Nope, not at all. The Admissions Dean is not going to run out of his/her office screaming the the Admin: "We have to invite this kid for an interview!!! They just got a new job at Major League Biotech!"
Yo bro, I see you commenting everywhere and you're clearly in a panic. I saw your original post, and I was confused why everyone was saying you would be DOA. You ultimately were only convicted of possession, several years ago. Just don't mention that you were a dealer and pled down the charges. A lot of applicants have IA or charges for alcohol or marijuana, it's not exactly an application killer. Unless you were caught with heroin or something.
That's exactly what it was...a major league bad substance.