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. Full agonists are opioid drugs that bind to mu opioid receptors in the brain, and cause them to produce endorphins which give analgesic (pain relief) and, depending on the dose and frequency, addictive effects and feelings of euphoria.