Swallowed Cajeput Oil: What to Do First

If someone has swallowed cajeput oil, call poison control at 1-800-222-1222 in the United States before doing anything else; the line is free, confidential and staffed around the clock. Swallowing is the one way of using this oil that we advise against outright, and the reason is not caution for its own sake: the published cases show that nobody can predict from the amount which swallowers will be fine and which will not.

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The first few minutes

  1. Take the bottle away and rinse the mouth. Water, then spit it out. Western Australia's health department lists mouth rinsing first in its essential oil guidance (Healthy WA).
  2. Do not make the person vomit. The same source says so, and with good reason: it advises holding back drinks until the poisons centre says it is safe, because fluids can raise the chance of vomiting and breathing liquid into the lungs.
  3. Call 1-800-222-1222 or use the online tool at poison.org. Whatever the operator tells you overrides anything in an article, including this one.
  4. Have the facts ready. Who swallowed it, their age and weight, roughly how much, when, and what was in the bottle. Ours is sold neat and undiluted, and the bottle label carries a lot number and dates, so read those out. If it was your own blend, give the percentage.
  5. Go to emergency care instead of waiting if the person is drowsy, hard to rouse, having a seizure, struggling to breathe or vomiting repeatedly. Never drive someone who is losing consciousness; call your local emergency number.

Why the amount does not settle anything

People understandably ask how much is too much. For cajeput there is no published threshold, and the reports on its close cousin eucalyptus oil, which is also dominated by 1,8-cineole, point in confusing directions. In a Queensland series of 42 children under 14 who swallowed eucalyptus oil, 33 had no symptoms at all, including all four children said to have swallowed more than 30 mL, and the authors found no link between the amount and the symptoms (Webb and Pitt, 1993). Western Australia's poisons centre, on the other hand, says as little as 2 mL of eucalyptus oil can cause significant poisoning in an infant.

The honest reading is that two kinds of evidence sit side by side: many swallowers do fine, and some become seriously unwell on small amounts. A person can be well after 30 mL and ill after a fraction of it, so the rule has to be "call", never "wait and see how much". These are eucalyptus data, so applying them to cajeput is an extrapolation, but cajeput's chemistry is similar enough that we treat the lesson the same way.

Keep watching, even if they seem fine

The Western Australian guidance notes that symptoms can start as quickly as 30 minutes after swallowing, and in some people are delayed by up to four hours. It lists drowsiness, slow or shallow breathing, seizures, persistent cough, gagging or choking, wheezing, nausea and vomiting as the things to watch for. So an apparently well child ten minutes in is not the end of the story, which is one more reason to let the poisons centre set the monitoring plan.

Why "a drop in water" advice does not hold up

Some web pages suggest taking essential oils by mouth in water or honey. No regulator has set a safe oral dose for cajeput. When France's food-safety agency ANSES reviewed Melaleuca-oil food supplements in 2020, it concluded that the 1,8-cineole data for niaouli and cajeput "are insufficient and do not enable a safe exposure dose to be defined", recommended banning oral use of these oils under 30 months of age and in children with a history of epilepsy or febrile seizures, and advised pregnant and breastfeeding women against them (ANSES, 2020).

It is often pointed out that cajeput is a permitted food flavouring, and that is true, but the scale is entirely different. A flavouring is dosed in milligrams across a whole food, while one drop of undiluted oil weighs roughly 45 mg by simple planning arithmetic (the batch certificate we publish gives a relative density of 0.906, and a drop is about a twentieth of a milliliter, though that varies by dropper). That is why our label says aromatic and cosmetic use only, why we say to avoid internal use, and why we do not sell cajeput as a supplement.

How it usually happens

Mostly with toddlers, and mostly through ordinary household routines. In a Victorian survey of 109 parents of children under five involved in suspected eucalyptus oil poisonings, 74% of the children got the oil from a home vaporiser unit, most often one placed at floor level (Day et al., 1997). The plan that matters most is therefore the quiet one made before any accident: keep the bottle capped and high up, keep diffuser reservoirs out of reach, and never decant oil into an unlabelled container. Our guide to storing cajeput oil covers the bottle itself, and the articles on children and pets cover the households where it matters most. If a pet is the one that drank it, call a veterinary poison line rather than the human one.

Put the number where you can find it

The calmest time to prepare is now. Save the poison control number in your phone, and write it on a card inside the cupboard where the bottle lives or on the fridge. If you have pets, add your veterinarian and the number of a veterinary poison line next to it. When something goes wrong, you will not want to be searching for it.

If it only touched skin or eyes

The Western Australian guidance says to rinse an eye under running water for 15 minutes and have persistent symptoms checked by a doctor, and to remove contaminated clothing and wash skin with soap and water, seeing a doctor if symptoms do not clear. For ordinary skin use, our piece on dilution and patch tests shows how to keep that from happening in the first place.

If you are here because another website told you to take cajeput by mouth: please don't. And if someone already has, call now and keep the bottle in your hand while you talk.

Cajeput Essential Oil bottle

Cajeput Essential Oil

Cajeput Essential Oil from our own shop, in sizes from 0.5 oz to bulk.

From $10.99

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Sources & Further Reading