Bupropion HCI SR interactions??

I read that sometimes Bupropion can sometimes interact adversly with stimulants, vitamins, and other drugs. I've been taking a weight loss suppliment called Anoretix and i wasn't sure if anyone could tell me what kind of adverse reactions i could have with combining the two drugs. I also take vitamins a, b complex, and c every day. I forgot to mention this to my doctor and didn't know if these might have reactions as well.

Finally, the perscription came with a warning about combining with alcohol. I was wondering what the effects are of combining the two. I am not a heavy drinker by any means, but do enjoy a few beers on occasion in social situations (dinner with friends and such). Is this low level of consumption ok? If i know i'm going to be drinking, should i skip my doses for the day?

I'll continue to search the internet for answers, but wanted to see if someone knew or maybe had experience with any of these things. Thanks!