Active ingredient: Omeprazole

Rating: 3.3 - 3 review(s)
How often in a day do you take medicine? How many times?

Omeprazole uses

Pharmacological action

omeprazole is an inhibitor of H+ K+ ATPase. This medication inhibits the activity of H+-K+-ATPase in gastric parietal cells and thus blocks the final stage of hydrochloric acid secretion. This leads to a reduction in basal and stimulated secretion, regardless of the nature of the stimulus. Due to the reduction of acid secretion omeprazole reduces or normalizes the effects of acid in the esophagus in patients with reflux esophagitis.

omeprazole has a bactericidal effect on Helicobacter pylori. Eradication of H. pylori when omeprazole used with antibiotics allows to quickly arrest the symptoms, to take a high degree of healing of damaged mucosa and persistent long-term remission and reduce the likelihood of bleeding from the gastrointestinal tract.


After oral administration omeprazole is rapidly absorbed from the gastrointestinal tract. This drug penetrates the parietal cells of gastric mucosa. Plasma protein binding is about 95%. omeprazole is biotransformed in the liver. Excreted by the kidneys - 72-80%, in the faeces - about 20%. T1/2 is 0.5-1 h. In patients with chronic liver diseases T1/2 increases up to 3 hours.

Why is omeprazole prescribed?

Gastric ulcer and duodenal ulcer in acute phase (including associated with Helicobacter pylori), reflux esophagitis, Zollinger-Ellison syndrome, erosive and ulcerative lesions of gastric and duodenal ulcers associated with taking NSAIDs.

Dosage and administration

The dosing regimen of omeprazole is individual. When this medication is administered orally of the single dose is 20-40 mg. The daily dose is 20-80 mg, the frequency of use is 1-2 times / day. The duration of treatment is 2-8 weeks.

omeprazole side effects, adverse reactions

Digestive system: rarely - nausea, diarrhea, constipation, abdominal pain, flatulence.

CNS: rarely - headache, dizziness, weakness.

Hemopoietic system: in some cases - anemia, eosinopenia, neutropenia, thrombocytopenia.

Urinary system: in some cases - hematuria, proteinuria.

Musculoskeletal system: in some cases - arthralgia, muscle weakness, myalgia.

Allergic reactions: rarely - skin rash.


omeprazole contraindications

Chronic liver disease, hypersensitivity to omeprazole.

Using during pregnancy and breastfeeding

In the absence of clinical experience with omeprazole it is not recommended to use this drug during pregnancy. If necessary to use during omeprazole lactation it should been solve the issue of termination of breastfeeding.

Category effects on the fetus by FDA - C.

Special instructions

Before the treatment with omeprazole it is necessary to exclude the possibility of a malignant process because omeprazole treatment can mask symptoms and delay the correct diagnosis.

Therapy with omeprazole may affects results of laboratory studies of liver and gastrin concentrations in blood plasma.

Due to lack of experience in clinical application of omeprazole this medicine is not recommended for children.

omeprazole drug interactions

This medication alters the bioavailability of any drug, absorption depends on pH (ketoconazole, iron salts, etc.). omeprazole slows down the elimination of drugs metabolized in the liver by microsomal oxidation (warfarin, diazepam, phenytoin, etc.).

omeprazole enhances the action of coumarin and diphenine, does not change - NSAIDs. This drug increases (relative) the concentration of clarithromycin in the blood; may increases the leukopenic and thrombocytopenic effects of depressants hematopoiesis drugs. Substance for intravenous infusion is compatible only with saline and dextrose (using other solvents may decrease the stability of omeprazole due to changes in pH of infusion medium).

omeprazole in case of emergency / overdose

Symptoms: dry mouth, nausea, blurred vision, headache, increased sweating, flushing, tachycardia, drowsiness, confusion.

Treatment: symptomatic, dialysis is ineffective.


