Make sure that the pvc primer and cement are both listed by NSF ( National Safety Foundation )
You'd think by looking at the label of pvc cement that these organic compounds would not be safe - but if you cement fittings together and let them dry - you'll be okay.
I always glue, then let dry overnight if possible, and then I'll run tapwater through the fittings/piping prior to placing it in my tank.
Maybe paranoid.
Maybe just a precaution.
But it makes me feel better.
If you want to read up on this topic - do a Google.com search for the following;
Tons of info on the net.
NSF 14 or NSF 61