I'm RX'ed to Klonopin and I have experimented with them (blowing them up my nose) you won't really get high at all off of it. The only cool thing was when I snorted it it made my nose feel really cold. But with klonopin you won't really get merked off of it. You can do 6 klonopin and you really won't feel to much of a difference, that is just how the pill works. I've seen people eat 20 of them and they only got a little high. Its not worth it in my opinion, you can deff find something better!
Afaik, clonazepam is very poorly soluble in water, so injecting klonopin pills is wasting your time. In fact, most benzos are not very soluble in water at all, with a few exceptions. However you can get clonazepam 1mg/ml injectable ampoules.