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Loperamide: Uses, Side Effects and Dosage

Updated:
Facts
Status:
Over-the-counter (OTC)
Strength:
2 mg
Active ingredient:
ATC code:

Patient Medication Information: uses, side effects, how to take - Loperamide

ABOUT THIS MEDICATION

What the medication is used for:

LOPERAMIDE is used for the rapid relief of diarrhea symptoms.

What it does:

LOPERAMIDE makes the stools more solid and less frequent.

When it should not be used:

You should not use LOPERAMIDE if you have any of the following conditions:

  • if there is blood in the stools or you have a fever;
  • if you are constipated or your abdomen is swollen or

    have abdominal pain;

  • if you have a bacterial infection in your digestive

    system, or suspect food-poisoning due to bacterial contamination;

  • if you have an inflammation of the lower bowel;
  • if you are taking prescription drugs that may cause

    constipation such as anti-psychotic and anti-depressant medications;

  • if you are taking antibiotics or have ulcerative colitis;
  • if you know you are sensitive to one of the

    ingredients or to any other component of this formulation (see What the important nonmedicinal ingredients are);

  • if in doubt, ask your pharmacist or doctor for advice.

What the medicinal ingredient is:

The medicinal ingredient in LOPERAMIDE is: Loperamide Hydrochloride

What the non-medicinal ingredients are:

The non-medicinal ingredients in LOPERAMIDE are: D&C yellow #10, FD&C blue #1, lactose, magnesium stearate, microcrystalline cellulose and starch.

What dosage forms it comes in:

LOPERAMIDE is available as: 2 mg caplets.

WARNINGS AND PRECAUTIONS

KEEP THIS AND ALL DRUGS OUT OF THE REACH OF CHILDREN

BEFORE you use LOPERAMIDE talk to your doctor or pharmacist if you:

  • are pregnant or nursing a baby. LOPERAMIDE is not recommended for nursing mothers because small amounts of loperamide can end up in your milk;

  • have meningitis or liver disease, as you may need medical supervision while taking LOPERAMIDE.

STOP USE and see your doctor or pharmacist if:

  • Diarrhea gets worse, lasts longer than 48 hours or you get any unusual symptoms;
  • You are infected with HIV and you have any signs of abdominal swelling or bulging

Although LOPERAMIDE stops diarrhea, it will not treat the cause of it. Whenever possible, the cause of diarrhea should also be treated.

Tiredness, dizziness, or drowsiness may occur in the setting of diarrheal symptoms treated with loperamide. Therefore, it is advisable to use caution when driving a car or operating machinery.

Taking more than directed may cause serious heart problems leading to death.

INTERACTIONS WITH THIS MEDICATION

Always tell your doctor or pharmacist

  • if you are using other drugs including herbal medicines because some drugs should not be taken together
  • if you are taking drugs that slow down the action of the stomach and intestines (for example, some antidepressants and cold and allergy medication), because these can make the effect of LOPERAMIDE too strong.
  • if you are taking sedating medications.

In particular, tell your doctor or pharmacist if you are taking any of the following:

  • ritonavir (used to treat HIV)
  • quinidine (used to treat abnormal heart rhythms)
  • oral desmopressin (used to treat excessive urination)
  • itraconazole or ketoconazole (used to treat fungal infections)
  • gemfibrozil (used to lower cholesterol)

PROPER USE OF THIS MEDICATION

LOPERAMIDE should be taken by the mouth. You can take LOPERAMIDE at any time of day. The caplets should be taken with liquid.

When you have diarrhea,

  • you will lose a lot of fluids. Therefore, drink plenty of

    clear fluids, water, unsweetened juices or clear soups.

  • do not drink alcohol or milk and avoid fruit, green

    vegetables and spicy or fatty foods. These items tend to aggravate diarrhea.

Usual dose:

Adults (12 years and older): Take 2 caplets (4 mg) initially and 1 caplet every time you have a loose bowel movement, to a maximum of 8 caplets (16 mg) per day.

