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.
Strictly speaking, agonist & antagonist refer to the action of a molecule at a receptor. An agonist molecule produces the same effect as whatever molecule normally binds to that receptor. An antagonist molecule blocks the effects of the molecule that normally binds to that receptor. An inverse agonist produces the opposite effect to the molecule that normally binds to a receptor.