How do I make sure I put in the right amount of calea in the pill?
C.Z. is VERY mild compared to just about any other drug you may have experienced. You can just crush the leaves and put them in capsules if you wish to try that method. Unless you are ingesting 20 capsules, you are not going to be getting 'too much.'
Toxic shock won't happen if you're not allergic. Just experiment with 1-2 capsules and work up from there. You should be fine.