One big, warm, tight, hug, handshake and howdy, moose-sized official type welcome. This site is amazing!

As far as advice, I would do my best to down play the pills. Even lie if you have to. "I have a lot of allergies". Or find a way not to take them near your co-workers. But always remember:

You are not alone.
You are one of us.
And we are here to help.