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Losec (Cheplapharm Arzneimittel, Tablet (Delayed-Release)): Uses, Side Effects and Dosage

Updated:
Facts
Status:
Prescription (Rx) Current status: Cancelled Post Market
Strength:
20 mg
ATC code:

Patient Medication Information: uses, side effects, how to take - Losec (Cheplapharm Arzneimittel, Tablet (Delayed-Release))

What is LOSEC used for?

LOSEC is used to treat problems caused by too much acid in the stomach such as:

  • stomach ulcers (sores).
  • duodenal ulcers (sores on the first part of the intestine).
  • stomach and duodenal ulcers caused by a bacterium, Helicobacter pylori.
  • reflux esophagitis (tissue damage caused by stomach acid and juices moving up the food tube).
  • symptoms of reflux disease (e.g. heartburn, backup of stomach contents to the throat).
  • ulcers caused by nonsteroidal anti-inflammatory drugs (drugs for pain and sore joints).
  • dyspepsia, a group of symptoms which may include stomach pain/discomfort, heartburn and backup of stomach contents to the throat. Dyspepsia can be caused by the other conditions in this list.
  • a rare condition where the stomach produces too much acid (Zollinger-Ellison syndrome).

How does LOSEC work?

LOSEC is a medicine called a proton pump inhibitor (PPI). LOSEC works by reducing the amount of acid made in your stomach.

What are the ingredients in LOSEC?

Medicinal ingredient: omeprazole magnesium

Non-medicinal ingredients: hydroxypropyl methylcellulose, iron oxide, mannitol, methacrylic acid copolymer, microcrystalline cellulose, paraffin, polyethylene glycol, sodium starch glycolate, sodium stearyl fumarate, talc and titanium dioxide.

LOSEC comes in the following dosage forms:

Tablets of omeprazole 20 mg.

Do not use LOSEC if:

  • you are allergic to omeprazole, substituted benzimidazoles or any of the other ingredients in LOSEC (see “What are the ingredients in LOSEC?”).
  • you are taking rilpivirine.

To help avoid side effects and ensure proper use, talk to your healthcare professional before you take LOSEC. Talk about any health conditions or problems you may have, including if you:

  • have had any health problems in the past.
  • have severe liver problems now or have had in the past.
  • are pregnant or plan to become pregnant.

  • are breastfeeding or planning to breastfeed, as omeprazole is excreted in breast milk.
  • take any other medications, including ones you can buy without a prescription.
  • are due to have a specific blood test (Chromogranin A).

Other warnings you should know about:

LOSEC is not recommended for use in patients under 18 years of age.

This medicine should be used at the lowest dose and for the shortest time suitable for your condition. Talk to your doctor if you have any concerns about your treatment.

Treatment in combination with antibiotics: If you experience symptoms such as severe (bloody or repeated watery) diarrhea, with or without fever, abdominal pain or tenderness, you may have bowel inflammation caused by a bacterial infection (Clostridium difficile). If this happens, stop taking the drug combination and call your healthcare professional immediately.

Tell your doctor or pharmacist about symptoms that may be a sign of a more serious problem in your stomach or intestine such as:

  • trouble swallowing.
  • unplanned weight loss.
  • vomiting blood or food.
  • black (blood-stained) stools.

Long-term use of PPIs may interfere with the absorption of Vitamin B12 from the diet. This may cause a shortage of Vitamin B12 in your body. Talk to your doctor about this risk.

Long-term use of PPIs may lead to low blood magnesium in some people. When blood magnesium is lower than normal, it may also lead to low blood calcium and low blood potassium.

Using PPIs for a long time (every day for a year or longer) may increase risks of broken bones of the hip, wrist or spine. Talk to your doctor about this risk.

Using LOSEC for a long period of time may cause a growth in your stomach (polyp), especially after one year.

Tell your healthcare professional about all the medicines you take, including any drugs, vitamins, minerals, natural supplements or a

Serious Drug Interactions

  • Do not take LOSEC if you are taking rilpivirine (a drug used for HIV).

lternative medicines.

The following may interact with LOSEC:

  • medication for HIV: LOSEC may decrease the effectiveness of some drugs used for HIV treatment; atazanavir, nelfinavir, and saquinavir should not be used with LOSEC.
  • a high-dose of methotrexate (a drug used in high doses to treat cancer): LOSEC may need to be temporarily withdrawn.
  • clopidogrel, which is used for the prevention of blood clots: LOSEC may interact with this drug, therefore use with clopidogrel should be avoided.
  • Drug effects may be influenced if LOSEC is taken at the same time as some drugs used to prevent fungal infections (itraconazole, ketoconazole, voriconazole), anxiety (diazepam), epilepsy (phenytoin), blood clotting (warfarin or other vitamin K blockers), transplant rejection (tacrolimus), poor circulation in the legs (cilostazol)*, heart problems (digoxin), treatment for tuberculosis (rifampin), St John’s Wort (Hypericum perforatum) or a certain type of anticancer drug (erlotinib or any other anticancer drug from the same class).

