Compare Dulcolax vs. Fibercon

Head-to-head comparisons of medication uses, side effects, ratings, and more.

Dulcolax
(bisacodyl)

Fibercon
(calcium polycarbophil)

Treats constipation. Dulcolax (Bisacodyl) works fast and the suppositories work even faster to relieve your constipation, as long as you're okay with it "cramping" your style a bit.Helps get things moving. Fibercon (Calcium Polycarbophil) is a natural fiber laxative that's safe enough to take during pregnancy. Just make sure you take it with plenty of liquid.
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Best available price for 30 (10mg) suppositories of bisacodyl
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Reviews & ratings
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5.14Dulcolax
Reviews for Dulcolax (bisacodyl)
65%
of people (All ages) say Dulcolax (bisacodyl) is worth it
49%
say it works well
16%
say it's a big hassle
160 reviews
Have you used Dulcolax (bisacodyl)?
Worth itNot sureNot worth it
Reviews for Fibercon (calcium polycarbophil)
45%
-20% worse vs. Dulcolax (bisacodyl)
28%
-21% worse vs. Dulcolax (bisacodyl)
21%
-5% worse vs. Dulcolax (bisacodyl)
Have you used Fibercon (calcium polycarbophil)?
Worth itNot sureNot worth it
Side effects
DulcolaxFibercon

We haven’t found good data for Dulcolax side effects.

FDA side effect reports for Dulcolax »

We haven’t found good data for Fibercon side effects.

FDA side effect reports for Fibercon »
How it works
DulcolaxFibercon
Dulcolax (Bisacodyl) is a stimulant laxative that you can take by mouth or in a suppository. It causes waves of contractions (peristalsis) in your intestine muscles to push stool through. It also makes stool more watery.Fibercon (Calcium Polycarbophil) is a fiber-based laxative. It adds bulk and moisture to your intestine, which softens stool and makes it easier to pass.
Type of medication
DulcolaxFibercon
Over-the-counter
Over-the-counter
Available as
DulcolaxFibercon
  • Pill
  • Suppository
  • Pill
Used for
DulcolaxFibercon
Risk factors for serious side effects
DulcolaxFibercon
  • Age 60 or older
  • Malignancy
  • Other condition that causes blockage or narrowing of bowel
  • Taking medications that cause constipation
  • Age 60 or greater
Detailed Dulcolax (bisacodyl) risks & warnings »
  • Taking with calcium supplements
  • Taking with oral bisphosphonates
  • Age 60 or older
  • Malignancy
  • Other condition that causes blockage or narrowing of bowel
Detailed Fibercon (calcium polycarbophil) risks & warnings »
Pregnancy

Research studies with animals found harmful effects on unborn babies. It hasn’t been properly studied in humans. The benefits might outweigh the risks even if you’re pregnant. Talk with your doctor.

The FDA hasn’t classified this medicine’s effects on unborn babies. Talk with your doctor about this medicine if you’re pregnant or planning on it.

Food
DulcolaxFibercon
  • Talk to you doctor about eating certain foods and getting more exercise to help prevent your constipation.
  • Talk to you doctor about eating certain foods and getting more exercise to help prevent your constipation.
Pain
DulcolaxFibercon
  • Don't take if you have stomach pain, nausea, vomiting, or had sudden changes in your stool for more than 2 weeks.
  • If you take Fibercon then have chest pain, vomiting, trouble breathing or swallowing, get medical help immediately.
  • Ask your doctor before taking Fibercon if you have stomach pain, nausea, vomiting or had sudden changes in your stool for more than 2 weeks.
Weight
DulcolaxFibercon
No weight related info.
  • Less gas and bloating compared to psyllium laxative products.
Upsides and benefits
DulcolaxFibercon
  • Most people said it was worth taking and it wasn't too much of a hassle.
  • Tablets give overnight relief of your constipation.
  • Dulcolax can also be used to treat constipation caused by spinal cord injury.
  • Suppositories give you quick relief without having to drink a large amount of liquid medicine.
  • Some people felt Fibercon was a hassle but still worth it.
  • It's safe to use short-term during pregnancy and breast-feeding as long as you take it with plenty of liquid, but you should still check with your baby doctor first.
  • Less gas and bloating compared to psyllium laxative products.
Downsides and risks
DulcolaxFibercon
  • Dulcolax can cause cramping, stomach upset, feeling faint, and the feeling that you "have to go right now".
  • You have to be comfortable with putting the medicine in your rectum.
  • Suppositories can cause slight rectal burning.
  • You may have to take Fibercon daily for 1-3 days to see full effects.
  • If you don't take it with enough liquid, it could swell and block your throat and cause choking.
  • Not the best choice for people who have swallowing problems or aren't able to drink lots of liquids.
  • Can cause heartburn, gas, and belly cramps.
Tips from our pharmacists for people taking the medication
DulcolaxFibercon
  • Swallow tablets whole (don't chew or crush) at bedtime, but not for more than one week.
  • Tablet works in 6 to 12 hours. Suppository works in 15 minutes to an hour, so make sure you're near a bathroom.
  • Don't take tablets within 1 hour of taking antacids, milk or dairy products.
  • Be sure to remove the wrapper from the suppository before inserting it into your rectum.
  • Ask your doctor about giving Dulcolax to anyone younger than 6 years.
  • Don't take if you have stomach pain, nausea, vomiting, or had sudden changes in your stool for more than 2 weeks.
  • Check with your baby doctor before using or if you're breast-feeding.
  • Talk to you doctor about eating certain foods and getting more exercise to help prevent your constipation.
  • It's important to take each dose with at least 8 ounces (a full glass) of water or other liquid. Works in about 12-72 hours.
  • Don't take more than 8 caplets in a 24 hour period without asking your doctor first and not for more than one week.
  • Don't take Fibercon within 2 hours before or after taking other medicines. It may interact and affect how they work.
  • If you take Fibercon then have chest pain, vomiting, trouble breathing or swallowing, get medical help immediately.
  • Ask your doctor before taking Fibercon if you have stomach pain, nausea, vomiting or had sudden changes in your stool for more than 2 weeks.
  • Ask your doctor about giving Fibercon to anyone younger than 12 years.
  • Talk to you doctor about eating certain foods and getting more exercise to help prevent your constipation.
Learn more
More about DulcolaxSide effectsReviews & ratingsAlternativesFDA package insert
Have you used Dulcolax (bisacodyl)?
Worth itNot sureNot worth it
More about FiberconSide effectsReviews & ratingsAlternativesFDA package insert
Have you used Fibercon (calcium polycarbophil)?
Worth itNot sureNot worth it