Sorry to hear about the illness from the antibiotics, @marksmom. Sounds miserable.

Yes, I agree with you about medication differences among individual people. I've found this past year in my personal experience that medications do not all work the same on different bodies with different reactions to drugs. A medication that made me really quite sick (semaglutide - Wegovy) had zero side effects when my husband also took it.

You mentioned your GI doctor was impressed with your findings, marksmom. What did the doctor say about your reactions to antibiotics for your SIBO? What did he or she say about your findings thus far?