Derm In-Review > Mnemonic Monday

It’s Mnemonic Monday! Sesquiterpene Lactones

On this Mnemonic Monday, we challenge you to remember plants producing the allergen sesquiterpene lactone with the following mnemonic:

SAD CHrissy FARtS Dandelions and Marigolds

SSesquiterpene lactones



ChChrysanthemum, Chamomile


Dandelions and Marigolds

Remember that this allergen cross-reacts with pyrethrins, so patients with chrysanthemum allergy should avoid permethrin


Click HERE to download or print your mnemonic card.

Study More!

Need a refresher on plant allergic contact dermatitis? Check out page 159  of your 2020 Derm In-Review Study Guide.

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Further Reading

Check out the following chart with plants causing allergic and irritant contact dermatitis published in the Journal of Drugs in Dermatology (JDD):

Plants are frequently implicated in skin disease, especially allergic and irritant contact dermatitis. The following chart is composed of plants that are often associated with skin disease and the facts about them that are commonly encountered on board examinations. Read the full article here.

Test your knowledge!

You diagnose a patient with scabies and she tells you that her only allergy is to sunflowers. Which of the following medications should be avoided in her?

A. Ivermectin

B. Malathion

C. Lindane

D. Permethrin

E. Precipitated sulfure

To find out the correct answer and read the explanation, click here.

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