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Prilosec vs. Prevacid: Know the Difference

Shumaila Saeed
By Shumaila Saeed || Published on February 29, 2024
Prilosec (omeprazole) and Prevacid (lansoprazole) are proton pump inhibitors for treating acid reflux, differing mainly in their chemical composition and dosing frequency.
Prilosec vs. Prevacid

Key Differences

Prilosec, whose generic name is omeprazole, is a medication used to treat gastroesophageal reflux disease (GERD) and other conditions caused by excess stomach acid. Prevacid, also known as lansoprazole, serves a similar purpose but differs slightly in its chemical structure.
Shumaila Saeed
Shumaila Saeed
Feb 29, 2024
Both Prilosec and Prevacid work by reducing the amount of acid produced in the stomach, but they may vary in their effectiveness and the speed at which they act. Prilosec is often taken once a day, while Prevacid might be prescribed in different dosing frequencies.
Shumaila Saeed
Shumaila Saeed
Feb 29, 2024
The side effects of Prilosec can include headaches, nausea, and dizziness, which are similar to those of Prevacid; however, the incidence and intensity of these side effects can vary between the two medications.
Shumaila Saeed
Shumaila Saeed
Feb 29, 2024
Prilosec has been available for a longer time and has a more established track record, whereas Prevacid, being newer, may offer different benefits in terms of efficacy and tolerability for some patients.
Shumaila Saeed
Shumaila Saeed
Feb 29, 2024
In terms of prescription and over-the-counter availability, both Prilosec and Prevacid are widely accessible, but the choice between them often depends on individual patient needs, doctor's recommendation, and response to the medication.
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Shumaila Saeed
Feb 29, 2024
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Comparison Chart

Generic Name

Omeprazole
Lansoprazole
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Shumaila Saeed
Feb 29, 2024

Used for

GERD, excess stomach acid
GERD, excess stomach acid
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Feb 29, 2024

Chemical Structure

Different chemical composition
Different chemical composition
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Shumaila Saeed
Feb 29, 2024

Dosing Frequency

Often once daily
May vary, including once daily
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Shumaila Saeed
Feb 29, 2024

Side Effects

Headaches, nausea, dizziness (vary by individual)
Similar side effects, but may vary in intensity
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Shumaila Saeed
Feb 29, 2024
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Prilosec and Prevacid Definitions

Prilosec

Prilosec, a proton pump inhibitor for stomach-related ailments.
She takes Prilosec daily to prevent gastric ulcers.
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Shumaila Saeed
Jan 20, 2024

Prevacid

A lansoprazole-based medication for acid-related disorders.
Prevacid is part of his treatment plan for peptic ulcers.
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Shumaila Saeed
Jan 20, 2024

Prilosec

A medicine to decrease acid production in the stomach.
Prilosec is recommended for short-term treatment of stomach ulcers.
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Shumaila Saeed
Jan 20, 2024

Prevacid

Prevacid is a drug for treating excess stomach acid.
After starting Prevacid, her symptoms of acid reflux reduced.
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Shumaila Saeed
Jan 20, 2024

Prilosec

Prilosec is a medication for reducing stomach acid.
The doctor prescribed Prilosec to manage her acid reflux.
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Shumaila Saeed
Jan 20, 2024
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Prevacid

A pharmaceutical used to lower stomach acid production.
Prevacid has been effective in treating his GERD symptoms.
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Shumaila Saeed
Jan 20, 2024

Prilosec

An omeprazole-based drug used in treating GERD.
Prilosec has effectively controlled his heartburn symptoms.
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Shumaila Saeed
Jan 20, 2024

Prevacid

Prevacid, a proton pump inhibitor, manages gastric acid secretion.
She uses Prevacid to control her chronic gastritis.
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Shumaila Saeed
Jan 20, 2024

Prilosec

Prilosec, used for treating conditions like esophagitis.
His esophagitis improved significantly after starting Prilosec.
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Shumaila Saeed
Jan 20, 2024

Prevacid

Prevacid, prescribed for conditions such as Zollinger-Ellison syndrome.
The doctor prescribed Prevacid for his Zollinger-Ellison syndrome.
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Shumaila Saeed
Jan 20, 2024

Prilosec

Antacid (trade name Prilosec) that suppresses acid secretion in the stomach
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Jan 16, 2024

Prevacid

Antacid (trade name Prevacid) that suppresses acid secretion in the stomach
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Repeatedly Asked Queries

Can I take Prilosec and Prevacid together?

It's not typical to take them together; consult a doctor for advice.
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Shumaila Saeed
Feb 29, 2024

What are common side effects of Prilosec?

Common side effects include headaches, nausea, and dizziness.
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Shumaila Saeed
Feb 29, 2024

What is Prilosec used for?

Prilosec is used to treat GERD and excess stomach acid.
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Shumaila Saeed
Feb 29, 2024

Can Prevacid be bought without a prescription?

Yes, Prevacid is available over the counter and by prescription.
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Feb 29, 2024

What is Prevacid used for?

Prevacid is also used for treating GERD and excess stomach acid.
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Shumaila Saeed
Feb 29, 2024

Are Prilosec and Prevacid the same?

No, they are different medications, though both are proton pump inhibitors.
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Shumaila Saeed
Feb 29, 2024

Is Prilosec available over the counter?

Yes, Prilosec is available both over the counter and by prescription.
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Shumaila Saeed
Feb 29, 2024

Can I take Prevacid for a long period?

Long-term use should be under medical supervision due to potential risks.
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Feb 29, 2024

Does Prilosec interact with other medications?

Yes, Prilosec can interact with certain drugs; inform your doctor about all medications you're taking.
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Feb 29, 2024

Are there drug interactions with Prevacid?

Yes, like Prilosec, Prevacid can interact with other medications.
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Feb 29, 2024

How quickly does Prilosec work?

Prilosec typically starts working within one to two hours of ingestion.
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Feb 29, 2024

Is Prevacid suitable for children?

Yes, but only under a doctor's recommendation and supervision.
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Shumaila Saeed
Feb 29, 2024

What are common side effects of Prevacid?

Similar to Prilosec, including headaches, nausea, and dizziness.
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Shumaila Saeed
Feb 29, 2024

Is Prilosec safe for long-term use?

Long-term use can have risks; it's best to consult a healthcare provider.
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Shumaila Saeed
Feb 29, 2024

How fast does Prevacid provide relief?

Prevacid usually starts working within one to two hours as well.
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Feb 29, 2024

Is Prevacid safe during pregnancy?

It's important to seek medical advice before taking Prevacid during pregnancy.
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Shumaila Saeed
Feb 29, 2024

Does Prilosec cause dependency?

There's no evidence of dependency, but rebound acid hypersecretion can occur.
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Shumaila Saeed
Feb 29, 2024

Can pregnant women take Prilosec?

Consult a doctor as it depends on individual health conditions.
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Shumaila Saeed
Feb 29, 2024

Can children take Prilosec?

Prilosec can be prescribed to children under medical supervision.
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Feb 29, 2024

Can stopping Prevacid suddenly cause problems?

Sudden cessation might lead to rebound acid production; taper off under a doctor's guidance.
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Shumaila Saeed
Feb 29, 2024

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About Author
Shumaila Saeed
Written by
Shumaila Saeed
Shumaila Saeed, an expert content creator with 6 years of experience, specializes in distilling complex topics into easily digestible comparisons, shining a light on the nuances that both inform and educate readers with clarity and accuracy.

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