Esomeprazole magnesium is not omeprazole magnesium plus another innocuous drug. Esomeprazole magnesium has much smaller side effects on the kidneys than omeprazole magnesium. Suitable for patients with renal dysfunction, such as unilateral nephrectomy. I am not an expert, but for reference, you can read the instructions of the two medicines carefully.
When omeprazole magnesium was first imported, it was patent protected and the price was also very expensive, similar to the current esomeprazole magnesium. Now that the protection period has passed and domestic products are available, they are cheaper. So will esomeprazole magnesium (Nexium).