Stop use if you have a solid or hard stool or if you go for 24 hours without a bowel movement.

Overdose:

In case of drug overdose, contact a health care practitioner, hospital emergency department or regional Poison Control Centre immediately, even if there are no symptoms.

SIDE EFFECTS AND WHAT TO DO ABOUT THEM

LOPERAMIDE is usually well tolerated and few undesired effects are likely when it is taken as directed.

Constipation may occur. If so, stop LOPERAMIDE and if these effects are severe, consult your doctor.

Over sensitivity to LOPERAMIDE is rare. It can be recognized, for instance, by skin rash or itching. If any of these signs occur, see your doctor.

The following complaints sometimes occur, but they may be due to the diarrhea itself: nausea and vomiting, tiredness, dizziness or drowsiness, dry mouth and flatulence.

SERIOUS SIDE EFFECTS, HOW OFTEN THEY
HAPPEN AND WHAT TO DO ABOUT THEM
Symptom / effectTalk with your doctor or pharmacistStop taking drug and call your doctor or pharmacist

Only if

severe

In all cases
Uncommon

Abdominal pain

Difficulty urinating

Bloating

Shortness of breath

Swollen

face

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SERIOUS SIDE EFFECTS, HOW OFTEN THEY
HAPPEN AND WHAT TO DO ABOUT THEM
Symptom / effectTalk with your doctor or pharmacistStop taking drug and call your doctor or pharmacist

Only if

severe

In all cases

Abnormal coordination

Muscular tension

Pupil

constriction

Abdominal pain upper

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This is not a complete list of side effects. For any unexpected effects while taking LOPERAMIDE, contact your doctor or pharmacist.

HOW TO STORE IT

Store at room temperature (15°C to 30°C), protected from light and high humidity. Keep out of reach of children.

Reporting Side Effects

You can report any suspected side effects associated with the use of health products to Health Canada by:

  • Visiting the Web page on Adverse Reaction Reporting

    (https://www.canada.ca/en/health-canada/services/drugs-health-products/medeffect-canada/adverse-reaction-reporting.html) for information on how to report online, by mail or by fax; or

  • Calling toll-free at 1-866-234-2345.

NOTE: Contact your health professional if you need information about how to manage your side effects. The Canada Vigilance Program does not provide medical advice.

MORE INFORMATION

If you want more information about LOPERAMIDE:

  • Talk to your healthcare professional
  • Find the full product monograph that is prepared for healthcare professionals and includes this Consumer Information by visiting the Health Canada website (https://health-products.canada.ca/dpd-bdpp/index-eng.jsp). Find the Consumer Information on the manufacturer’s website

    (http://www.apotex.ca/products) or by calling 1-800-667-4708.

Last Revised: July 31, 2019

About this document

Source: Health Canada – Drug Product Database (DPD) and product monographs · DIN (Drug Identification Number): 02377764

Revision date stated in the text: July 31, 2019

Found a mistake? Write to us via the contact page.

The information on this site does not replace the advice of a doctor or pharmacist.

Drug information for Loperamide

Rx or OTC
Over-the-counter (OTC)?
DIN 02377764
Schedule(s) NON-PRESCRIPTION DRUGS
Active ingredient(s) Loperamide hydrochloride 2 MG
Dosage form(s) Tablet
Route(s) of administration Oral
Drug class (WHO ATC)
  1. A Alimentary tract and metabolism drugs
    1. A07 Antidiarrheals, intestinal antiinflammatory/antiinfective agents
      1. A07D Antipropulsives
        1. A07DA Antipropulsives
          1. A07DA03 Loperamide
Company APOTEX INC
Current status Approved
Current status date February 1, 2012

Source: Health Canada – Drug Product Database (DPD) and product monographs, data as of November 1, 2026. Data from the Health Canada Drug Product Database, as published there. Not a substitute for the advice of a doctor or pharmacist.