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.
On the other hand, antagonists though help in binding receptors, they do not alter its activity. When agonist is a compound that impersonate the action of neurotransmitter, antagonist blocks the action of neurotransmitter. Agonists combine with other chemical substances and promote some action.