Oregano oil with high carvacrol is a common SIBO protocol. I prefer capsules...

https://www.thistradinglife.com/health/best-oregano-oil-capsules-for-sibo-top-rated-supplements-for-gut-health-support

Oregano oil with high carvacrol is a common SIBO protocol. I prefer capsules over liquid to avoid esophageal irritation. Most see a shift within two to four weeks of steady, consistent use