Which of the following is NOT considered an acid reducer?

The medication Tylenol with codeine is primarily an analgesic and opioid that is used to relieve pain, and it does not have properties that reduce stomach acid. In contrast, Zantac (ranitidine) and Nexium (esomeprazole) are both well-known acid reducers; Zantac is an H2 antagonist, and Nexium is a proton pump inhibitor, both of which are specifically designed to decrease the amount of acid produced in the stomach. Prilosec (omeprazole) also falls into the category of proton pump inhibitors. Therefore, Tylenol with codeine is the only choice that does not function as an acid reducer, making it the correct answer.