The "spastic colon" syndrome: therapeutic and pathophysiologic considerations

Area of Science:

• Gastroenterology
• Pharmacology

Background:

• Spastic colon syndrome, characterized by abdominal pain, is a common functional gastrointestinal disorder.
• The underlying pathophysiology involves abnormal colonic motility, potentially linked to the enteric nervous system.

Purpose of the Study:

• To investigate the efficacy of d-amphetamine plus propranolol in treating spastic colon symptoms.
• To explore the effects of these drugs on colonic manometric parameters.
• To elucidate the potential role of the myenteric plexus in spastic colon.

Main Methods:

• A study involving 165 patients diagnosed with "spastic colon".
• Administration of low doses of d-amphetamine combined with propranolol.
• Performance of manometric studies to assess colonic tone and activity, including sigmoidal hypertonicity and rectal inhibition.
• Comparison of drug effects with anticholinergic agents.

Main Results:

• Rapid and significant improvement in abdominal pain was observed in patients treated with d-amphetamine and propranolol.
• Concomitant reduction in sigmoidal hypertonicity and rectal inhibition was noted in manometric studies.
• Anticholinergic drugs also demonstrated a decrease in sigmoidal tone and phasic activity.

Conclusions:

• Low-dose d-amphetamine and propranolol offer a therapeutic option for managing spastic colon pain.
• The findings support the hypothesis that a hyperactive cholinergic-serotonergic system within the myenteric plexus contributes to the "spastic colon" syndrome.
• Further research into the neuropharmacology of the enteric nervous system is warranted for understanding and treating functional bowel disorders.