Possesion of narcotic

i was in possesion of an antidepressant which wasn't mine. I have an interview. whats that about and what punishment could I be looking at. if i get the person whose scrip it was to write a statement will that help?PA juvinile

I am a law school graduate. What I offer is mere information, not to be construed as forming an attorney client relationship.

We need to get this a little more clearer. please repost with a little more detail and facts.

Thanks