General Safety

Aytz Chayim Aromatherapy
Tree of Life Aromatherapy
עץ חיים שׁמנים אתריים
Essential oil Guideline and Safety

Essential Oils are a safe substances when used properly

within certain guidelines.

However, many of the oils are potentially harmful if misused.  

Please be aware of the following precautionary information.

Very Toxic Oils

Aniseed, Mugwort, Pennyroyal, Wintergreen
Be extremely cautious when you must use these oils, using only small
amounts and storing them safely away from children.

Semi-Toxic Oils

Cassia, Birch, Cedarwood, Cinnamon, Clove, Fennel, Lemon, Thyme
All of these, plus Orange and Eucalyptus, can also become increasingly
toxic if used repeatedly over a period of time.

Some oils must be avoided during pregnancy or cases of epilepsy.
Some oils can be skin irritants or cause skin discoloration under certain

The oils which pertain to these categories are specified below,
and are also indicated by category number on the
60 Basic Botanicals Chart & Professional Essential Oils Chart

Pregnancy – Avoid

Basil, Clary Sage, Hyssop, Juniper-Berry, Marjoram, Myrrh,
Pennyroyal, Rosemary and large amounts of Peppermint
Any of them can prematurely induce labor. Also avoid the very toxic
and semi-toxic oils, to protect the fetus.

Epilepsy – Avoid

Fennel, Sage and large amounts of Rosemary or Hyssop
These could provoke an unwanted epileptic reaction IF a person has a
predisposition to this condition.

Be Aware of the Skin Irritants

All Citrus oils (except Bergamot), Black Pepper, Cinnamon Bark,
Citronella, Clove, Ginger, Lemongrass, Melissa, Nutmeg and large
amounts of Cinnamon Leaf or Peppermint

Exposure to direct Sunlight

Avoid direct sunlight after application of Bergamot. Otherwise, skin
discoloration may result due to increased photosensitivity.

Persons with Asthma

Use smaller amounts of any of the essential oils. The amounts can then
be increased gradually if there is no sign of an adverse reaction.

Never take essential internally very dangerous and is not considered safe by any medical

standards or by any qualified trained Certified  Aroma-therapists.



Persons with a Bleeding disorder
Research of Dr. Rivka Sari
(c) 1996-2006

This is a ongoing List of Essential oils, herbs and resins- Safety for Hemophilia and Bleeding disorders

 Space out medications at least 2-3 hours from using essential oils. If on a “blood thinner”, only use oils if your physicians are monitoring “clotting time” (PT/PTT/INR)

Essential Oils to avoid:
Angelica, Clove Bud, caraway, Cinnamon Leaf, Cinnamon Bark, Cassia, Bay Laurel, Ginger, Oregano, Cilantro, Tumeric, tarragon, cumin, Fennel,  Spike Lavender, Wintergreen, Fir, Pine, Peppermint, Cornmint, Willow (note willow is what asprin is made of), Damiana, Tea Tree black, Marigold, Chervil, Betel, Ravensara leaf, Nutmeg, Laurel Leaf, Helichrysum gymnocephalum, Yarrow, St. John’s Wort,
Spearmint Sweet Birch, Bitter Orange, Frankincense b.seratta, Frankincense b.caterri (added 12/5/18), Tangerine, Mandarin, Clary Sage, Marjoram, Basil, Thyme, Listea, Garlic, Lemongrass,
Lemon Myrtle, Sweet Orange, Pink Grapefruit, Red Grapefruit and any other essential oils from the Citrus family
Naturopath remedy to avoid is Arnica flower in any form like teething pills, gel, and macerated oil, salve etc. Thinning of blood can occur with Arnica because arnica works only with a person who clots normally

 Coumarin Known Blood Thinner

The following oils contain coumarins or other constituents that may interfere with blood thinners. However, if anyone is on blood thinners, any changes with any supplement or medication should be followed by their doctor.

Avoid angelica, birch, cinnamon, St. John’s Wort, clove, fir (balsam), Helichrysum gymnocephalum  and , Laurus nobilis, nutmeg, oregano, wintergreen, unless you are being monitored by your doctor on levels. In addition to list above.

