A patient who takes daily doses of aspirin is scheduled for surgery in one week. The nurse should advise the patient

Choice A rationale: While a decreased frequency of migraine headaches is a positive outcome, it does not directly indicate the immediate therapeutic effect of a sumatriptan (a serotonin receptor agonist). It may suggest a preventive effect over time.
Choice B rationale: Complete absence of migraine headaches is a positive outcome, but it is not always achievable. Immediate cessation of all headaches might not be realistic with every dose.
Choice C rationale: This is correct. Sumatriptan, a serotonin receptor agonist, is designed to terminate or relieve an ongoing migraine headache when administered during an attack. The patient reporting the termination of the migraine headache after drug administration suggests the desired therapeutic effect.
Choice D rationale: Increased nausea is not a desired therapeutic effect of sumatriptan. Sumatriptan is used to relieve the symptoms of migraines, including nausea, not exacerbate them.

Choice A rationale: Disorientation and hallucinations are not common side effects of fluoxetine. These symptoms may indicate other issues and should be reported to the healthcare provider.
Choice B rationale: Sexual side effects, including a potential decrease in interest in sex, are known side effects of fluoxetine. The statement suggesting enhanced interest is not accurate.
Choice C rationale: Fluoxetine, like other selective serotonin reuptake inhibitors (SSRIs), may take 3 to 4 weeks or even longer for the full therapeutic effect to be achieved.
Choice D rationale: Abruptly stopping fluoxetine is not recommended and can lead to withdrawal symptoms. The medication should be tapered under the guidance of a healthcare provider.