A client is to receive a medication at 9:00 A.M. To prevent a medication error by administering at the incorrect time, the nurse can administer the medication anytime between:

Choice A reason: Two-hour window (8:00-10:00) is too broad; most protocols allow 30 minutes before/after, as wider ranges risk altering drug pharmacokinetics significantly. Choice B reason: One-hour window (8:30-9:30) is common but exceeds some strict policies; it’s less precise, potentially affecting drugs with tight timing needs. Choice C reason: 8:30-9:00 is only before; it excludes post-9:00 flexibility, limiting administration to early dosing, which may not align with full protocol windows. Choice D reason: 8:45-9:15 (30 minutes either side) fits standard policy; it ensures therapeutic levels for most drugs, balancing efficacy with practical scheduling.