Prilosec (Omeprazole)

Prilosec
4.86 ratingsReviews
Generic:
Omeprazole
Indications:
gastroesophageal reflux disease heartburn ulcers Zollinger-Ellison syndrome
Analogs:
Nexium
AdultsPregnancyAllergiesDiabetesBreastfeedingChildrenDriving

Dosages

Prilosec 10 mg

Quantity Price per capsule You save Total price
90 C$1.40 - C$126.00
120 C$1.31 C$11.20 C$156.80
180 C$1.24 C$28.00 C$224.00
270 C$1.20 C$54.60 C$323.40
360 C$1.17 C$82.60 C$421.40

Prilosec 20 mg

Quantity Price per capsule You save Total price
60 C$1.80 - C$107.80
90 C$1.54 C$23.10 C$138.60
120 C$1.42 C$44.80 C$170.80
180 C$1.31 C$86.80 C$236.60
270 C$1.23 C$151.90 C$333.20
360 C$1.19 C$219.80 C$427.00

Prilosec 40 mg

Quantity Price per capsule You save Total price
30 C$4.06 - C$121.80
60 C$2.82 C$74.20 C$169.40
90 C$2.46 C$144.20 C$221.20
120 C$2.24 C$218.40 C$268.80
180 C$2.03 C$365.40 C$365.40
270 C$1.91 C$581.00 C$515.20
360 C$1.84 C$798.00 C$663.60

Manufacturers

ApotexAstraZenecaDr. Reddy's Laboratories Ltd.HexalLaboratorios CinfaMalesci Istituto FarmacobiologicoRanbaxy Laboratories Ltd.ratiopharm

Payment & Shipping

Package Example

Your order is securely packed and usually ships within 24 hours. Here is what a typical parcel looks like.

It is about the size of a regular letter (24x11x0.7 cm) and does not show any details of what is inside.

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Shipping Times
Shipping MethodEstimated delivery
Express Free for orders over C$420.00Estimated delivery to Canada: 4-7 days
Standard Free for orders over C$280.00Estimated delivery to Canada: 14-21 days
EMSCanada Post
Payment Methods
VisaMastercardAmerican ExpressBitcoin, USDTInteracApple PayGoogle PayPayPal

Discount Coupons

  • Victoria Day - May 18, 2026 8% VICTORIA8
  • Canada Day - July 1, 2026 10% CANADADAY10
  • Labour Day - September 7, 2026 6% LABOUR6
  • Thanksgiving (Canada) - October 12, 2026 9% THANKS9
  • Boxing Day - December 26, 2026 12% BOXING12

Brand Names

Also known as (by country):
CountryBrand Names
Canada
APO-Omeprazole Losec
United Kingdom
Losec
France
Mopral
Australia
Losec
New Zealand
Losec Omezol
Germany
OMEP Omeprazol ratiopharm
Italy
Antra Mepral
Belgium
Docomepra Logastric Losec Omepratop Sedacid

FAQ

Do not use a capsule if its blister is torn, punctured, open, or otherwise unable to protect it from moisture and light. Keep the package and arrange to have the damaged product checked or replaced.

They may differ. This product contains omeprazole as the active ingredient, but inactive ingredients can vary by manufacturer and capsule formulation. Check the ingredient list on the received package before use if you need to avoid a particular excipient, dye, lactose, or other ingredient.

A different appearance alone does not show that the product is incorrect. Compare the package label for omeprazole, the prescribed or selected strength, delayed-release capsule form, manufacturer, lot number, expiry date, and capsule imprint when present. Do not take it until any mismatch in ingredient, strength, dosage form, seal, or condition has been resolved.

Store the capsules at 20°C to 25°C in a tightly closed container, protected from light and moisture. Keep them in their labelled packaging and out of reach of children.

Omeprazole is a proton pump inhibitor used for acid-related conditions, including heartburn and gastroesophageal reflux disease (GERD), peptic ulcers, and disorders that cause excessive stomach acid, such as Zollinger-Ellison syndrome. It may also be part of combination treatment to eradicate Helicobacter pylori and help prevent recurrent duodenal ulcers.

Take the capsule by mouth before a meal, ideally 30 to 60 minutes beforehand. Swallow it whole with water; do not crush or chew it, because the delayed-release coating protects omeprazole from stomach acid. The strength, schedule, and treatment duration depend on the condition being treated.

