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 agent without known psychostimulant or mood-elevating properties. Choice B reason: Albuterol can cause mild nervousness or tachycardia but rarely induces full manic episodes. Choice C reason: Famotidine is an H2 blocker and has no known association 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 vulnerability. The timeline and symptoms suggest steroid-induced mania.