Compare Dulcolax vs. Miralax

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

Dulcolax (Bisacodyl)

Over-the-counter
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.

5.1/ 7 average rating with 160 reviewsforDulcolax
Helps get things moving.

Miralax (Polyethylene Glycol) provides effective relief of constipation without "cramping" your style.

5.5/ 7 average rating with 226 reviewsforMiralax
Upsides
  • 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.
  • Miralax is the most recommended laxative by pharmacists and doctors.
  • Most people felt it was worth the hassle.
  • It's gluten and sugar free.
  • It causes little to no cramping, bloating, gas, or feelings like you "have to go right now" compared to some other medicines to treat constipation.
  • Works differently than other over-the-counter laxatives so it's a great alternative if other medicines haven't worked.
Downsides
  • 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 have to dissolve Miralax in a beverage and drink it versus taking a pill.
  • It's not for children 16 years or younger.
  • Miralax doesn't work overnight. It can take up to 2-4 days to have a bowel movement.
  • It's not recommended that you take it for more than a week, so it you haven't had any success, you'll need to call your doctor for other laxative options.
Used for
Dosage forms
  • Pill
  • Suppository
  • Liquid
No pricing information available
No pricing information available
Want to save even more money?
Sign up now for a 30-day trial and save up to 95% at Kroger, Albertsons, Safeway, and other pharmacies.
Reviews
160 
65%
think this treatment is worth it
49%
think this treatment works well
16%
think this treatment is a hassle

Have you used Dulcolax (Bisacodyl)?

Leave a review
226 
75%
think this treatment is worth it
54%
think this treatment works well
10%
think this treatment is a hassle

Have you used Miralax (Polyethylene Glycol)?

Leave a review
Side effects
The Dulcolax (Bisacodyl) FDA package insert doesn’t have numbers about how common side effects are.
The Miralax (Polyethylene Glycol) FDA package insert doesn’t have numbers about how common side effects are.
Risks and warnings
  • Bowel blockage

    Age 60 or older

    ...and 3 more risk factors

  • Laxative dependence

    Age 60 or greater

    ...and 2 more risk factors

  • Risk to fetus

    Women of childbearing age

See more detailed risks and warnings
  • Electrolyte imbalance

    Taking with medications that cause electrolyte imbalance

    ...and 1 more risk factors

  • Risk to fetus

    Women of childbearing age

  • Bowel blockage

    Age 60 or older

    ...and 3 more risk factors

See more detailed risks and warnings