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This patient information on Sesquiterpene lactone mix is provided by John L. Meisenheimer, M.D. a board certified Dermatologist and skin care specialist based in Orlando, Florida.  This information is not intended as a substitute for the medical advice or treatment of a dermatologist or other physician.

The results from your patch testing showed a positive reaction (contact allergy) to Sesquiterpene lactone mix. Your immune system reacts with its defense mechanisms with each exposure of Sesquiterpene lactone mix to your skin. It is unknown why certain individuals develop allergic sensitivities. In some it may take repeat exposures over long periods of time before an allergy develops. Once you have become sensitized (allergic) your immune system always "remembers" and you will be Sesquiterpene lactone sensitive. If you currently have eczema this chemical may be the cause but other factors may play a role as well. The information below will help you avoid this allergen.

This is a screen for oils found in plants fro the composite family. Allergy can be to direct contact with the plant and or pollen or to skin care products that use the plant extracts. Outdoor occupations and hobbyists are at risk.

Where is chemical found?
►Cosmetics
►Creams
►Lotions
►Ointments
►Topical medicines (especially "natural")

Plants known to contain sesquiterpene lactones are listed below:

►Arnica
►Artichoke, globe
►Artichoke,wild
►Bitterweed
►Boneset
►Broomweed
►Burdock
►Capeweed
►Chamomile, Roman
►Chamomile,German
►Champaca of perfumery
►Chicory
►Chrysanthemum
►Cocklebur
►Cosmos
►Costus of perfumery
►Cotton thistle
►Encelia
►Feverfew
►Fireweed
►Fleabane
►Gayule
►Hampweed
►Ironweed
►Laurel oil
►Leafcup
►Lettuce
►Liverwort
►Marguerite
►Marigold
►Marsh elder
►Oxeye
►Pyrethrum
►Ragweed
►Sagebrush
►Sneezeweed
►Sow thistle
►Star thistle
►Stinkwort
►Sunflower
►Tansy
►Tulip tree
►Whitewood of commerce
►Wormwood
►Yarrow

Hints on avoiding chemical:

►Choose products listed only on your personalized Contact Allergen Database
which has been provided to you. Products listed on your contact allergen resource database will be free of Sesquiterpene lactone mix and safe to use.
►Please be aware that if your spouse or significant other uses topical skin care products that contain this chemical skin-to-skin transfer may occur to you.
►It may take 2 or 3 weeks of avoiding exposure before improvement of your eruption begins.

Possible Occupational Exposures:
    Florists
    Farmers
    Chefs
    Forestry workers

© John L. Meisenheimer, M.D.  2004                                   WWW.OrlandoSkinDoc.com

Last modified: 08/27/06