Sugar is more lethal than a hand grenade (From the guy who wanted dabbing)

[Frank_Stein]

Maybe it could be tweaked to just massively reduce your max stamina, so you'd get tired after like one punch and get downed super easy in combat, maybe force walkspeed, but at least you'd still be able to do stuff.

That's how I feel about it, but barring that add some warning signs that you need to cut back or seek treatment before you get to comatose and lethal levels