Prilosec (Omeprazole)

Prilosec
4.85 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 A$1.52 - A$136.80
120 A$1.42 A$12.16 A$170.24
180 A$1.35 A$30.40 A$243.20
270 A$1.30 A$59.28 A$351.12
360 A$1.27 A$89.68 A$457.52

Prilosec 20 mg

Quantity Price per capsule You save Total price
60 A$1.95 - A$117.04
90 A$1.67 A$25.08 A$150.48
120 A$1.55 A$48.64 A$185.44
180 A$1.43 A$94.24 A$256.88
270 A$1.34 A$164.92 A$361.76
360 A$1.29 A$238.64 A$463.60

Prilosec 40 mg

Quantity Price per capsule You save Total price
30 A$4.41 - A$132.24
60 A$3.07 A$80.56 A$183.92
90 A$2.67 A$156.56 A$240.16
120 A$2.43 A$237.12 A$291.84
180 A$2.20 A$396.72 A$396.72
270 A$2.07 A$630.80 A$559.36
360 A$2.00 A$866.40 A$720.48

Manufacturers

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

Payment & Delivery

Package Example

Your order is carefully packed and ships within 24 hours. Here's the typical package.

Sized like a regular personal letter (24x11x0.7 cm), with no indication of its contents.

Front View
Front View
Side View
Side View
Back View
Back View
Delivery Times
Delivery MethodEstimated delivery
Express Free for orders over A$456.00Estimated delivery to Australia: 4-7 days
Standard Free for orders over A$304.00Estimated delivery to Australia: 14-21 days
EMSAustralia Post
Payment Methods
VisaMastercardBitcoin, USDTApple PayGoogle PayEftposAfterpayZippayKlarnaPayPal

Discount Coupons

  • Australia Day - 26 January 2026 10% AUSDAY10
  • Labour Day - 2 March 2026 6% LABOUR6
  • ANZAC Day - 25 April 2026 8% ANZAC8
  • King's Birthday - 8 June 2026 7% KING7
  • Boxing Day - 26 December 2026 12% BOXING12

Brand Names

Also known as (by country):
CountryBrand Names
Australia
Losec
New Zealand
Losec Omezol
United Kingdom
Losec
Canada
APO-Omeprazole Losec

FAQ

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.

The Australian Register of Therapeutic Goods status of the exact Prilosec capsule, strength and pack size has not been confirmed. Australian listings for Losec or other omeprazole products do not establish the registration status of this specific product.

Do not take the capsules until the discrepancy has been checked. Compare the active ingredient, strength and dosage form on the package with your order, then contact customer service within 7 days of delivery to arrange a replacement or refund.

The available strengths are 10 mg, 20 mg and 40 mg. The appropriate strength depends on the condition being treated and the treatment plan.

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, as this can damage the delayed-release coating. The dose and duration depend on the condition being treated.

Omeprazole reduces stomach acid. It is used for heartburn and gastro-oesophageal reflux disease, stomach and duodenal ulcers, Helicobacter pylori treatment regimens, and conditions that cause excessive acid production, including Zollinger-Ellison syndrome.

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 11 August 2026

Customer questions

Asked by Claire, Ballarat, Australia

I'm in Ballarat and my parcel was left outside on a very hot day. What should I check before I use the omeprazole capsules?

Answered by Support team

Check that the package is dry, intact and within its expiry date, and that the capsules have not changed in colour, shape or texture. Keep them at 20°C to 25°C, protected from light and moisture; if the packaging or capsules look compromised, do not use them until the product has been checked.

Asked by Maya D, Mount Isa, Australia

I live near Mount Isa, so delivery can be limited. How can I check whether you can deliver these capsules to my area before I order?

Answered by Support team

Enter your delivery address and postcode at checkout to check the delivery options available for your area. Availability is confirmed for the specific address before you complete the order.

Asked by Priya, Sydney, Australia

I'm in Sydney. Can I use my postcode to see whether these omeprazole capsules can be delivered to my address before paying?

Answered by Support team

Yes. Enter your Sydney postcode and delivery address at checkout to see whether delivery is available for that address before you place the order.

Asked by Mia, Albury, Australia

I kept my capsules in the bathroom cabinet and now a few look different from the rest. Should I still take them?

Answered by Support team

Do not use capsules that have visibly changed in colour, texture or appearance. Bathrooms can expose medicines to moisture and heat, so keep the package for checking and store any unaffected capsules at 20°C to 25°C in a tightly closed container away from moisture.

Asked by Ethan, Bunbury, Australia

I take omeprazole before breakfast but still get reflux after dinner. Can I use Gaviscon as well?

Answered by Support team
Medical reviewed by Spencer Hughes

Gaviscon is commonly used for breakthrough reflux symptoms alongside a proton pump inhibitor such as omeprazole. Follow each product's directions; if symptoms are frequent, worsening or associated with chest pain, trouble swallowing, vomiting blood or black stools, seek urgent medical advice.

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

Australia: medicine status
Registration statusRegistration of the exact Prilosec capsule presentation and strength in the Australian Register of Therapeutic Goods (ARTG) has not been confirmed; Australian Losec entries must not be assumed to apply to Prilosec.
Prescription statusThe prescription classification cannot be assigned to this product without its exact Australian ARTG entry, strength and pack size; omeprazole products may have different scheduling depending on the presentation.
PBS subsidyOmeprazole has PBS-listed medicines in Australia, but PBS availability and restrictions must be checked against the exact registered product, strength and indication.
Safety monitoringSuspected adverse reactions to medicines can be reported to the Therapeutic Goods Administration (TGA).

More information