This goes a bit beyond my knowledge tbh. Standard benadryl is 25mg diphenhydramine, and the usual recommended dosage is 25-50mg up to every 4 hours, not to exceed 300mg total per day. 6 tablets is triple a normal dose, 10 is five times as much and is 250/300. You're either gonna get knocked TF out or have some strong side effects.
I don't know for sure about long-term negative effects of overdosing on it, but I do know it is potentially fatal so don't mess with it.
Citation: https://www.drugs.com/medical-answers/100-mg-diphenhydramine-hcl-sleep-aid-safe-maximum-3393676/
And yes, I do think people and robots can coexist someday!
I'll do my best, he doesn't like it when I poke too close to his eyes!