Atropine- biomedical science

Struggling with a research title of "Non-competitive antagonism of atropine". Does anyone have any information on it being a non-competitive antagonist? As most information online points to its competitiveness and there is little on non-competitiveness.

Thanks in advance!

I was always under the impression that it was a competitive, non-selective antagonist at the muscarinic M₁, M₂, M₃, M₄ and M₅ receptors (parasympatholytic action). I can't seem to find any evidence that suggests that is is a non-competitive antagonist at those receptors.

Yeah, thats exactly my thought. I've only ever studied atropine in relation to it being a competitive antagonist. There is almost zero information about it being non-competitive. But, I've been given a presentation title about it being non-competitive?! Think an email is in order.

Thanks for your help