Esomeprazole: Uses, Side Effects, and How to Take It
Esomeprazole is a proton pump inhibitor that reduces the amount of acid made by the stomach. It is used to treat frequent heartburn, acid reflux, and inflammation or damage of the esophagus, including ulcers caused by acid.
Esomeprazole can help control acid-related symptoms when taken as directed. Use the lowest effective dose for the shortest time advised, and check with a doctor or pharmacist if you take other medicines.
Key facts at a glance
- ATC
- A02BC05
- Generic
- Esomeprazole
- Class
- proton-pump-inhibitor
- Brands
- Nexium
- Availability
- rx
- Pregnancy
- B
- Lactation
- caution
- Half-life (h)
- 1.5
- Onset (min)
- 60
- Duration (h)
- 72
- Routes
- oral, iv
- Forms
- capsule, injection
- Regions
- CN, US, EU, JP
- Monitoring
- magnesium, vitamin-b12
This page is for informational purposes only.
Do not use this information to diagnose yourself or to replace a physician's advice. Always consult a qualified healthcare provider before starting, stopping, or changing any medication. If you believe you are experiencing a medical emergency, call your local emergency number immediately.
Dosage and administration
- Usual dose
- 20-40mg once daily
- Maximum
- consult physician
- Frequency
- once daily
- Instructions
- Follow physician instructions
- Duration limits
- as prescribed
- Monitoring
- standard
- Usual dose
- 10-20mg once daily
- Maximum
- consult physician
- Frequency
- once daily
- Instructions
- Follow physician instructions
- Duration limits
- as prescribed
- Monitoring
- standard
- Usual dose
- 20mg once daily
- Maximum
- consult physician
- Frequency
- once daily
- Instructions
- Follow physician instructions
- Duration limits
- as prescribed
- Monitoring
- standard
Overdose information
Special Populations
9 groupspregnancy
first trimesteruse lowest effective dose
use only if clearly needed, avoid routine use
regular prenatal checkups
Use with caution and monitor for adverse effects.
pregnancy
third trimesteruse lowest effective dose
consider discontinuation near term due to potential effects on neonatal gastric acid secretion
fetal monitoring
Use with caution and monitor for adverse effects.
lactation
breastfeedingno adjustment needed
use lowest effective dose, consider timing of doses relative to breastfeeding
monitor infant for any unusual symptoms
Use with caution and monitor for adverse effects.
pediatric_age
infants 0 12 monthsnot recommended
not approved for use in infants under 1 year
not applicable
pediatric_age
children 1 11 yearsweight-based dosing
approved for treatment of GERD and erosive esophagitis in children
monitor growth and development with long-term use
geriatric
elderly 65 years and olderno dose adjustment required for mild to moderate impairment
use standard dosing, monitor renal function
periodic renal function assessment
renal_impairment
mild to moderateno dose adjustment required
standard dosing appropriate
routine monitoring
hepatic_impairment
mild to moderateno dose adjustment for mild to moderate impairment
standard dosing, monitor for symptom improvement
assess liver function periodically
Use with caution and monitor for adverse effects.
hepatic_impairment
severereduce dose to 20mg once daily
use reduced dose and monitor closely
regular liver function monitoring
Use with caution and monitor for adverse effects.
Statistics and clinical data
FDA approval year
FDA approval date for Esomeprazole (Nexium)
Drug class
Pharmacological classification of Esomeprazole
Common uses
Primary therapeutic indications for Esomeprazole
Mechanism of action
Pharmacodynamic mechanism of Esomeprazole
Contraindications
Conditions and patient states where this medication should be avoided or used with caution.
Do not use (1)
Known allergy to this medication or its components
Use caution (1)
Consult healthcare provider for benefits vs risks assessment
Official drug label
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This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed July 22, 2026. · Read our editorial policy