Stomach & gut
Proton pump inhibitor
Omeprazole
Also known as: Prilosec, Losec
Best time
30–60 min before breakfast
- 06:00–08:00
Works best taken before the first meal, when the stomach switches on its acid pumps.
Strong evidence
Consistent clinical trials or official prescribing guidance support this timing.
Why this time works
PPIs only block proton pumps that are actively secreting acid. Pumps activate when you eat, so taking omeprazole 30–60 minutes before breakfast means the drug is in the blood just as the most pumps switch on after the overnight fast.
Body rhythm involved
Acid pumps activate with meals; the most are recruited at the first meal of the day.