Symptoms of Oregano Oil Overdose

Even essential oils made from commonly ingested herbs can have harmful effects on your body. Such is the case with oregano oil. Oregano oil may have some health benefits but as aromatherapist Patricia Davis notes in her book, “Aromatherapy: An A-Z,” the harm tends to outweigh the benefit. You should not use oregano oil without first consulting a doctor or certified aromatherapist to see if it is appropriate for your condition. If you do use oregano oil, be aware of signs of an overdose.

Oregano oil can produce adverse reactions. (Image: anna1311/iStock/Getty Images)


If you develop a rash after using oregano oil topically or through other methods, it is a sign that your body is having an adverse reaction to the amount of oregano oil used. As points out, oregano is known to cause contact dermatitis and sometimes can also produce an anaphylactic reaction. The rash is a warning sign and you should discontinue use and seek medical attention.


Vomiting is another sign that you have overdosed on oregano oil. If for any reason after using the oil you experience vomiting, you should seek immediate medical attention. Davis advises never to use essential oils internally; this is especially true with oils that can produce severe reactions, such as oregano oil.

Tingling in Your Mouth

Although the first two overdose symptoms might seem obvious, other, less-noticeable symptoms are warning signs that you may have a toxic amount of oregano oil in your body. One example is an increased warmth or tingling feeling in your mouth. As mentioned you should not be taking oregano internally unless under the care of a doctor. If you experience this symptom, advise your physician right away.

Load comments

Copyright © 2019 Leaf Group Ltd. Use of this web site constitutes acceptance of the LIVESTRONG.COM Terms of Use , Privacy Policy and Copyright Policy . The material appearing on LIVESTRONG.COM is for educational use only. It should not be used as a substitute for professional medical advice, diagnosis or treatment. LIVESTRONG is a registered trademark of the LIVESTRONG Foundation. The LIVESTRONG Foundation and LIVESTRONG.COM do not endorse any of the products or services that are advertised on the web site. Moreover, we do not select every advertiser or advertisement that appears on the web site-many of the advertisements are served by third party advertising companies.