Oregano Oil Continuous-Use Duration
There is no well-established “maximum duration” for continuous oral use of oregano oil because human safety data are limited and dosing varies across products. [1]
Maximum Practical Duration From Available Guidance
Oral oregano oil use should not exceed the labeled or recommended dose and should not be continued for more than “several weeks,” because taking it too long or at too-high doses increases the risk of adverse effects. [2]
Safety Considerations That Change the Duration Threshold
Oregano oil is contraindicated in pregnancy because it is described as an abortifacient. [1]
Adverse Effects Monitoring Trigger
Oregano oil should be discontinued if gastrointestinal symptoms or hypersensitivity reactions occur. [1], [2]