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From Biology-Online Dictionary | Biology-Online Dictionary
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(Science: pharmacology) general term for pharmacologically active compounds from the foxglove (digitalis).

The active substances are the cardiac glycosides, digoxin, digitoxin, strophanthin and ouabain.

causes increased force of contraction of the heart, disturbance of rhythm and reduced beat frequency. Also causes arteriolar constriction, venous dilation, nausea and visual disturbances.