Oils that can be used in moderation:
Hyssop, Rosemary, Bergamot, Spruce, Balsam, Black Pepper, Melissa, Neroli, and Lemon, White Grapefruit, Frankincense b. fereana, Frankincense b.sacra, Frankincense b.rivae, Roman Chamomile

(DO NOT USE Frankincense b.seratta or Frankincense b.caterri)

Essential Oils that might assist in reducing hemorrhages:
Rosewood, Labdanum, Myrrh, Cypress, Lavender,
Geranium, Rose, Sandalwood, Helichrysum helichrysum italicum, Lemon, Citron Etrog.

Essential Oils that might assist in contracting blood vessels:
Chamomile, Cypress, Rose, Helichrysum helichrysum italicum , Lemon, White Leafed Savory, and Tea Tree Melaleuca alternifolia

Essential Oils that might ease the stress:
Lavender, Melissa (diffusion only), Frankincense b.neglecta, Frankincense b.sacra ,
Labdanum, Neroli (diffusion only), Bergamot (diffusion only), Coriander, Cypress, Helichrysum helichrysum italicum, Chamomile,Geranium, Ravensara, Rose, Sandalwood, Valerian,
Spikenard, Basil, Patchouli, Floral oils, Tree oil

To ease nosebleeds:
Cypress, Lavender, Frankincense b.rivae or b.sacra, and Helichrysum helichrysum italicum.

Helichrysum all species should be avoided by anyone taking blood thinner medications such as Warfarin. It has been observed in some clients that their INR tests are affected which may be medication interactions.
Highly recommend this book available on Amazon.

Salicylates and warfarin

Picture from 2014

Some research has shown these herbs should be avoided too or use with extreme caution. If essential oil needs to be avoided then the herbs should be also.
Anise (synonym Aniseed) Pimpinella anisum
Anise (Star) Illicium verum, Basil (estragole CT) Ocimum basilicum
Basil (Holy) Ocimum tenuiflorum synonym Ocimum sanctum
Basil (Madagascan) Ocimum gratissimum
Basil (Pungent) Ocimum gratissimum synonym Ocimum viride
Bay (West Indian) Pimenta racemosa synonym Pimenta acris
Cassia Cinnamomum cassia synonym Cinnamomum aromaticum
Cinnamon (Bark) Cinnamomum verum synonym Cinnamomum zeylanicum
Cinnamon (Leaf) Cinnamomum verum synonym Cinnamomum zeylanicum
Clove (Bud) Syzygium aromaticum synonym Eugenia caryophyllata and Eugenia aromatica
Clove (Leaf) Syzygium aromaticum synonym Eugenia caryophyllata and Eugenia aromatica
Clove (Stem) Syzygium aromaticum synonym Eugenia caryophyllata and Eugenia aromatica

 Garlic clove Allium sativum, Ginger Zingiber officinale

GingerFennel (Bitter) Foeniculum vulgare subspecies Capillaceum

Frankincense b.seratta resin, Frankincense b.caterri resin
Lavandin Lavandula x intermedia synonym

Lavandula hybrida, synonym Lavandula hortensis
Marjoram (Wild, carvacrol CT) Origanum marjorana, synonyn

Marjorana hortensis synonyn Origanum dubium
Myrtle (Aniseed) Backhousia anisata
Oregano (Mexican) Lippia graveolens synonym

Lippia berlandieri synonym Lippia amentaceasynonym Lippia tomentosa

Tea Tree black melaleuca bracteata
Thyme (borneol CT) Thymus satureioides
Thyme (limonene CT) Thymus vulgaris synonym

Thymus serphyllum
Thyme (thymol CT and carvacrol CT) Thymus vulgaris synonym

Thymus serphyllum synonymThymus zygis
Thyme (Spike) Thymbra spicata

If you are taking the drug or any other prescription medication, it is crucial that you talk with your doctor about any herbal or nutritional supplement (including food powders, oils, teas, or juices), you are taking or are considering taking. Here are some of the herbs and supplements that may interact with warfarin.

