A 74-year-old client is diagnosed with COVID and is admitted to an inpatient hospital. Days later, he is more energetic than before his diagnosis. He exhibits flights of ideas, delusions of grandeur, and is ready to leave the hospital because he feels "so incredible." Which of the medications used in the treatment of COVID could have induced mania in this client?

Choice A reason: Remdesivir is an antiviral and is not commonly associated with mood disturbances such as mania. Choice B reason: Albuterol can cause mild nervousness or tremor but rarely induces full manic episodes. Choice C reason: Famotidine is an H2 receptor antagonist and is not associated with mania. Choice D reason: Dexamethasone is a corticosteroid that can induce psychiatric side effects including mania, agitation, and psychosis, particularly in older adults or those with underlying vulnerabilities.