If you experience chronic constipation, or if eating prunes and drinking prune juice doesnât solve your problems, contact your doctor for professional advice. Also, make sure to talk to your doctor if you begin to experience: 1  rectal or abdominal pain.  blood in stool.
agonist agÂ·oÂ·nist (Äg'É-nÄ­st) n. A contracting muscle that is resisted or counteracted by an antagonistic muscle. A substance that can combine with a cell receptor to produce a reaction typical for that substance.
FULL AGONISTS, PARTIAL AGONISTS, ANTAGONISTS. Three types of opioids are classified by the effect that they have on the mu receptors on cells. They are the full agonist, the partial agonist and the antagonist. As used here, an agonist is something that stimulates or produces an effect. Agonist is derived from the Late Latin agnista which means contender which is derived from the Greek agonists which also means contestant which came from agon which means contest. An agonist is a chemical contestant or contender.