Nexium 40mg Tablets contains esomeprazole which is a proton pump inhibitor that works by reducing the stomach acid secretion.
Proton pump inhibitors work to relieve acid reflux symptoms by stopping the cells in the lining of the stomach from producing too much acid.
Nexium tablets are usually completely safe for most adults. However, you must not take this medicine if:
You are allergic to any of the ingredients
You are allergic to medicines containing other proton pump inhibitors
You are taking a medicine containing nelfinavir (used to treat HIV)