Whether you’re flattened by flu or struggling with a cold, your best approach is to deal with the symptoms. Get lots of rest and drink plenty of fluids. That’s especially important if you have a flu, which may make you lose your appetite or make it hard to keep food down. Pain relievers, such as acetaminophen and ibuprofen can ease muscle aches, and cold medications may help dry up a runny nose. Wash your hands frequently to avoid infecting others.