Compare lactulose vs. Fibercon

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

Generlac
(lactulose)

Fibercon
(calcium polycarbophil)

Relieves constipation and gets rid of ammonia in people with liver problems. Generlac (lactulose) relieves constipation and high ammonia levels, but it can take up to 48 hours to work.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.
Reviews & ratings
Filter group. All currently selected
Filter group. All currently selected

Not enough reviews for this treatment. Help someone out, leave a review!

Have you used Generlac (lactulose)?
Worth itNot sureNot worth it
Reviews for Fibercon
45%
+55% better vs. lactulose
28%
+72% better vs. lactulose
21%
+21% better vs. lactulose
Have you used Fibercon (calcium polycarbophil)?
Worth itNot sureNot worth it
Side effects
lactuloseFibercon

The lactulose FDA package insert doesn’t have numbers about how common side effects are.

More about lactulose side effects »

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

FDA side effect reports for Fibercon »
How it works
lactuloseFibercon
Generlac (lactulose) draws water into the intestines to soften your stool for easier passing. It also helps draw ammonia into your stool for removal from the body.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
lactuloseFibercon
Prescription onlyOver-the-counter
Available as
lactuloseFibercon
  • Liquid
  • Powder
  • Pill
Used for
lactuloseFibercon
Risk factors for serious side effects
lactuloseFibercon
  • Taking Generlac (lactulose) for more than 6 months
  • Elderly
  • Taking medications that cause mineral imbalance
  • Not exercising regularly
  • Diabetes
Detailed Generlac (lactulose) 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

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
lactuloseFibercon
No food related info.
  • Talk to you doctor about eating certain foods and getting more exercise to help prevent your constipation.
Pain
lactuloseFibercon
No pain related info.
  • 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
lactuloseFibercon
No weight related info.
  • Less gas and bloating compared to psyllium laxative products.
Upsides and benefits
lactuloseFibercon
  • Generlac (lactulose) is the first-choice treatment for brain conditions caused by high ammonia levels.
  • Can be used if you have severe chronic constipation leading to blockage.
  • Available in generic.
  • Can be taken orally or rectally.
  • 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
lactuloseFibercon
  • Should not be used if you are on a galactose-restricted diet.
  • Does not provide rapid relief of constipation. Talk to your doctor or pharmacist if you need quick relief.
  • Generlac (lactulose) has a very sweet flavor that most people don't like.
  • 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
lactuloseFibercon
  • Generlac (lactulose) works within 24 to 48 hours to produce a bowel movement.
  • If you are taking this for constipation, it is usually taken once a day.
  • The goal is for you to have 2 to 3 stools a day.
  • You can mix the oral solution in juice, water, or milk for better taste.
  • Generlac (lactulose) can cause you to be dehydrated, so make sure you drink plenty of fluids.
  • Maintaining a healthy diet, regular exercise, and drinking plenty of fluids can help you prevent 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 lactuloseSide effectsReviews & ratingsAlternativesFDA package insert
Have you used Generlac (lactulose)?
Worth itNot sureNot worth it
More about FiberconSide effectsReviews & ratingsAlternativesFDA package insert
Have you used Fibercon (calcium polycarbophil)?
Worth itNot sureNot worth it