I would think that at least some preliminary knowledge about Lap-Band would be given to PCPs. I can see where they wouldn't know the details, but they should at least know how it works. A lot of people are getting the band nowadays. The first step, at least for me, was talking to me PCP about it.
As for pharmacists, they very definitely need to know what medication a Lap-Band patient should be given. Just as they need to know about drug interactions, they need to know what will cause people problems (pain, vomiting, etc.). High dosages of NSAID could cause severe problems over time, and they should know that.