Complete Guide to Omeprazole Side Effects
Common Side Effects of Omeprazole
Most people who take omeprazole experience few or no side effects. When they do occur, common side effects typically affect up to 1 in 10 people and may include headache, dizziness, nausea, vomiting, stomach pain, diarrhoea, constipation, and wind. These effects are usually mild and often improve as your body adjusts to the medication. If you experience persistent headaches whilst taking omeprazole, this is amongst the most frequently reported side effects and may be related to changes in stomach acid levels.
Long-Term Use Considerations
Extended use of omeprazole, particularly for more than 12 months, may lead to additional considerations. Reduced stomach acid can affect the absorption of certain nutrients including vitamin B12, magnesium, and iron. Some studies suggest a potential increased risk of bone fractures with prolonged PPI use, particularly in older adults or those taking high doses. Your prescriber will regularly review long-term omeprazole therapy to ensure the benefits continue to outweigh potential risks.
Rare but Serious Side Effects
Although uncommon, some serious side effects require immediate medical attention. These include severe skin reactions such as Stevens-Johnson syndrome, kidney problems, severe diarrhoea that may indicate Clostridioides difficile infection, and symptoms of low magnesium including muscle cramps, irregular heartbeat, or seizures. Liver problems, whilst rare, can manifest as yellowing of skin or eyes, dark urine, or severe fatigue.
Managing and Minimising Side Effects
If you experience side effects from omeprazole, discuss with your prescriber before stopping treatment abruptly. They may adjust your dose, suggest taking the medication at a different time, or recommend an alternative PPI such as lansoprazole or pantoprazole. At EverydayMeds, our online consultation process allows you to report any side effects and receive personalised advice from qualified healthcare professionals.
Getting Omeprazole Through EverydayMeds
EverydayMeds offers convenient access to omeprazole 20mg capsules and branded Losec MUPS through our secure online consultation service. Our qualified prescribers assess your symptoms, medical history, and current medications to ensure omeprazole is suitable for you. We also stock alternative acid reflux treatments including lansoprazole, pantoprazole, and esomeprazole if omeprazole isn't appropriate for your needs.










