I I’d leave out the Benadryl. Dementiaside effects.
Not from administering it on an acute basis.
I would only use it for the wet runny cough stage of suspected Covid. No more than a couple of days use. (Future Dementia? Or next week unconscious on a ventilator in ICU being plyed with remdisavir with Vaxed wife's approval? ("Why don't you believe The doctors and the Science???" ) )