The flu responds best to a combination of rest, fluids, over-the-counter pain and fever relievers, and, in some cases, prescription antiviral medication started within the first two days of symptoms. What you take depends on how severe your symptoms are, how long you’ve been sick, and whether you’re at higher risk for complications.
Prescription Antivirals
Four FDA-approved antiviral drugs are currently recommended for treating the flu. The most widely prescribed is oseltamivir (Tamiflu), a pill or liquid taken twice daily for five days. A newer option, baloxavir (Xofluza), requires only a single dose by mouth, which makes it convenient if you catch it early enough.
These antivirals work best when started within one to two days of your first symptoms. They shorten the duration of illness, reduce severity, and lower the risk of complications like pneumonia. Starting them later can still help, particularly if you’re in a higher-risk group: adults 65 and older, pregnant women, young children, or anyone with a chronic condition like asthma, diabetes, or heart disease. You’ll need a prescription, so if you suspect you have the flu and fall into one of these groups, contact your doctor quickly rather than waiting to see if you improve on your own.
Pain and Fever Relief
For the body aches, headache, and fever that come with the flu, acetaminophen (Tylenol) and ibuprofen (Advil, Motrin) are your two main options. Most research suggests they perform similarly for bringing down fevers in adults, so the choice comes down to your body and your preferences.
Ibuprofen is a nonsteroidal anti-inflammatory drug that blocks the chemicals causing inflammation, so it tends to be especially helpful when your muscles and joints feel swollen and painful. Acetaminophen works differently, reducing pain signals within the nervous system rather than at the source. It’s generally easier on the stomach, which matters when the flu is already making you nauseous.
The maximum safe daily dose of acetaminophen for adults is 4,000 milligrams, though many clinicians recommend staying closer to 3,000 milligrams to protect your liver. For ibuprofen, the over-the-counter ceiling is 1,200 milligrams per day (three standard doses), though under medical supervision it can go up to 2,400 milligrams. Be careful with combination cold and flu products, many of which contain acetaminophen. It’s easy to double up without realizing it.
One critical safety note for parents: never give aspirin to children or teenagers with the flu. Aspirin use during a viral infection is linked to Reye’s syndrome, a rare but serious condition that causes swelling in the liver and brain. This risk is highest when aspirin is combined with the flu or chickenpox, especially in children with certain metabolic conditions. Stick with acetaminophen or ibuprofen for kids.
Fluids and Electrolytes
Dehydration is one of the most underestimated parts of having the flu. Fever, sweating, a runny nose, and coughing all drain fluids from your body faster than you’d expect. That fluid loss doesn’t just make you thirsty. It can leave you fatigued well after the worst symptoms have passed, and it thickens mucus, making congestion harder to clear.
Water is the foundation, but plain water alone doesn’t replace the electrolytes you’re losing through sweat and fever. Electrolyte drinks, coconut water, or oral rehydration solutions like Pedialyte help restore sodium and potassium levels more effectively. Broth-based soups serve double duty by providing both fluids and salt. If you’re vomiting or have diarrhea, small frequent sips work better than trying to drink large amounts at once.
A good rule of thumb: if your urine is dark yellow or you’re urinating very infrequently, you need more fluids. Not urinating at all is a warning sign that warrants medical attention.
Cough and Congestion Relief
A persistent cough and stuffed-up sinuses are often the symptoms that linger longest. For congestion, saline nasal sprays or rinses help loosen mucus without medication. Over-the-counter decongestant sprays provide faster relief but shouldn’t be used for more than three days, as they can cause rebound congestion that’s worse than the original problem.
For coughs, the approach depends on the type. A wet, productive cough is actually helping your body clear mucus, so suppressing it isn’t always ideal. A dry cough that keeps you up at night may respond to a cough suppressant containing dextromethorphan. Honey (one to two teaspoons) is a surprisingly effective cough soother for adults and children over one year old, and it works comparably to some over-the-counter options in studies.
Supplements Worth Considering
Zinc and vitamin C are the two supplements with the most evidence behind them, though the benefits are modest. Zinc, taken at the onset of symptoms, may shorten the duration of illness by a few days. The key is timing: starting zinc after the first day or two of symptoms doesn’t appear to help much.
Vitamin C at around 200 milligrams per day may slightly reduce the severity and duration of illness. In practical terms, you might feel better about 13 hours sooner during a typical seven-day bout. That’s not dramatic, but combined with everything else, it contributes. Most of this research was conducted on colds rather than influenza specifically, so the translation to the flu isn’t perfect, but the mechanisms overlap enough that many doctors consider it reasonable.
Elderberry supplements are popular for flu relief, and some small studies suggest they may help reduce symptom duration. The evidence is thinner than for zinc or vitamin C, so treat elderberry as a possible addition rather than a cornerstone of your recovery plan.
Warning Signs That Need Immediate Attention
Most people recover from the flu within one to two weeks with the measures above. But certain symptoms signal that something more serious is happening. In adults, seek emergency care for difficulty breathing or shortness of breath, persistent pain or pressure in the chest or abdomen, confusion or inability to stay awake, seizures, not urinating, severe muscle pain, or severe weakness and unsteadiness. A fever or cough that improves and then returns or gets worse is also a red flag, as it can indicate a secondary infection like pneumonia.
In children, watch for fast breathing or trouble breathing, bluish lips or face, ribs pulling in with each breath, refusal to walk due to muscle pain, or signs of dehydration like no urine for eight hours, a dry mouth, or no tears when crying. Any fever in a baby younger than 12 weeks warrants an immediate call to your pediatrician, regardless of how mild it seems. A fever above 104°F that doesn’t respond to fever-reducing medication also requires prompt medical evaluation.