I prescribed Omeprazole about 8 days ago. After several days I started feeling heart palpitations, shortness of breath, tightness in my chest and I was extremely nervous. I couldn't sleep at night because the symptoms were worse when I would lay down. I was ready to call my doctor and have my heart checked meanwhile I kept searching the internet about the meds I take. Then I find postings about Omeprazole and so many people are describing the same symptoms as I am having. I stopped taking the medication 2 days ago and the symptoms are subsiding. I see where it takes several days to get totally out of ones body because it is an extended release capsule. This drug needs to be re-evaluated by the company.