The practical nurse (PN) is discharging a client who had an anaphylactic reaction following administration of ampicillin. Which instruction is most important for the PN to provide this client?

Choice A reason: Peak and trough levels are relevant for drugs like antibiotics, not meloxicam, a nonsteroidal anti-inflammatory drug (NSAID). Meloxicam’s efficacy is assessed clinically, not via blood levels, as it reduces inflammation and pain, making this choice irrelevant for costochondritis management.

Choice B reason: Reassessing pain 30 minutes after meloxicam administration evaluates its effectiveness, as this NSAID inhibits cyclooxygenase, reducing prostaglandin-mediated inflammation and pain in costochondritis. Timely reassessment ensures adequate pain relief, guiding further interventions for breathing discomfort, making this the appropriate intervention.

Choice C reason: Involuntary lip and tongue movements are associated with antipsychotics, not meloxicam. This NSAID does not cause neurological side effects like tardive dyskinesia. Monitoring for this is irrelevant, as meloxicam’s primary concerns are gastrointestinal or renal, not movement disorders.

Choice D reason: Strict intake and output monitoring is unnecessary for meloxicam, which primarily affects inflammation, not fluid balance. While long-term use may impact kidneys, pain reassessment is more immediate for costochondritis, making this choice less relevant than evaluating therapeutic pain relief.

Choice A reason: Ankle circumference monitors edema, which mannitol reduces by drawing fluid from tissues. However, this is secondary to urinary output, as mannitol’s primary action is diuresis, increasing urine production to reduce intracranial or intraocular pressure, making edema measurement less critical.

Choice B reason: Heart rate is relevant for overall monitoring but not the primary outcome for mannitol, which acts as an osmotic diuretic. Cardiovascular effects are secondary, and mannitol’s efficacy is better assessed by urine output, which directly reflects its diuretic mechanism.

Choice C reason: Dietary intake is unrelated to mannitol’s therapeutic effect. Mannitol pulls fluid into the bloodstream, increasing urine output, not influenced by diet. Monitoring intake may be relevant for other conditions, but it is not critical for assessing mannitol’s diuretic action.

Choice D reason: Urinary output is the most important outcome, as mannitol, an osmotic diuretic, increases urine production by drawing fluid into the renal tubules, reducing intracranial or intraocular pressure. Adequate output (e.g., >30 mL/hour) confirms efficacy, preventing fluid overload or renal complications.