Hello. I took Prilosec for about 9-10 months. Just trying to get off them now. Lately, my IBS-D has been worse. After reading about a recent study that showed that 50% of long-term PPI users had SIBO as a result of taking PPI's for so long, I'm starting to worry. Does anyone know if taking PPIs for 9-10 months is long enough cause SIBO?