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Related Concept Videos

Drugs Affecting GI Tract Motility: Serotonin Receptor Agonists01:23

Drugs Affecting GI Tract Motility: Serotonin Receptor Agonists

Serotonin, a crucial neurotransmitter synthesized by enterochromaffin cells, plays a cardinal role in regulating gastrointestinal (GI) motility. With over 90% of the body's total serotonin in the GI tract, its influence on digestive processes is profound. Serotonin is swiftly released upon various stimuli, such as food boluses or certain drugs, triggering intrinsic sensory neurons in the myenteric plexus and extrinsic vagal and spinal sensory neurons. This leads to the activation of the...
Drugs for Treatment of Constipation-Predominant IBS01:21

Drugs for Treatment of Constipation-Predominant IBS

Pharmacological therapies for IBS-C are designed to alleviate abdominal discomfort and enhance bowel function. In patients with IBS-C, fiber supplements may help soften stools and decrease straining, but may also lead to increased gas production and bloating. Osmotic laxatives like milk of magnesia are frequently used to soften stools and increase stool frequency in IBS-C patients. In addition, two drugs approved for use in severe IBS-C adult cases are linaclotide (Linzess) and lubiprostone...
Drugs for Treatment of Diarrhea-Predominant IBS01:17

Drugs for Treatment of Diarrhea-Predominant IBS

Diarrhea-predominant irritable bowel syndrome (IBS-D) is a subtype of IBS characterized primarily by frequent, loose, or watery stools, abdominal pain, and abdominal discomfort. Therapeutic approaches to managing IBS-D include dietary changes, stress management techniques, and pharmaceutical interventions.
Two specific drugs used in the treatment are alosetron (Lotronex) and eluxadoline (Viberzi). Alosetron, a 5-HT3 antagonist, works by slowing the movement of stools in the gut, reducing bowel...
Drugs Affecting GI Tract Motility: Dopamine Receptor Antagonists01:28

Drugs Affecting GI Tract Motility: Dopamine Receptor Antagonists

Prokinetic agents are specialized medications that stimulate gastrointestinal (GI) motility, promoting food movement through the GI tract. Dopamine, an inhibitory neurotransmitter, plays a significant role in this process, reducing GI motility and indirectly controlling the speed of digestion. Dopamine receptor antagonists, such as metoclopramide and domperidone, offer a unique advantage as prokinetic agents. By blocking the dopamine receptors, these drugs increase GI motility, improving food...
Drugs Affecting GI Tract Motility: Other Laxatives01:20

Drugs Affecting GI Tract Motility: Other Laxatives

Laxatives are primarily used to alleviate constipation, a common gastrointestinal disorder characterized by infrequent bowel movements and difficulty passing stools. They work by various mechanisms to increase the volume or frequency of bowel movements. The primary modes of action of laxatives include increasing stool bulk, softening the stool, stimulating intestinal motility, and osmotically drawing water into the intestines.
Osmotic or saline laxatives, like magnesium hydroxide or milk of...
Drugs Affecting GI Tract Motility: Bulk-Forming and Stimulant Laxatives01:22

Drugs Affecting GI Tract Motility: Bulk-Forming and Stimulant Laxatives

Laxatives enhance bowel movements and alleviate constipation. They augment the stool's bulk, stimulate intestinal muscle contractions, draw water into the intestines, or soften the stool. There are five key types of laxatives: bulk laxatives, stimulant laxatives, osmotic laxatives, stool softeners, and lubricant laxatives.
Bulk-forming laxatives, such as psyllium, methylcellulose, and polycarbophil, absorb water in the intestine, increasing stool bulk and promoting bowel movement. This makes...

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Related Experiment Video

Updated: Jun 18, 2026

Chemical Inactivation of the E3 Ubiquitin Ligase Cereblon by Pomalidomide-based Homo-PROTACs
10:44

Chemical Inactivation of the E3 Ubiquitin Ligase Cereblon by Pomalidomide-based Homo-PROTACs

Published on: May 15, 2019

Prucalopride.

James E Frampton1

  • 1Adis, a Wolters Kluwer Business, Auckland, New Zealand. demail@adis.co.nz

Drugs
|November 17, 2009
PubMed
Summary
This summary is machine-generated.

Prucalopride effectively treats severe chronic constipation by improving bowel habits and patient satisfaction. This serotonin 5-HT(4) receptor agonist demonstrates good tolerability and long-term efficacy in clinical trials.

Related Experiment Videos

Last Updated: Jun 18, 2026

Chemical Inactivation of the E3 Ubiquitin Ligase Cereblon by Pomalidomide-based Homo-PROTACs
10:44

Chemical Inactivation of the E3 Ubiquitin Ligase Cereblon by Pomalidomide-based Homo-PROTACs

Published on: May 15, 2019

Area of Science:

  • Gastroenterology
  • Pharmacology

Background:

  • Chronic constipation affects a significant patient population, often with inadequate relief from existing therapies.
  • Prucalopride is a selective serotonin 5-HT(4) receptor agonist with enterokinetic properties.

Purpose of the Study:

  • To evaluate the efficacy and safety of prucalopride in patients with severe chronic constipation.
  • To assess the long-term maintenance of treatment benefits and patient satisfaction.

Main Methods:

  • Three large, randomized, double-blind, multicentre trials were conducted over 12 weeks.
  • Patient diary data and standardized assessments were used to measure outcomes.
  • Long-term follow-up studies assessed maintenance of efficacy and safety.

Main Results:

  • Prucalopride (2 mg/day) significantly improved bowel habits and patient-reported outcomes compared to placebo.
  • No additional benefit was observed with 4 mg/day compared to 2 mg/day.
  • Improvements in satisfaction were maintained up to 24 months.
  • Prucalopride was generally well-tolerated with mild to moderate, transient adverse events.
  • Cardiovascular safety, including QT interval, was comparable to placebo.

Conclusions:

  • Prucalopride is an effective and well-tolerated treatment for severe chronic constipation.
  • The 2 mg/day dosage provides significant benefits for bowel habits and quality of life.
  • Long-term use of prucalopride maintains patient satisfaction and demonstrates a favorable safety profile.