Digitalis is used most frequently in the form of the tincture.

It has no action on the skin or mucous membranes, but is readily absorbed from the latter.

It slows and strengthens the heart, contracts the blood vessels, raises the blood pressure, and increases the excre tion of the urine. In toxic doses the heart becomes rapid and death is caused by excessive stimulation of the cardiac muscle.

It is excreted slowly in the urine.