Epinephrine is added to the anaesthetic solution to constrict the blood vessels in the immediate area in order to reduce bleeding in the area and increase the duration of action of the anesthetic.

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Epinephrine (adrenaline) is added to local anesthetic solutions to constrict blood vessels in the area of injection. This vasoconstriction reduces bleeding and prolongs the action of the anesthetic by slowing its absorption into the bloodstream.

Epinephrine Is Added to the Anaesthetic Solution to Constrict the Blood