Please try Australian black licorice- I have chronic constipation, currently 12 days without a bowel movement- I’ve been putting off eating my licorice because 1-I have high blood pressure & 2- I’m diabetic. I was in the drug trial for linzess,but side effects weren’t good. I stopped going out for dinner with friends because like you, within 20 minutes of eating, I would have horrible gas. I have given some of my licorice to patients undergoing chemo who get constipated always with warning in case they have high blood pressure - each has had great success with it to relieve constipation.