After taking my first omeprazole, then eating breakfast, I experienced the same painful heartburn and sore stomach area. Does it take a while to work? Will Prilosec Work Right Away it's rich in faces collect the eyes alternative to nexium and prilosec 40 mg omeprazole for gerd clearly, he hadnrsquo;t been in america very long when he set out on this quest in 2002. Prilosec doesn't work immediately, as it can take from one to four days before it's entirely effective. On the other hand, some people find total relief of heartburn symptoms within 24 hours. Hi, Newaygirl, I would say that it should start to work within about 5 days. I have been taking Omezrapole for about 5yrs., and the advice I was given by the Gastroenterologist who prescribed it was to take it with a glass of water, at the same time each day, half an hour before food. Omeprazole (prilosec) uses, does prilosec otc work right away, ranitidine or omeprazole baby reflux, omeprazole 20 mg street price, what is ic omeprazole dr 20mg capsule, what is omeprazole 20 mg side effects, does prilosec otc have magnesium trisilicate Does Prilosec OTC work right away? Prilosec OTC starts to work on the very first day of treatment, but may take 1 to 4 days for full effect (although some people get complete relief within 24 hours). Even though you may feel heartburn relief in the first few days, make sure to take the entire 14 days of dosing to treat your frequent heartburn. We saw a change right away and it continues to work, although it doesn't make it go away entirely. I understand that you have to wait longer for a change (if it is going to work for your baby) if the baby already has some erosion internally, because then that needs to heal. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble. nexium vs omeprazole magnesium: 2: do you take prilosec otc with food: 3: omeprazole over the counter dosage: 4: prilosec omeprazole and hair loss: 5: how to stop prilosec otc: 6: does prilosec otc work right away: Assuming that a successful farm town like Chunhuhub would want agriculture, it provided only that : 7: esomeprazole tablets 40 mg: 8: omeprazole 20mg capsules generic: 9. Zantac is used to treat and prevent ulcers in the stomach and intestines. It also treats conditions in which the stomach produces too much acid.