  • Alfalfa – contains vitamin K
  • Alpha-linolenic acid (ALA) – e.g. flaxseed oil, pumpkin seed oil
  • Boswellia (Boswellia serrata)
  • Camellia sinensis – e.g. black tea, green tea
  • Chamomile (Matricaria chamomilla)
  • Cocoa
  • Coenzyme Q10
  • Cranberry
  • Danshen (Salvia miltiorrhiza) – may decrease platelet aggregation and increase the bleeding risk.
  • DHA (docosahexaenoic acid)/ EPA (eicosapentaenoic acid)
  • Dong quai (Angelica sinensis) – may inhibit platelet aggregation and increase the risk of bleeding.
  • Feverfew (Tanacetum parthenium)
  • Fish oil / omega-3 fatty acids
  • Gamma-linolenic acid (GLA) – e.g. evening primrose oil. Could have anticoagulant effects.
  • Garlic (Allium sativum)
  • Ginger (Zingiber officinale)
  • Ginkgo biloba
  • Ginseng (all types)
  • Glucosamine – may increase the anticoagulant effects of warfarin and increase the risk of bleeding, alone or in combination with chondroitin.
  • Goji berry / Chinese wolfberry (Lycium barbarum)
  • Goldenseal
  • Kava kava
  • Licorice
  • Milk thistle
  • N-acetyl glucosamine
  • Policosanol – may inhibit platelet aggregation
  • Psyllium
  • Red yeast rice
  • Saw palmetto (Serenoa repens)
  • St. John’s wort – may decrease the therapeutic effects of warfarin.
  • Vitamin E
  • Vitamin K – may reduce the anticoagulant effect of warfarin.
  • White willow bark – may increase the risk of bleeding.
  • Topical wintergreen oil products (due to systemic absorption of methyl salicylate in wintergreen gels, lotions, cream, ointment, and spray.
  • Turmeric/curcumin
  • Wormwood (Artemisia absinthium)
  • Yarrow

Acerola, acetyl-L-carnitine, activated charcoal, African wild potato, agar, agrimony, alchemilla, alder buckthorn, allspice, aloe, American chestnut, American elder, Andrographis, aniseed, antioxidants, apitherapy, arnica, asafoetida, ascorbigen, avocado

Baikal skullcap, barley, basil, bee pollen, berberine, bilberry, bishops weed, bistort, bitter orange, black currant, black mulberry, black and white pepper, black root, black seed, bladderwrack, blond psyllium, blue flag, blue-green algae, bogbean, boldo, borage, broccoli, bromelain, buchu, bupleurum, burdock, butternut

Cabbage, caffeine, capsicum, carrageenan, cascara, cassia, cat’s claw, celery, celery seed, chanca piedra, Chinese prickly ash, chitosan, chlorella, chrysin, cinchona, clove, cod liver oil, codonopsis, coffee, cola nut, coleus, colocynth, coltsfoot, conjugated linoleic acid, cordyceps, corn silk, cranberry, cumin

Dandelion, deer tongue, devil’s claw, DHA, DHEA, dehydroepiandrosterone, DMSO

Eastern hemlock, echinacea, eucalyptus, European barberry, European buckthorn, European chestnut, European mandrake, evodi

Fennel, fenugreek, flaxseed, flaxseed oil, fo-ti, forsythia, fulvic acid

Gamboge, gamma linolenic acid, german chamomile, glucomannan, goat’s rue, goji, goldenseal, goldthread, gossypol, grape, great plantain, greater bindweed, green coffee, guarana, guggul,

Hesperidin, higenamine, holy basil, honey, honeysuckle, hops, horny goat weed, horse chestnut, horseradish, hu zhang

Iceland moss, Indian frankincense, Indian gooseberry, indole-3-carbinol, inositol nicotinate, IP-6, ipriflavone

Jalap, Japanese apricot, jiaogulan,

Karaya gum, kava, kinetin, kiwi, krill oil, kudzu

L-arginine, L-carnitine, lime, limonene

Magnesium, magnolia, maitake mushroom, mangosteen, manna, marijuana, marjoram, marshmallow, meadowsweet, melatonin, melilot, mesoglycan, methoxylated flavones, Mexican scammony root, moringa, Mormon tea, myrrh

