Losec洛赛克
Omeprazole · 20 mg · capsule
Losec details
- Active ingredient
- Omeprazole
- Strength
- 20 mg
- Form
- capsule
- Drug class
- Proton pump inhibitor
- Manufacturer
- AstraZeneca China
- Registered in
- China
How does Losec work?
Shuts down the acid pumps in the stomach lining, cutting acid production at the source. This lets an inflamed oesophagus or an ulcer heal, rather than simply neutralising acid that has already been produced.
How to take Losec
Best taken 30-60 minutes before the first meal of the day, when the acid pumps are most active. Swallow capsules whole. Full benefit often takes a few days.
Always follow the dose printed on your pack or given by your prescriber — it can differ from the general guidance above.
Common side effects
- • Headache
- • Diarrhoea or constipation
- • Nausea or wind
- • Abdominal pain
Seek medical advice
- • Severe or persistent diarrhoea (possible C. difficile infection)
- • Signs of low magnesium — muscle cramps, tremor, irregular heartbeat
- • Unexplained weight loss, difficulty swallowing or vomiting blood
Who should be careful with Losec?
- •Long-term use is associated with lower vitamin B12 and magnesium, and a small increase in fracture risk — review the need periodically
- •Liver disease
- •May mask the symptoms of stomach cancer — persistent symptoms need investigating
Losec interactions
- •Clopidogrel — some PPIs reduce its antiplatelet effect
- •Medicines needing stomach acid to absorb, such as ketoconazole and some HIV drugs
- •Methotrexate at high doses
This is not a complete list. Tell your pharmacist about every medicine and supplement you take.
Frequently asked questions about Losec
What is Losec used for?
Losec contains Omeprazole, a Proton pump inhibitor. Check the package insert for the approved indications in China.
How does Losec work?
Shuts down the acid pumps in the stomach lining, cutting acid production at the source. This lets an inflamed oesophagus or an ulcer heal, rather than simply neutralising acid that has already been produced.
How should I take Losec?
Best taken 30-60 minutes before the first meal of the day, when the acid pumps are most active. Swallow capsules whole. Full benefit often takes a few days. Always follow the dose on your pack or from your prescriber.
What are the side effects of Losec?
Common: Headache, Diarrhoea or constipation, Nausea or wind, Abdominal pain. Seek medical advice for: Severe or persistent diarrhoea (possible C. difficile infection); Signs of low magnesium — muscle cramps, tremor, irregular heartbeat; Unexplained weight loss, difficulty swallowing or vomiting blood.
Is Losec available over the counter in China?
Losec is normally supplied on prescription in China. Speak to a doctor or pharmacist.
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