Oregano oil is a common tool for SIBO support. I prefer capsules over liquid...

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

Oregano oil is a common tool for SIBO support. I prefer capsules over liquid for consistent carvacrol dosing and to avoid the burn. Most protocols suggest a two to four-week window. Here is what to check on the label for a quality extract.