Description

A proton pump inhibitor called Prilosec reduces the quantity of acid the stomach produces. Prilosec is used to treat problems brought on by an excess of stomach acid, such as symptoms of gastroesophageal reflux disease (GERD). Additionally, omeprazole, the active ingredient of Prilosec, is used to aid in the recovery of erosive esophagitis, which is an acid reflux disease that damages the esophagus.

When treating a gastrointestinal ulcer brought on by a Helicobacter pylori infection, Prilosec may also be administered in addition to antibiotics.

Over-the-counter Prilosec can manage heartburn that happens two or more days a week. Prilosec OTC is to be taken as a regimen for a consecutive 14 days.

How Does It Work?

Prilosec suppresses the stomach's production of hydrochloric acid by acting as an inhibitor of the "proton pump"-the mechanism that exchanges hydrogen ions. The mechanism of antisecretory activity is linked to the inhibition (suppression) of the gastric mucosa cell membranes' H-K-ATPase enzyme, which speeds up the exchange of hydrogen ions and blocks the last step of hydrochloric acid generation. Consequently, independent of the stimulus type, it lowers the basal (own) level and stimulates secretion (secretion of digestive juices).

Your doctor may prescribe this medication for different reasons. If you would like additional information on this medication, contact your doctor.

Even if you see improvements in your health, don't stop taking Prilosec earlier than your doctor has suggested. If you stop taking the drug too soon, it could make things worse. Until you know how this drug affects you, take caution when operating machinery, driving, climbing, or performing other risky actions. Avoid consuming alcohol.

Prilosec14tabs

Before Treatment 

Early signs of a heart attack can be confused with heartburn. If you feel dizzy or overheated and your chest pain radiates to your shoulder or jaw, get emergency medical attention.

Use of Prilosec is not advised in the following cases:

  • if you have an omeprazole allergy or if you have an allergy to medications that are similar to omeprazole, including Protonix, Nexium, Prevacid, Lansoprazole, Pantoprazole, and Rabeprazole; 
  • you've previously taken omeprazole and experienced respiratory issues, renal issues, or a severe allergic reaction; 
  • you use rilpivirine-containing HIV medications (Complia, Edurant, Odefsey, Juluca). 

Find out from a physician or pharmacist if using this medication is safe if you have the following: 

  • difficulty or pain during swallowing;
  • black or bloody stools, vomit that resembles coffee grounds or blood; 
  • heartburn persisting for more than three months; 
  • regular heartburn and wheezing, chest pain; 
  • rapid weight loss; 
  • nausea, vomiting, and abdominal pain;
  • hepatic illness; 
  • inadequate blood magnesium levels; 
  • decreased bone mineral density, often known as osteoporosis (osteopenia). 

When using a proton pump inhibitor for an extended period or more than once a day, you run the risk of breaking a bone in your hip, wrist, or spine. Consult your physician about maintaining the health of your bones. 

Proton pump inhibitor (PPI) acid-suppressing medications, including omeprazole, have been linked to a higher risk of stomach cancer, commonly known as gastric cancer when used long-term. Based on the findings of multiple observational studies, it is believed that PPIs, like omeprazole, are strong gastric acid suppressants that may raise the risk of gastric cancer by thinning the stomach lining, increasing the hormone gastrin levels, and encouraging the growth of bacteria in the stomach.

Consult a physician before using this medication if you are nursing a baby or pregnant.

How Should Prilosec Be Taken? 

Adhere strictly to the label's instructions or your doctor's prescription when using Prilosec. Read all drug guides or instruction sheets and abide by all guidelines on the label of your medicine.

If you are unable to take the entire contents, open the capsule and sprinkle the medication into a spoonful of applesauce. Immediately swallow the mixture. Don't keep it for later.

The powdered Prilosec needs to be dissolved in a tiny amount of water. This combination can be administered with a catheter-tipped syringe via a nasogastric (NG) feeding tube or by swallowing it. 

Take OTC Prilosec no more than 14 days in a row. It could take one to four days for your symptoms to get better. Before you begin a fresh 14-day round of treatment, give yourself at least 4 months. 

If your symptoms worsen or do not improve, call your doctor. 

Antibiotics and Prilosec are used in conjunction to treat certain illnesses. Take all prescriptions exactly as prescribed.

