Oil of Oregano is a natural antibiotic and may boost the immune system. Echinacea is an immune system stimulant. I find Echinacea may help keep my immune system strong, but I don't think it helps destroy bacteria, virus and other microbes. Oil of Oregano has been shown to be a powerful antiviral, anti-fungal and antibiotic. I've taken Oil of Oregano and Echinacea together, as well as with my multi-vitamins and fish oils.

There is not much research on the effects of Oil of Oregano on birth control medication. Oil of Oregano has not been shown to affect the hormonal levels in the body so it's unlikely it will affect birth control drugs. If you have concerns, you may want to discuss this with you OB/GYN or family physician before using Oil of Oregano.