N-acetyl cysteine, nattokinase, noni, nopal (cactus), nutme

Olive leaf, onion, oolong tea, oregano, Oregon grape

Palm oil, pantethine, papain, papaya, passionflower, pau d’arco, pectin, peony, peppermint, Phellodendron, pomegranate, poplar, prickly ash, propionyl-L-carnitine, propolis, pue-erh tea, purple nut sedge, pycnogenol

Quassia, quercetin, quillaia, quince, quinidine

Raspberry ketone, red clover, reishi mushroom, resveratrol, rhatany, Rhodiola, rhubarb, rice bran, rose hip, rosemary, royal jelly

Safflower, sage, saw palmetto, schisandra, sea buckthorn, selenium, senna, serrapeptase, Siberian ginseng, slippery elm, smartweed, soy, spinach, stinging nettle, strawberry, sulforaphane, summer savory, swallowroot, sweet clover, sweet vernal grass, sweet woodruff

Tannic acid, tarragon, thyme, tiratricol, tonka beans, tragacanth, tree turmeric


Valerian, vanadium, vinpocetine, vitamin A, vitamin C

Water avens, watercress, wild carrot, wild cherry, wild lettuce, willow

Yarrow, yellow dock, yerba mate, Yohimbe

    Update to this list:

UPDATE 12/5/18: We are adding Frankincense Boswella Caterri to avoid list. Please see blog

Those who are at risk
*you are on blood thinners, such as Coumadin, Lovenox, (warfarin)
*you have hemophilia A, B or C or other bleeding disorders such as Von Willebrand
*you are prone to bloody noses and bruising
*you are going to have surgery
Essential oils are to never be ingested internally since essential oils are concentrated and are ideal for use as inhalation, in a bath, or applied directly to the skin with a carrier oil. The oil will slowly go through the skin to the bloodstream which acts as a time-release capsule. This does not overload the liver and vital organs. Essential is not for digesting instead consider fresh herbs or herbal tinctures for digesting. Digesting an Essential oil can overload liver cause serious damage to organs or worse cause death so please be wise and careful not to take internally. You will find that this practice is endorsed by mostly multi-level marketing companies (MLM) which we at Aytz Chayim Aroma are not.
Even inhalation can cause the blood to thin, so caution is warranted.
Think about it like this:
All it takes is inhaling a poisonous gas goes to the bloodstream and can kill. Inhaling essential oils do go to the bloodstream and can thin blood and interact with factor treatments or blood thinning medications.

Essential oils are to never be digested since essential oils are concentrated and are ideal for use as inhalation, in a bath,  or applied directly to the skin with a carrier oil. The oil will slowly go through the skin to the bloodstream which acts like a time-release capsule. This does not overload the liver and vital organs. Essential is not for digesting instead consider fresh herbs or herbal tinctures for digesting. Digesting an Essential oil can overload liver cause serious damage to organs or worse cause death so please be wise and careful not to take internally. You will find that this practice is endorsed by mostly multi-level  marketing companies (MLM)  which we at Aytz Chayim are not.


The International Federation of Aromatherapists Code of Ethics states –

“No Certified Aromatherapist should ever recommend the use essential oils for internal ingestion or internal application nor shall any aromatherapist advocate or promote such use of essential oils unless the practicing aromatherapist has medical, naturopathic, certified herbalist, clinical certified or similar qualifications and holds an insurance policy which specifically covers the internal application of essential oils.” (IFA code of ethics. Simply Essential, No. 11 December 1993).



DISCLAIMER: All information appearing on this site is based on traditional aromatherapy and is provided for educational reference purposes only, and is not intended to diagnose, treat, prevent or cureany disease. If you are suffering from any disease you should seek the assistance of a qualified health care professional. Essential oils are powerful and should be treated and used with care and understanding.

The statements on this site have not been evaluated by the FDA. These products are not intended to diagnose, treat, cure, or prevent any disease.  All information is for educational purposes only.  It’s advised that you always consult your family health practitioner.




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