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.
An agonist is any drug that combines with a receptor and stimulates its activity. 1  The agonist binds with the receptor and is able to initiate a response. 2  Opiate agonists produce an opiate effect by interacting with opioid receptors. 3  An agonist is any drug that combines with a receptor and stimulates its activity.