How bad is R134a for you?

[Elliott Potter]

It turns out that my A/C core is leaking, right in to the car.  That
explains the awful smell I've been smelling, and the oily fluorescent
green stuff that's been dribbling on to the garage floor.

The A/C was recharged so that they could do a leak test, and they left
it charged (thank goodness, so I had A/C during all this rain).  But now
I'm wondering; I know that inhaling R12 is supposed to be bad for you,
but what about R134a?  Or PAG oil fumes?  Just wondering how fast I need
to have this fixed...

Elliott
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Elliott