Summary. Dizziness is found among people who take Omeprazole, especially for people who are female, 60+ old , have been taking the drug for 1 month, also take medication Aspirin, and have High blood pressure. Omeprazole is in a class of drugs known as proton pump inhibitors that decrease stomach acid. Known as Prilosec in its over-the-counter form, omeprazole is prescribed for acid reflux disease, heartburn and stomach ulcers. Omeprazole and dizziness. Common Questions and Answers about Omeprazole and dizziness. prilosec. Is it possible for this to be a side effect from Omeprazole? And how long does it take to get out of your system? I have heard it could take 3 months and I have heard it won't take longer than a week?? Read More. It does appear to be an anxiety reaction and is not uncommon, There are some things. Yes, omeprazole can cause dizziness as well as headaches. If you find that you cannot tolerate this side effect, ask your doctor if he/she could prescribe something else. Hope this helps. If you find that you cannot tolerate this side effect, ask your doctor if he/she could prescribe something else. I do indeed have dizziness, but I believe that another factor is involved, my long term use of Dilantin, which has been known to cause atrophy of the cerebellum, which (the atrophy) is known to cause dizziness. But why does it happen? Read about these 7 possible causes of dizziness so you can learn how to treat it. Read about these 7 possible causes of dizziness so you can learn how to treat it. Skip to. In clinical trials using either dual therapy with PRILOSEC and clarithromycin, or triple therapy with PRILOSEC, clarithromycin, and amoxicillin, no adverse reactions unique to these drug combinations were observed. Adverse reactions observed were limited to those previously reported with omeprazole, clarithromycin, or amoxicillin alone. Omeprazole (Prilosec, Zegerid) is a commonly used medicine for problems associated with stomach acid, such as heartburn, acid reflux and digestive system ulcers. It is available by prescription and over the counter. Omeprazole has been taken by many people worldwide and is usually well tolerated. It can, however, cause a variety of side effects, most commonly affecting the digestive and. I have been taking Omeprazole since December 2007 now so 2 and a half months. I had the dose increased to 40mg 3 weeks ago as 20mg wasn't curing the burning in my throat. Summary. Dizziness is found among people who take Prilosec, especially for people who are female, 60+ old , have been taking the drug for 10+ years, also take medication Aspirin, and have Pain.