Compare Imodium vs. Tums

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

Imodium (Loperamide)

Over-the-counter

Tums (Calcium carbonate)

Over-the-counter
Treats diarrhea.

One day is too many days to have diarrhea. Having Imodium (Loperamide) on hand to relieve your symptoms can be a life-saver.

4.2/ 5 average rating with 285 reviewsforImodium
Relieves heartburn.

Tums (Calcium carbonate) gives quick relief for heartburn, but does not last all day. Talk to your doctor or pharmacist about other medicines if you need additional relief.

3.8/ 5 average rating with 1373 reviewsforTums
Upsides
  • Most people who take Imodium feel there's no hassle and it's definitely worth it!
  • Non-habit forming and available over-the-counter.
  • It comes in caplets, liquid, and chewable tablets so you can use it anywhere you need it.
  • Imodium is used for short-term, chronic and traveler's diarrhea. It's also used for people who have diarrhea caused by cancer or certain medicines that treat cancer.
  • Tums (Calcium carbonate) is an effective, first-line medication for hearburn.
  • Tums (Calcium carbonate) starts working in seconds.
  • Has minimal side effects.
  • Available in chewable form.
  • Is inexpensive and readily available over-the-counter.
  • Coupons are available – speak to your doctor or pharmacist.
Downsides
  • Imodium only treats your diarrhea symptoms. Diarrhea may be caused by a number of conditions and will need specific treatment that deals with the underlying issue.
  • Studies in people taking Imodium for chronic diarrhea showed if the maximum number of doses didn't relieve symptoms in 10 days, then it probably won't work for that condition. You can talk to your doctor about other treatment options.
  • Because Tums (Calcium carbonate) only lasts for 1 to 2 hours, you may need additional doses.
  • May increase calcium levels too much in people with kidney or thyroid conditions.
  • May have a chalky taste.
Used for
Dosage forms
  • Pill
  • Chewable tablet
  • Liquid
  • Chewable tablet
  • Liquid
Price
No pricing information available
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Reviews
285 reviews so far
89%
saidit'sworth it
65%
saiditworked well
6%
saidit'sa big hassle

Have you used Imodium (Loperamide)?

Leave a review
1373 reviews so far
82%
saidit'sworth it
43%
saiditworked well
5%
saidit'sa big hassle

Have you used Tums (Calcium carbonate)?

Leave a review
Side effects
1possible side effects
  • Constipation
    3%
See more detailed side effects
The Tums (Calcium carbonate) FDA package insert doesn’t have numbers about how common side effects are.
Risks and risk factors
  • Allergic reactions
    • Allergy to loperamide
  • Driving impairment
    • Taking with alcohol
    • Taking other medicines that make you less alert
  • Liver problems
    • Current liver problems
  • Serious intestinal problems
    • Taking HIV medicines
    • Active infectious colitis
  • Risk to fetus
    • Women of childbearing age
See more detailed risks and warnings
No information currently available