If you have the flu, the most important steps are to rest, stay hydrated, and manage your symptoms with the right over-the-counter medications. Most healthy adults recover within one to two weeks without medical treatment. But if you fall into a high-risk group or your symptoms take a sharp turn, acting quickly can prevent serious complications.
Start With Rest and Fluids
Your body fights the flu most effectively when you’re resting. Disrupting your normal sleep-wake cycle during an active infection can throw off your immune response, causing inflammatory cells to build up in your lungs and making recovery harder. This means staying home, sleeping as much as your body asks for, and keeping a consistent rest schedule rather than pushing through your day.
Fever, sweating, and any vomiting or diarrhea pull fluid and electrolytes out of your body fast. Water alone doesn’t replace what you’re losing. Drinks that contain electrolytes, like oral rehydration solutions or low-sugar sports drinks, restore your fluid balance more effectively. Broth-based soups work well too, since they provide both sodium and liquid. Watch for signs of dehydration: dark urine, dry mouth, dizziness, or unusual fatigue beyond what the flu itself causes. If you notice these, increase your fluid intake right away.
Treat Each Symptom Separately
It’s tempting to grab a combination “multi-symptom” product, but you’re better off treating each symptom individually. Combination products often include ingredients you don’t need, increasing the chance of side effects or accidentally doubling up on a medication.
For fever and body aches, acetaminophen (Tylenol) or ibuprofen (Advil) are your best options. Either one reduces fever and relieves the muscle pain that makes the flu feel so miserable. Don’t take both at the same time unless you’ve confirmed with a pharmacist that it’s safe for your situation, and always follow the dosing on the label. Acetaminophen in particular is easy to overdose on because it’s hidden in so many products.
For a stuffy nose, a decongestant containing pseudoephedrine (Sudafed) is more effective than phenylephrine-based alternatives. If you prefer a nasal spray, oxymetazoline (Afrin) works quickly, but don’t use it for more than three days in a row. Beyond that, your congestion can rebound and get worse than it was before you started.
For a sore throat, warm liquids, lozenges, and a pain reliever you’re already taking for fever will typically handle it. A dry cough can linger well after the rest of your symptoms resolve, which is normal.
Know When to Call About Antivirals
Prescription antiviral medications can shorten your illness and reduce the risk of complications like pneumonia, but they work best when started within 48 hours of your first symptoms. After that window, the benefit drops significantly, though there’s some evidence that starting treatment even at 72 hours can still shave about a day off your symptoms.
Not everyone needs antivirals. For otherwise healthy adults, the flu is unpleasant but self-limiting. Antivirals are most important for people at higher risk of serious complications, including:
- Adults 65 and older
- Children younger than 2
- Pregnant women (including up to two weeks after delivery)
- People with asthma, COPD, diabetes, heart disease, kidney or liver disorders, or a weakened immune system
- People with a BMI of 40 or higher
- People who have had a stroke or have conditions affecting muscle function, lung function, or the ability to cough and clear their airways
- Residents of nursing homes or long-term care facilities
If you fall into any of these groups, contact your doctor as soon as symptoms appear. The 48-hour clock matters, so don’t wait to see if you feel better on your own first.
Flu, Cold, or COVID-19
The flu hits fast. Symptoms typically appear one to four days after infection and come on abruptly, often within hours. You might feel fine in the morning and be flat on your back with a high fever, severe body aches, and exhaustion by evening. A common cold, by contrast, builds gradually over a couple of days and centers on your nose and throat rather than your whole body.
COVID-19 is harder to distinguish. It shares nearly every flu symptom: fever, cough, fatigue, sore throat, congestion, muscle pain, headache, and sometimes vomiting or diarrhea. Loss of taste or smell is more common with COVID-19, though it doesn’t happen to everyone. COVID symptoms also tend to take longer to appear, typically two to five days after exposure but sometimes up to 14. You genuinely cannot tell the difference between flu and COVID by symptoms alone. If it matters for your treatment decisions or the people around you, a rapid test is the only way to know.
How Long to Stay Home
Most people are contagious starting about a day before symptoms appear and remain contagious for five to seven days after getting sick. Children and people with weakened immune systems may be contagious even longer. The general guidance is to stay home until your fever has been gone for at least 24 hours without using a fever-reducing medication. Going back to work or school before that puts the people around you at real risk.
Expect the worst of your symptoms (high fever, severe aches, complete exhaustion) to last three to five days. A lingering cough, mild fatigue, and general weakness can stick around for another week or two. If you’re still feeling wiped out after three weeks, that’s worth a call to your doctor.
Emergency Warning Signs
Most flu cases resolve at home, but certain symptoms mean something more serious is happening. In adults, seek immediate medical care for difficulty breathing or shortness of breath, persistent chest pain or pressure, sudden dizziness or confusion, severe or persistent vomiting, or flu symptoms that improve and then return with a worse fever and cough. That last pattern often signals a secondary infection like pneumonia.
In children, the warning signs include fast or labored breathing, ribs pulling in visibly with each breath, bluish lips or face, chest pain, muscle pain so severe the child refuses to walk, and signs of dehydration like no urination for eight hours, a dry mouth, or no tears when crying. A child who isn’t alert or interacting normally when awake needs emergency evaluation.