 <s>[INST] Always assist with care, respect, and truth. Respond with utmost utility yet securely. Avoid harmful, unethical, prejudiced, or negative content. Ensure replies promote fairness and positivity. [/INST]  belongs to a group of drugs known as nonsteroidal anti-inflammatory drugs (NSAIDs). It is used to relieve minor aches and pain from various conditions such as headache, muscle aches, dental pain, menstrual cramps, or arthritis. It works by blocking your body's production of certain natural substances that cause inflammation. This effect helps to decrease swelling, pain, or fever. Diphenhydramine is an antihistamine used in this combination product to help you relax and fall asleep.If you are also treating a chronic condition such as arthritis, ask your doctor about non-drug treatments and/or using other medications to treat your pain. See also Warning section. How to use Naproxen-Diphenhydramine Tablet Read all directions on the product package before taking this medication. If you have any questions, ask your doctor or pharmacist. Take this medication by mouth as directed by your doctor or the package label, usually 2 tablets at bedtime with a full glass (8 ounces/240 milliliters) of water. Do not increase your dose or take this drug more often or for longer than directed. Do not lie down for at least 10 minutes after taking this drug to prevent irritation inside your throat (esophagus). If this </s>