When preparing medications for delivery to an assigned patient, the nurse should check each medication for accuracy of drug and dose:

Choice A reason: Checking medications only once increases the likelihood of errors. Safe practice requires multiple verification steps. Choice B reason: While better than a single check, verifying only twice may still miss potential discrepancies in drug or dosage accuracy. Choice C reason: The three-check system (when retrieving, preparing, and administering medication) minimizes errors, ensuring patient safety through consistent validation at each step. Choice D reason: Excessive verification may delay administration, reducing practicality without significantly improving safety beyond three checks.