the toilet":
Incorrect. Flushing medications down the toilet can lead to contamination of water supplies and harm the environment. This method is not recommended except for certain medications that specifically instruct this disposal method.

B) "Pour expired medication tablets into a waste basket":
Incorrect. Disposing of medication in a waste basket can pose risks of accidental ingestion by children, pets, or wildlife, and it does not prevent the potential misuse of medications.

C) "Return expired medication to the pharmacist":
Correct. Returning expired medications to the pharmacist is the safest and most environmentally friendly option. Pharmacists can ensure the medications are disposed of properly according to local regulations, which may include methods like incineration or using drug take-back programs.

D) "Crush expired medication tablets and rinse them down the sink":
Incorrect. Similar to flushing down the toilet, rinsing crushed medications down the sink can lead to water contamination. This method is not environmentally safe.

A. Using two separate syringes to mix the insulin is unnecessary and increases the risk of dosing errors and contamination. When preparing a mixture of short-acting insulin and NPH insulin, it's important to maintain sterility and accuracy. Utilizing separate syringes for each insulin type helps ensure that the correct doses are drawn from each vial and reduces the risk of accidentally mixing up the insulins.
B. Ensuring the NPH insulin is drawn into the syringe first is essential to prevent contamination of the NPH vial with short-acting insulin, which could affect its onset and duration of action. NPH insulin has a cloudy appearance due to its suspension, while short-acting insulin is clear. Drawing the NPH insulin first helps avoid introducing any short-acting insulin into the NPH vial, which could alter the suspension's consistency and affect its therapeutic effects.

C. Administering the insulin within 20 minutes of preparation is not specifically related to the mixing process and depends on the specific type of insulin being used. The timing of insulin administration after preparation depends on the specific characteristics of the insulins being mixed. While some insulin mixtures may need to be administered promptly after preparation to maintain their efficacy, the timeframe can vary based on factors such as insulin stability and compatibility.
D. Injecting air into the vial before withdrawing the short-acting insulin prevents a vacuum from forming in the vial, making it easier to withdraw the correct dose. When withdrawing medication from a vial, especially one with a rubber stopper, injecting air into the vial first displaces the volume of liquid that will be withdrawn. This action prevents the formation of a vacuum inside the vial, which could impede the withdrawal process by creating resistance against the syringe plunger