Acts as a cardiac hormone with a variety of biological actions including natriuresis, diuresis, vasorelaxation, and inhibition of renin and aldosterone secretion. It is thought to play a key role in cardiovascular homeostasis. Helps restore the body\'s salt and water balance. Improves heart function.

Catalpol, an iridoid glycoside, has neuroprotective, anti-inflammatory, and anti-hepatitis virus effects.

Mepyramine is a histamine H1 antagonist. It has mild hypnotic properties and some local anesthetic action and is used for allergies both parenterally and locally.