Good question, Ariadne. 
Normal is one 50 mcg spray. 150 mcg is a lot but not quite (sorry to be an overly technical weenie about this word) an OD. To me an OD would entail negative effects or a person being phero-invisible due to overload. I bet I could maybe go 250 mcg at some point. Imagining all the luuuuuurve that would generate is a little disconcerting actually.
XXOO Best,
Kitten