I am taking aciphex-20 two times. can i take schiff digestive advantage probiotic also? please answer.

Yes but two AcipHex (rabeprazole) 20 mg a day is a lot: I think a better question would be why do you need this much abdominal medication. A large dose of the medication could impair your magnesium and give you more problems than you started with. Perhaps some lifestyle changes would be good. I suggest avoiding alcohol, nicotine, and caffeine as well as any specific food that upsets your stomach. If you are overweight consider substantial weight loss.