Compare Dulcolax vs. Lactulose

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

Dulcolax
(bisacodyl)

Generlac
(lactulose)

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.Coming soon.
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Coupons for Dulcolax
Best available price for 60 (100mg) capsules of dulcolax
Coupons for Lactulose
Best available price for 900 (10g/15ml) oral solutions of lactulose
Reviews & ratings
Filter group. All currently selected
Filter group. All currently selected
5.14Dulcolax
Reviews for Dulcolax
65%
of people (All ages) say Dulcolax 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

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

Have you used Generlac (lactulose)?
Worth itNot sureNot worth it
Side effects
DulcolaxLactulose

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

FDA side effect reports for Dulcolax »

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

FDA side effect reports for Lactulose »
How it works
DulcolaxLactulose
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.Coming soon.
Type of medication
DulcolaxLactulose
Over-the-counter
Available as
DulcolaxLactulose
  • Pill
  • Suppository
  • Liquid
Used for
DulcolaxLactulose
  • Constipation Hepatic Encephalopathy Treatment And Prophylaxis
Risk factors for serious side effects
DulcolaxLactulose
  • 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 »
    Coming soon.
    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.

    Research studies with animals haven’t found a risk to unborn babies, but it hasn’t been properly studied in humans.

    Food
    DulcolaxLactulose
    • Talk to you doctor about eating certain foods and getting more exercise to help prevent your constipation.
    No food related info.
    Pain
    DulcolaxLactulose
    • Don't take if you have stomach pain, nausea, vomiting, or had sudden changes in your stool for more than 2 weeks.
    No pain related info.
    Upsides and benefits
    DulcolaxLactulose
    • 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.
    Coming soon
    Downsides and risks
    DulcolaxLactulose
    • 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.
    Coming soon
    Tips from our pharmacists for people taking the medication
    DulcolaxLactulose
    • 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.
    Coming soon
    Learn more
    More about DulcolaxSide effectsReviews & ratingsAlternativesFDA package insert
    Have you used Dulcolax (bisacodyl)?
    Worth itNot sureNot worth it
    More about LactuloseSide effectsReviews & ratingsFDA package insert
    Have you used Generlac (lactulose)?
    Worth itNot sureNot worth it