Pharmacognosy

a toxic alkaloid found in certain tropical South American trees that is a powerful relaxant for striated muscles

perennial Eurasian herb with reddish bell-shaped flowers and shining black berries; extensively grown in United States; roots and leaves yield atropine

any of several plants of the genus Digitalis

a poisonous crystalline alkaloid extracted from the nightshade family; used as an antispasmodic and to dilate the eye pupil; also administered in large amounts as an antidote for organophosphate nerve agents or organophosphate insecticides

any shrub or small tree of the genus Rauwolfia having leaves in whorls and cymose flowers; yield substances used medicinally especially as emetics or purgatives or antihypertensives

medicine used to treat diarrhea

an addictive narcotic extracted from seed capsules of the opium poppy