* not marketed in Canada

How to take LOSEC:

Follow your doctor’s directions carefully. They may be different from the information contained in this leaflet.

  • Take all doses of LOSEC that your doctor prescribes even when you feel well. Doses every day are needed to help damaged areas heal.
  • If you take LOSEC with antibiotic drugs, it is important that you take all medications at the right time of day for the whole treatment period. Studies have shown that patients who take their medications as prescribed have better ulcer healing rates and greater success getting rid of their H. pylori infection.
  • Take LOSEC until your doctor tells you to stop. Even if you start to feel better in a few days, your symptoms may return if LOSEC is stopped too soon. LOSEC needs to be taken for the full treatment to help correct acid problems.
  • LOSEC may be taken with food or on an empty stomach.

  • Do not chew or crush your LOSEC tablets. Swallow the tablet whole with half a glass of water.

Usual dose:

Your doctor may tell you to take LOSEC:

  • 20-40 mg once a day for 2-8 weeks to heal damaged areas.
  • 20-40 mg to control symptoms of reflux disease or to stop reflux esophagitis from coming back.
  • 20 mg to stop ulcers from returning while you take your medicine for pain and joint problems.
  • 60 mg once a day to treat Zollinger-Ellison syndrome
  • In combination with antibiotic drugs for one week to treat ulcers caused by Helicobacter pylori.

    • as Omeprazole, Amoxicillin and Clarithromycin Triple Therapy: The recommended dose for eradication of H. pylori is LOSEC 20 mg, amoxicillin 1,000 mg and clarithromycin 500 mg, all twice daily for seven days.
    • or as Omeprazole, Metronidazole and Clarithromycin Triple Therapy: The recommended dose for eradication of H. pylori is LOSEC 20 mg, metronidazole 500 mg and clarithromycin 250 mg, all twice daily for seven days.
    • If your ulcer is bothering you, your doctor may recommend further treatment with LOSEC to make sure that your ulcer is healed.

How to use the LOSEC Compliance Pack

There are 14 days of labelled tablets, with one extra to make 15. All 15 tablets are exactly the same (including the one labelled "Take this tablet last"). When you have finished the 14 labelled tablets in the blister pack, take the one marked "Take this tablet last". Then start your next blister pack.

To treat ulcers caused by Helicobacter pylori, take one 20 mg tablet from each row (2 tablets per day) that match the day you begin the pack.

Overdose:

If you think you, or a person you are caring for, have taken too much LOSEC, contact a healthcare professional, hospital emergency department, or regional poison control centre immediately, even if there are no symptoms.

Missed Dose:

If you miss a dose of LOSEC and remember within 12 hours, take it as soon as possible. Then go back to your regular schedule. However, if more than 12 hours have passed when you remember, do not take the missed tablet. Do not double the dose. Just take your next dose on time.

What are possible side effects from using LOSEC?

Like all medicines, LOSEC may cause side effects in some people. Side effects are usually mild and go away a short time after starting LOSEC.

These are not all the possible side effects you may have when taking LOSEC. If you experience any side effects not listed here, tell your healthcare professional.

Tell your doctor right away if you have any of these symptoms:

  • New or worsening joint pain.
  • Rash on your cheeks or arms that gets worse in the sun.

Common side effects (≥ 1 in 100 patients):

  • Headache.
  • Diarrhea.
  • Constipation.
  • Abdominal pain.
  • Nausea/ vomiting.
  • Excess gas in stomach (flatulence).

Uncommon side effects (≥ 1 in 1,000 patients, but < 1 in 100 patients):

  • Dizziness.
  • Feeling like you or your surroundings are moving (vertigo).
  • Difficulty sleeping.
  • Feeling sleepy.
  • Sensation of burning/ prickling/ numbness.

Rare side effects (< 1 in 1,000 patients):

  • Dry mouth.
  • Hair loss.
  • Increased sweating.
  • Taste disorders.

Stopping your PPI therapy after taking it for a long time may cause your symptoms to get worse and your stomach may increase acid production. Carefully follow your doctor’s instructions when stopping LOSEC.

