Do you know anything about protease, present in the stomach? they can digest proteins...and can make them non functional. That is the reason why many protein treatments like hormones are not given orally. Though new approaches are still under investigations and many groups came with innovative ideas too.  

Hi Faez, just to check if I understood your question correctly: You would like to know if scorpion venom can produce toxic effects when introduced orally in a human?

The standard answer will be "NO" as venom has to be introduced to your bloodstream or lymphatic system to show any effects. Additionally most venoms are made up of proteins that are broken down as they reach the stomach (most of the time). However, if you do have cuts in your throat (even little ones) there is chance of envenomation.

Hope that helps.

Tim

It's a complete answer Timothy, thank you ;)