Laxatives

Definition

Laxatives are substances that promote bowel movements and relieve constipation. They work by increasing stool frequency, softening the stool, or stimulating intestinal motility.

5 Must Know Facts For Your Next Test

1. Laxatives can be classified into several types: bulk-forming, osmotic, stimulant, and stool softeners.
2. Overuse of laxatives can lead to dependency and a condition called laxative abuse syndrome.
3. Bulk-forming laxatives add fiber to the diet and are generally considered the safest for long-term use.
4. Osmotic laxatives draw water into the intestines to soften stools and make bowel movements easier.
5. Stimulant laxatives directly stimulate the intestinal muscles to induce bowel movements but should be used with caution.

Review Questions

• What are the main types of laxatives and their mechanisms of action?
• Why is it important to avoid overusing stimulant laxatives?
• How do bulk-forming laxatives differ from osmotic laxatives?

Related terms

Bulk-Forming Laxatives:

These add fiber to the stool, making it larger and softer.

Osmotic Laxatives:

These work by drawing water into the intestines to soften stools.

Stimulant Laxatives:

These stimulate intestinal muscles directly to promote bowel movements.