Serious side effects and what to do about them

Symptom / effectTalk to your healthcare professionalStop taking drug and get immediate medical help
Only if severeIn all cases
UNCOMMON
Skin reactions (such as skin rash, dermatitis, itchy skin and / or hives)X
RARE
Inflammation in the mouthX
Gastrointestinal fungal infectionX
Inflammation of the kidneyX
Liver problems, i.e., inflammation of the liver with or without jaundice, impaired liver functionX
Blood disorders (reduced number of cells in the blood, low blood sodium)X

Serious side effects and what to do about them

Symptom / effectTalk to your healthcare professionalStop taking drug and get immediate medical help
Only if severeIn all cases
Sore joints and musclesX
Muscular weaknessX
Development of breasts in malesX
Sensitivity to sunlightX
Severe skin reactionsX
Hypersensitive (allergic) reactions (such as swelling of tissues, fever, discomfort / tightness in chest and anaphylactic shock)X
Blurred visionX
If you already have severe liver disease, you may experience disorientation / aggression / confusion / decreased consciousnessX
If you are very ill, you may feel confused, nervous, depressed or hallucinateX
VERY RARE

Low blood magnesiumθ

(which may result in low blood calcium and / or low blood potassium)

X
UNCOMMON

Serious side effects and what to do about them

Symptom / effectTalk to your healthcare professionalStop taking drug and get immediate medical help
Only if severeIn all cases

Microscopic colitis (inflammation of the gut)

  • Chronic watery diarrhea
  • Abdominal pain, cramps or bloating
  • Weight loss
  • Nausea
  • Uncontrolled bowel movement
  • Signs of dehydration such as extreme thirst, less frequent urination, dark-coloured urine, fatigue, dizziness, confusion

The symptoms of microscopic colitis can come and go frequently. If you have watery diarrhea that lasts more than a few days, contact your doctor.

X
Acute generalized exanthematous pustulosis (AGEP) (severe skin rash): small bumps surrounded by red skin, itching, fever, skin painX
Drug reaction with eosinophilia and systemic symptoms (DRESS) (serious skin reaction that may affect more than one or more organs): fever, severe rash, swollen lymph glands, flu-like feeling, yellow skin or eyes, shortness of breath, dry cough, chest pain or discomfort, feel thirsty, urinate less oftenX

θ These would only be seen if a blood test was taken.

If you have a troublesome symptom or side effect that is not listed here or becomes bad enough to interfere with your daily activities, tell your healthcare professional.

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.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.

Storage:

Keep all tablets sealed in the blister strips or bottle until it is time for a dose. If you do not, moisture from the air may damage the tablets.

Keep the compliance pack at room temperature (15-30°C). Do not keep LOSEC in the bathroom medicine cabinet or other warm, moist places.

Do not use LOSEC after the expiry date marked on the pack.

Keep out of sight and reach of children.

If you want more information about LOSEC:

  • Talk to your healthcare professional
  • Find the full product monograph that is prepared for healthcare professionals and includes this Patient Medication Information by visiting the Health Canada website: https://www.canada.ca/en/health-canada/services/drugs-health-products/drug-products/drug-product-database.html; the Xediton Pharmaceuticals Inc. website: www.xediton.com, or by calling Xediton Pharmaceuticals Inc. at 1-888-XEDITON (933-4866).

Manufacturer:

CHEPLAPHARM Arzneimittel GmbH

Ziegelhof 24

17489 Greifswald

Germany

Importer / Distributor:

Xediton Pharmaceuticals Inc,

2000 Argentia Rd,

Mississauga, Ontario L5N 1W1

Tel: 1-888-XEDITON (933-4866)

LOSEC® is a registered trademark.

Last Revised: May 18, 2022

About this document

Source: Health Canada – Drug Product Database (DPD) and product monographs · DIN (Drug Identification Number): 02190915

Revision date stated in the text: May 18, 2022

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 Losec (Cheplapharm Arzneimittel, Tablet (Delayed-Release))

Rx or OTC
Prescription (Rx)?
DIN 02190915
Schedule(s) PRESCRIPTION
Active ingredient(s) Omeprazole (omeprazole magnesium) 20 MG
Dosage form(s) Tablet (Delayed-Release)
Route(s) of administration Oral
Drug class (WHO ATC)
  1. A Alimentary tract and metabolism drugs
    1. A02 Drugs for acid related disorders
      1. A02B Drugs for peptic ulcer and gastro-oesophageal reflux disease (GORD)
        1. A02BC Proton pump inhibitors for peptic ulcer and GORD
          1. A02BC01 Omeprazole
Company CHEPLAPHARM ARZNEIMITTEL GMBH
Current status Cancelled Post Market
Current status date October 31, 2021

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.