Listlessness, dissatisfaction, lack of interest; boredom:

Epsom salts
Hydrated magnesium sulfate, MgSO4.7H2O, used as a cathartic and to
reduce inflammation.

ergot
Fungus (Claviceps purpurea) infecting cereal plants; forms compact black
masses of branching filaments that replace many of the grains of the
host plant. Disease caused by such a fungus. The dried sclerotia of
ergot obtained from rye is a source of several medicinal alkaloids and
lysergic acid.

erigeron
Genus of composite herbs having flower heads resembling asters. Formerly
used as a diuretic and as a hemostatic in uterine hemorrhage

erysipelas
Acute skin disease caused by hemolytic streptococcus; marked by
localized inflammation and fever. Also called Saint Anthony's fire.

eschar
Dry scab or slough formed on the skin caused by a burn or by the action
of a corrosive or caustic substance.

eucaine
A crystalline substance, C15H21NO2, used as a local anesthetic,
substituting for cocaine, in veterinary medicine.

eucalyptol (cineole)