Yaba and its effects

Hey all...

First of all... I am not a drug user.  Nope... not even aspirin or
tylenol or anything.  Anyways... I was at a dance/social at a
convention and I was offered some Yaba.  Of course I did not accept it
right then because I have never heard of it.  So I came back and did a
little internet research on it.  Interesting history.  So its kinda
like Ecstasy?  What would be the average negative effects that it
would have on me if I decided to take it?  I know it could range from
nothing to death... LOL!  What if it is only taken every month or so.
I heard it can be very addictive.  Thoughts?  Recommended useage?

Thanks,
John