Could already be experiencing side effects from dexamethasone:
Aggression agitation anxiety blurred vision decrease in the amount of urine dizziness fast, slow, pounding, or irregular heartbeat or pulse headache irritability mental depression mood changes nervousness noisy, rattling breathing numbness or tingling in the arms or legs pounding in the ears swelling of the fingers, hands, feet, or lower legs trouble thinking, speaking, or walking troubled breathing at rest weight gain
Without first hand knowledge, how do you assume POTUS is S/C?
If he was S/C, he wouldn't be working in an office, or in an SUV doing drive-by photo-ops. Also, they wouldn't be talking about him going home possibly today.
BREAKING: Pres. Trump arrives back at the White House, and removes his mask, following several nights at Walter Reed Medical Center. The president left Walter Reed this evening despite not having completed his full COVID-19 treatment. https://t.co/XCER5YMh2epic.twitter.com/rTfKo35d4G