I was on lisinopril for about a year when I was first diagnosed with HBP. I never had the gas problems but it had caused me to have some kind of swelling in my tounge. It caused me to have horrible gag reflex. I was taken off lisinopril and put on diovan and it seems to work much better, but to this day i have poor gag reflex. I can't even brush my backteeth without wanting to gag.