So that they break in the right place.. :)
Because it will not reach ur stomach and metabolize well and it is very bitter to swallow
Because when you crush them you get too much medication at once....Instead of letting the pill dissolve into your system.
Because your intenstines will absorb the medicine in time according to the coating of the pill against average absorbtion rates of people. Chewing means all the medicine will be absorbed quicker instead of little by little.