Now they keep it behind the register at the pharmacy at my Costco, so you have to ask for it and pay separately.
I purchase Smithicone on Amazon and get the chewable. It's way cheaper for me since I use to get it at Dollar store but they don't carry it anymore. I think if you purchased them separately it may be cheaper. I paid $11.11 for 300 chewable. I hope this may help you out.
Simethicone is an anti forming agent that works on swallowed air, Beano works on digestive gas from fermenting foods, loperomide is a bowel slower and fibre is a bulking agent. All have their uses and they can be taken together as the effects stack, although some people don't get on some treatments so with testing then individually first