Omeprazole available forms, composition, doses:

Apo-Omeprazole 20 mg Capsule/Sustained Release Tablet1.15 USD
CVS Pharmacy omeprazole dr 20 mg tablet0.53 USD
Capsules, Delayed Release; Oral; Omeprazole 10 mg
Capsules, Delayed Release; Oral; Omeprazole 20 mg
Capsules, Delayed Release; Oral; Omeprazole 40 mg
Capsules, Delayed Release; Oral; Omeprazole Magnesium 10 mg
Capsules, Delayed Release; Oral; Omeprazole Magnesium 20 mg
Capsules, Delayed Release; Oral; Omeprazole Magnesium 40 mg
Capsules, Gastro-Resistant; Oral; Omeprazole 10 mg
Capsules, Gastro-Resistant; Oral; Omeprazole 20 mg
Capsules; Oral; Omeprazole 10 mg
Capsules; Oral; Omeprazole 20 mg
Capsules; Oral; Omeprazole 40 mg
Losec (Sustained-Release Capsule) 20 mg Capsule/Sustained Release Tablet1.24 USD
Losec (Sustained-Release Tablet) 10 mg Capsule/Sustained Release Tablet1.97 USD
Losec (Sustained-Release Tablet) 20 mg Capsule/Sustained Release Tablet2.48 USD
Mylan-Omeprazole 10 mg Capsule/Sustained Release Tablet0.86 USD
Mylan-Omeprazole 20 mg Capsule/Sustained Release Tablet1.15 USD
Omeprazole 10 mg Delayed Release Capsule3.13 USD
Omeprazole 20 mg Delayed Release Capsule4.32 USD
Omeprazole 28 20 mg Enteric Coated Tabs Box25.99 USD
Omeprazole 40 mg Delayed Release Capsule7.69 USD
Omeprazole dr 20 mg tablet0.66 USD
Omeprazole powder5.05 USD
Pms-Omeprazole (Delayed Release Tablet) 20 mg Capsule/Sustained Release Tablet1.15 USD
Pms-Omeprazole (Sustained-Release Capsule) 20 mg Capsule/Sustained Release Tablet1.15 USD
PriLOSEC 30 10 mg Delayed Release Capsule Bottle174.37 USD
PriLOSEC 30 20 mg Delayed Release Capsule Bottle459.99 USD
PriLOSEC 40 mg Delayed Release Capsule9.59 USD
PriLOSEC OTC 14 20 mg Enteric Coated Tabs Box19.99 USD
Prilosec 20 mg capsule dr6.15 USD
Prilosec dr 10 mg capsule5.59 USD
Prilosec dr 20 mg capsule6.24 USD
Prilosec dr 40 mg capsule9.22 USD
Prilosec otc 20 mg tablet0.76 USD
Ratio-Omeprazole (Sustained-Release Tablet) 20 mg Capsule/Sustained Release Tablet1.15 USD
Sandoz Omeprazole (Sustained-Release Capsule) 10 mg Capsule/Sustained Release Tablet0.86 USD
Sandoz Omeprazole (Sustained-Release Capsule) 20 mg Capsule/Sustained Release Tablet1.15 USD
Tablets, Delayed Release; Oral; Omeprazole 20 mg
Zegerid 20 mg capsule7.19 USD
Zegerid 30 20-1680 mg Packets Packet224.27 USD
Zegerid 30 40-1680 mg Packets Packet224.27 USD
Zegerid 40 mg capsule6.46 USD
Zegerid 40-1100 mg capsule7.48 USD
Zegerid otc 20-1100 mg capsule0.78 USD

Indications and Usages:

ATC codes:

ICD-10 codes:

Omeprazole destination | category:


Drugs with same active ingredients (Pharmaceutical companies):


  2. Dailymed."OMEPRAZOLE MAGNESIUM: DailyMed provides trustworthy information about marketed drugs in the United States. DailyMed is the official provider of FDA label information (package inserts).". (accessed August 28, 2018).
  3. "omeprazole". (accessed August 28, 2018).

Frequently asked Questions

Can i drive or operate heavy machine after consuming Omeprazole?

Depending on the reaction of the Omeprazole after taken, if you are feeling dizziness, drowsiness or any weakness as a reaction on your body, Then consider Omeprazole not safe to drive or operate heavy machine after consumption. Meaning that, do not drive or operate heavy duty machines after taking the capsule if the capsule has a strange reaction on your body like dizziness, drowsiness. As prescribed by a pharmacist, it is dangerous to take alcohol while taking medicines as it exposed patients to drowsiness and health risk. Please take note of such effect most especially when taking Primosa capsule. It's advisable to consult your doctor on time for a proper recommendation and medical consultations.

