It's a dramatic trope. I'm an american, born and raised as they say, and I've never seen that. It probably happens sometimes in places I'm not familiar with, but ... come on, it's absurd, anyone would be incapacitated by that many pills.
I was thinking about this when watching The Shape of Water, Michael Shannon's character is in his car, arms shaking, pouring the whole pill bottle on his face ...
It's a dramatic trope.