A nurse is caring for a client who reports difficulty breathing during the administration of an intermittent IV bolus of nafcillin. After stopping the infusion and notifying the provider, the nurse should anticipate a prescription for which of the following medications?

A. "Do not take more than 200 milligrams of this medication within 24 hours." This statement is correct for oral sumatriptan, which has a maximum recommended dose of 200 mg per 24 hours. Clients can take one 50 mg or 100 mg dose initially, and if the headache persists, a second dose can be taken after at least 2 hours, provided the total daily dose does not exceed 200 mg.

B. "You can take a second dose of this medication at least 2 hours after the initial dose if the headache persists." A second dose of sumatriptan can be taken at least 2 hours after the first dose if the headache has not fully resolved. However, if the headache persists after the maximum daily dose (200 mg), the client should not take additional doses and should seek medical evaluation.

C. "You should discontinue this medication if pregnancy is planned or suspected." Sumatriptan is classified as Pregnancy Category C, meaning its effects on fetal development are not well studied. Clients who are pregnant or planning to conceive should consult their healthcare provider before using this medication.

D. "You might experience a rash on your skin while taking this medication." Skin rash is not a common side effect of sumatriptan. If a rash develops, it could indicate an allergic reaction, which should be reported to a provider. However, routine monitoring for rashes is not necessary when taking sumatriptan.

E. "You might experience a feeling of pressure in your chest after taking this medication." Chest tightness or pressure is a known side effect of sumatriptan due to its vasoconstrictive effects. This sensation is usually temporary and not dangerous, but if it becomes severe or persistent, the client should seek medical attention to rule out cardiovascular complications.

F. "This medication can cause you to feel tired." Fatigue, drowsiness, and dizziness are common side effects of sumatriptan. Clients should be cautious when driving or operating machinery until they know how the medication affects them.

G. "This medication should start to alleviate the headache within 1 hour." Sumatriptan typically begins to relieve migraine symptoms within 30 to 60 minutes when taken orally. If the headache does not improve after 2 hours, a second dose may be taken, but the total daily dose should not exceed 200 mg.

A. "My appetite is increased." Diphenhydramine is an antihistamine that primarily treats allergic reactions by blocking histamine receptors. While antihistamines can sometimes cause increased appetite as a side effect, this is not an indicator of effectiveness in treating an allergic reaction.

B. "I don't have a headache anymore." While diphenhydramine may help with headaches due to its sedative and antihistamine effects, headache relief is not the primary goal when treating an allergic reaction. The effectiveness of diphenhydramine in this scenario should be assessed based on improvements in allergic symptoms rather than headache relief.

C. "My voice is no longer hoarse." Hoarseness can be a sign of airway involvement due to allergic reaction-related swelling (laryngeal edema). Diphenhydramine reduces histamine-induced inflammation, which can help resolve airway symptoms. Improvement in hoarseness suggests reduced swelling and a lower risk of airway obstruction, making this the best indicator of effectiveness.

D. "I am feeling more alert." Diphenhydramine commonly causes drowsiness due to its sedative effects. Feeling more alert would be an unusual response to the medication and does not indicate improvement in the allergic reaction. The primary concern is symptom resolution, particularly respiratory symptoms, rather than changes in alertness.