2 VSL capsules = 225 billion probiotic bacteria
1 OTC Sachet = 450 billion probiotic bacteria
1 DS Rx Sachet = 900 billion probiotic bacteria
I started with 1 OTC Scahet a day for a month (450 billion) and moved to 2 DS Rx Sachets (1800 billion) when my GI prescribed it for me. I never had a problem with gas or bloating; I guess that is a very individualized thing.
BTW...my GI was not familiar with VSL either when I first spoke to his nurse. As a result, the nurse set up a meeting with a VSL Rep for the GI's entire office staff to educate them about this medical food. He now prescribes it to patients on a regular basis. I think you have to remember, most of these GI's are inundated with patients and proceedures. Not to let them off the hook, but sometimes I think the people in this forum do more research than the practicing GI's who are putting in 12 - 16 hour days...but, then again, many people here seem to have the time. If your GI doesn't know about VSL, help educate him/her.