The oil had relaxant effects on the tracheal smooth muscle.
– Arzneimittelforschung 1985;35(1A):408-14 — Relaxant effects on tracheal and ileal smooth muscles of the guinea pig. — Reiter M, Brandt W.

Elecampane was one of the plants causing occupational contact dermatitis. The known chemical allergens causing dermatitis were tuliposide-A and sesquiterpene lactones, such as alantolactones and parthenolide, in the Liliaceae and Compositae families.
– Contact Dermatitis 1996 May;34(5):330-5 — Occupational allergic contact dermatitis caused by decorative plants. — Lamminpaa A, Estlander T, Jolanki R, Kanerva L.

Caused contact dermatitis after massage therapy liniment applied.
– Contact Dermatitis 1995 Oct;33(4):267 — Contact dermatitis due to a massage liniment containing Inula helenium extract. — Pazzaglia M, Venturo N, Borda G, Tosti A.