The FDA provides a patient education website on most commonly used drugs and you can get more information on Omeprazole here http://www.fda.gov/AboutFDA/CentersOffices/OfficeofMedicalProductsandTobacco/CDER/ucm220956.htm
If you have specific questions that this does not address, let us know.
I was told there is no real evidence it reacts with clopidogrel (plavix) and if it does, the effect is tiny. My INR didn't change on this medication for 2 years. It would seem Aspirin is the culprit for causing my stomach issues, so I've been taken off aspirin and put back onto plavix for life.
Be aware that should be used for certain ulcers ONLY for short periods (up to 8 weeks).
Longer use can have side effects. You will not assimiliate Vit. B and calcium and can produce lost of magnesium. Also can interact with cardiac medication like diuretics and clopidogrel.
Jesus
Omeprazole is a proton pump inhibitor. Your stomach lining has a mucus which protects it from the acid, which is actually quite strong. If the mucus doesn't do it's job right or you produce too much acid, then you can form ulcers. There is also a band of muscle at the bottom of the oesophagus where it joins the stomach, which can weaken with age or too much acid splash back, which allows acid into the oesophagus. This isn't good because it has no protection from the acid, becomes damaged and inflamed, and very painful. Proton pump inhibitors such as omeprazole ensure your stomach produces less acid, giving help for repair of ulcers, or helping with acid reflux in the oesophagus.