This medication may influence certain medical test results. Inform every medical professional you see that you take Prilosec. 

Prilosec42tabs

Adverse Effects of Prilosec

If you have any of the following symptoms of a Prilosec allergic reaction: hives, trouble breathing, or swelling in your face, lips, tongue, or throat, get emergency medical attention.

Call your doctor and cease taking Prilosec if you have: 

  • acute stomach ache, bloody or watery diarrhea; 
  • unexpected or fresh back, hip, thigh, or wrist pain; 
  • seizure (fits and fits); 
  • kidney problems: fever, rash, nausea, appetite loss, joint discomfort, decreased frequency of urination, blood in the urine, weight gain;
  • low magnesium - jitteriness, cramps, spasms in the muscles, feeling like you're choking, or experiencing dizziness;
  • joint pain and a skin rash on your face or arms that worsens in the sun are new or worsening signs of lupus.

Long-term Prilosec use may increase the risk of fundic gland polyps, which are growths in your stomach. Discuss this risk with your physician. 

Over three years of omeprazole use may result in vitamin B-12 insufficiency. If you have this illness, consult your physician about how to treat it. 

Typical Prilosec adverse effects could be: 

  • signs of a cold, including stuffy nose, sneezing, and sore throat (particularly in kids); 
  • fever, particularly in young people; 
  • gas and stomach ache; 
  • vomiting, diarrhea, and nausea; 
  • headache. 

Other adverse effects might also arise; this is not an exhaustive list. For medical advice regarding side effects, contact your physician. 

Which Other Medications Will Impact Prilosec?

There are situations when taking certain drugs with Prilosec is unsafe. Certain drugs can alter the blood levels of other medications you take, which could worsen side effects or reduce their efficacy. 

Inform your physician about every medication you are taking. Omeprazole interacts with several medications, particularly: 

  • digoxin;
  • clopidogrel;
  • methotrexate;
  • St John's Wort;
  • a "water pill" or diuretic;
  • an antibiotic (rifampin, clarithromycin, or amoxicillin). 

Numerous additional medications may interact with omeprazole; this list is not exhaustive. 

Medically reviewed by
John Buducci
Pharmacology expert
Updated August 11, 2026

Customer questions

Asked by Megan, Yellowknife, Canada

I live in Yellowknife and sometimes delivery options are limited here. How can I find out whether these omeprazole capsules can be shipped to my address?

Answered by Support team

Enter your full Yellowknife address and postal code during checkout to see whether shipping is available for your destination. Availability can vary by address, so it cannot be confirmed for every remote route in advance.

Asked by Daniel, Calgary, Canada

My capsules arrived in Calgary after sitting outside during very cold weather. What should I check before I take one?

Answered by Support team

Check that the outer package and capsule protection are intact, dry, and free of visible damage, then review the expiry date and label. Store the capsules at 20°C to 25°C once received; because the actual temperature and duration of exposure are unknown, do not use them if the package or capsules appear compromised.

Asked by Priya, Vancouver, Canada

I'm in Vancouver. Can I enter my postal code before paying to check whether the capsules can be shipped to me?

Answered by Support team

Yes. Enter your Vancouver postal code and delivery address during checkout to check the shipping options available for that destination.

Asked by Colin, Hamilton, Canada

I used Nexium before for reflux. Is this just the same medicine under a different name?

Answered by Support team

No. This product contains omeprazole, while Nexium contains esomeprazole; both are proton pump inhibitors, but they are different active ingredients. Do not take both together or switch based on the name alone without confirming the intended treatment plan with your prescriber or pharmacist.

Asked by Sarah, London (ON), Canada

I take atazanavir every day for HIV treatment and have started getting heartburn. Can I add omeprazole?

Answered by Support team
Medical reviewed by John Buducci

Omeprazole can substantially reduce atazanavir absorption and may make atazanavir less effective. Do not start omeprazole for this purpose without advice from the clinician managing your HIV treatment, who can recommend an appropriate alternative or plan.

Product specifications

Active ingredientOmeprazole
Drug classProton pump inhibitor
Dosage formDelayed-release capsule
Available strengths10 mg, 20 mg, 40 mg
RouteOral
StorageStore at 20°C to 25°C in a tightly closed container, protected from light and moisture.
ATC codeA02BC01

Regulatory information

More information