Both weight gain and weight loss are metabolic side effects listed for Nexium on RxList. People looking to use an acid reducer that does not cause weight gain should talk with their doctor.
Nexium is esomeprazole magnesium and given in the treatment of ulcers and gastroesophageal reflux disease. Dosages range between 2.5 milligrams and 40 milligrams, depending on the condition treated. While once a prescription-only medication, Nexium is now sold over the counter in drugstores and pharmacies across the nation. It is an oral medication that needs to be taken about an hour prior to meals for it to be effective as an acid reducer, says RxList.