Is Omeprazole addictive or habit forming?

Medicines are not designed with the mind of creating an addiction or abuse on the health of the users. Addictive Medicine is categorically called Controlled substances by the government. For instance, Schedule H or X in India and schedule II-V in the US are controlled substances.

Please consult the medicine instruction manual on how to use and ensure it is not a controlled substance.In conclusion, self medication is a killer to your health. Consult your doctor for a proper prescription, recommendation, and guidiance.


Review conducted a study on Omeprazole, and the result of the survey is set out below. It is noteworthy that the product of the survey is based on the perception and impressions of the visitors of the website as well as the views of Omeprazole consumers. We, as a result of this, advice that you do not base your therapeutic or medical decisions on this result, but rather consult your certified medical experts for their recommendations.

Visitor reports

One visitor reported useful

How is the drug Omeprazole useful in reducing or relieving the symptoms? How useful is it?
According to the survey conducted by the website, there are variable results and below are the percentages of the users that say the medicine is useful to them and that say it is not helping them much. It is not ideal to continue taking the medication if you feel it is not helping you much. Contact your healthcare provider to check if there is a need to change the medicine or if there is a need to re-evaluate your condition. The usefulness of the medicine may vary from patient to patient, depending on the other diseases he is suffering from and slightly depends on the brand name.

One visitor reported side effects

Did you get side effects while taking the Omeprazole drug, or were there no side effects?
According to the survey conducted by website users, the below-mentioned percentages indicate the number of people experiencing the side effects and the number of people not experiencing the side effects when taking Omeprazole medicine. Every drug produces minimal side effects, and they are negligible most times, when compared to the desired effect [use] of the medicine. Side effects depend on the dose you are taking, any drug interactions that happen when you are on other medications, if the patient is sensitive, and other associated conditions. If you cannot tolerate the side effects, consult your doctor immediately, so he can either adjust the dose or change the medication.
It has side effects1

One visitor reported price estimates

What is your opinion about drug cost? Did you feel the cost is apt, or did you feel it is expensive?
The report given by the website users shows the following figures about several people who felt the medicine Omeprazole is expensive, and the medicine is not expensive. The results are mixed. The perception of the cost of the medicine to be expensive or not depends on the brand name of the medicine, country, and place where it is sold, and the affordability of the patient. You can choose a generic drug in the place of the branded drug to save the cost. The efficiency of the medicine will not vary if it is generic or a branded one.
Not expensive1

Two visitors reported frequency of use

How often in a day do you take the medicine?
Are you taking the Omeprazole drug as prescribed by the doctor?

Few medications can be taken Twice in a day more than prescribed when the doctor's advice mentions the medicine can be taken according to frequency or severity of symptoms. Most times, be very careful and clear about the number of times you are taking the medication. The report of website users about the frequency of taking the drug Omeprazole is mentioned below.
Twice in a day1
Once in a day1

Five visitors reported doses

What is the dose of Omeprazole drug you are taking?
According to the survey conducted among website users, the maximum number of people are using the following dose 11-50mg. Few medications come in only one or two doses. Few are specific for adult dose and child dose. The dose of the medicine given to the patient depends on the severity of the symptom/disease. There can be dose adjustments made by the doctor, based on the progression of the disease. Follow-up is important.

Two visitors reported time for results

What is the time duration Omeprazole drug must be taken for it to be effective or for it to reduce the symptoms?
Most chronic conditions need at least some time so the dose and the drug action gets adjusted to the body to get the desired effect. The stastistics say website users needed 5 days to notice the result from using Omeprazole drug. The time needed to show improvement in health condition after using the medicine Omeprazole need not be same for all the users. It varies based on other factors.
5 days1
1 week1

Four visitors reported administration

The drugs are administered in various routes, like oral or injection form. They are administered before food or after food. How are you taking Omeprazole drug, before food or after food?
Click here to find out how other users of our website are taking it. For any doubts or queries on how and when the medicine is administered, contact your health care provider immediately.
Empty stomach2
After food1
With a meal1

Eight visitors reported age

> 601

Visitor reviews

There are no reviews yet. Be the first to write one!

Your name: 
Spam protection:  < Type 22 here

The information was verified by Dr. Rachana Salvi, MD Pharmacology

© 2002 - 2023 "". All Rights Reserved