Somewhat off topic, but Nexium (Esomeprazole) is just a tweak of good old Omeprazole, one of those tweaks that labs put on the market to counter cheap generics. In this case, after a couple of months of Nexium, I reverted to Ompeprazole (Miracid), which I found just as good, at four Baht a tablet. While I am insured for OPD and Medications. AI says: "Nexium (esomeprazole) and Prilosec (omeprazole) are both highly effective Proton Pump Inhibitors (PPIs) used to treat acid reflux, GERD, and stomach ulcers. Nexium is a refined, more potent version of omeprazole. While Nexium provides stronger acid suppression and works slightly faster, omeprazole is generally more affordable and interacts with fewer medications. [1, 2, 3, 4, 5]"