It has many side effects, but I no longer have my pharmacy print-out of the
side effects listed. My doctor told me
Prevacid would not cause severe colitis, but it did. My GI doctor said it could, and I googled "Prevacid side effects" and found a Mayo Clinic article which stated that not only Prevacid, but Prilosec, and the other PPI drugs could in certain people cause severe colitis lasting for weeks.