Types of Laxatives for Constipation

Fiber supplements soften the stool and stimulate a bowel movement. There are three basic types, each of which uses a different ingredient: psyllium, calcium polycarbophil, or methylcellulose. As with all laxatives, it is essential to drink plenty of fluids. And not all fiber supplements are the same. Here's a quick overview:

• Psyllium breaks down in the gut and becomes a food source for the good gut bacteria. It's used for a range of conditions, including IBS, and diverticulosis (note: it's not recommended for diverticulitis). One big side effect: psyllium can cause intestinal gas. 
• Calcium polycarbophil absorbs water in the digestive tract, making stools softer and bulkier. One drawback: it needs to be spaced out with other medications you're taking to ensure it's absorbed properly. 
• Methylcellulose, like polycarbophil, is plant-based and absorbs water in the gut. It's much less likely to cause intestinal gas than other fiber laxatives.

Osmotic laxatives work by increasing the amount of fluid secreted within the intestines, resulting in softer and easier-to-pass stools. The three major osmotic laxatives are Miralax, Lactulose, and Milk of Magnesia.

• Miralax, the brand name for polyethylene glycol PEG, acts similarly to fiber laxatives, as it draws water into the stool making it softer and easier to pass. It also stimulates more frequent bowel movements. Miralax has been found to cause less gas and bloating than other osmotic laxatives. 
• Lactulose increases the speed of intestinal contractions, stimulating bowel movements. 
• Milk of Magnesia is no longer widely recommended because of the potential complications it may cause for patients with heart or kidney disease. There are safer and more effective options available.

There are many different herbs have a reputation for having laxative effects. Aloe latex, cascara sagrada, frangula, rhubarb, and senna are all examples of herbal stimulant laxatives.

Herbal laxatives contain anthranoids, chemical compounds that stimulate the intestines, improving motility in the gut (in other words, keeping things moving along more quickly).

Stimulant laxatives work by speeding up the movement of intestinal muscles, thus inducing a bowel movement. Many of the well-known products sold in your drug store are stimulant laxatives, including Carters Little Pills, ExLax, and Dulcolax.

Stool softeners do just what the name suggests: soften the stool so it's easier to pass. They perform many of the same functions of a laxative, but technically aren't laxatives because they don't stimulate the gut. Most stool softeners contain a medication called docusate. Brand names include Colace, Doxinate, and Fleet Sof-Lax.

There are times when a stool softener is a better option than a laxative to relieve constipation, especially if you have hemorrhoids or are pregnant (or both). You should consult your healthcare provider to determine which one is the best choice to help you get things moving again.