Oseltamivir is an effective agent for both the treatment and prevention of influenza, and its use is increasing. The package insert indicates that delirium and delirium-like events have been reported with the use of oseltamivir during postmarketing surveillance. The reports of neuropsychiatric events associated with oseltamivir are mainly in younger patients. To our knowledge, this is the first reported case of oseltamivirassociated neuropsychiatric events occurring with oseltamivir prophylaxis in an older adult.
A 74-year-old male with a history of mild neurocognitive disorder was given oseltamivir prophylaxis in the setting of an influenza outbreak during his rehabilitation facility stay and developed newfound psychiatric symptoms after administration of oseltamivir for influenza prophylaxis because of institutional outbreak. The patient recovered completely after cessation of oseltamivir.
We hope that our case report highlights the importance of careful consideration when prescribing oseltamivir prophylaxis in older people with or without previous history of neurocognitive disorder.
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