Hi
I think you really need to thrash this out with your Doctors.
From your opening thread you are expressing some typical IBS symptoms.
I'm taking "IBS" medication for a totally different disease, dysautonomia, which happens to be incurable and untreatable at this time. Any medications that have been more of a problem than a help have been eliminated through tough consultation with my Gastro specialists. I have had to learn to advocate for my health, Dr's are not the holy grail of medicine my generation grew up believing. We now understand each other and work together for my benefit.
Cheers