The flu is treated with a combination of rest, symptom relief, and, in some cases, prescription antiviral medications. Most healthy people recover on their own within a week or so using basic home care. Antivirals can shorten the illness by roughly a day, but they work best when started within 48 hours of your first symptoms, and they’re most important for people at higher risk of complications.
Antiviral Medications
Four prescription antivirals are approved to treat influenza. They don’t cure the flu instantly, but they can reduce how long you feel sick and lower the chance of serious complications. In clinical trials, starting antiviral treatment within two days of symptom onset shortened illness duration by about one day compared to no treatment. That may sound modest, but for people at risk of hospitalization, even a small reduction in viral activity matters.
The most commonly prescribed option is oseltamivir (Tamiflu), a pill or liquid approved for anyone 14 days and older. Baloxavir (Xofluza) is a single-dose pill for people 5 and older, which makes it convenient since you only take it once. Zanamivir (Relenza) is an inhaled powder approved for ages 7 and up. Peramivir (Rapivab) is given as a single IV infusion by a healthcare provider and is approved for people 6 months and older.
Timing matters more than the specific drug. The benefit is greatest when treatment starts within 48 hours. One study in children found that even starting treatment at the 72-hour mark still reduced symptoms by a day compared to placebo. For hospitalized patients, some evidence suggests antivirals can help even when started four or five days after symptoms begin.
Who Needs Antivirals Most
Most otherwise healthy people with mild flu symptoms don’t need antiviral drugs. The CDC recommends prompt antiviral treatment specifically for people at higher risk of serious flu complications. That includes:
- Adults 65 and older
- Children younger than 2
- Pregnant women (and up to two weeks postpartum)
- People with chronic conditions like asthma, COPD, diabetes, heart disease, kidney or liver disorders, and sickle cell disease
- People with weakened immune systems from illness or medications
- People with a BMI of 40 or higher
- Residents of nursing homes or long-term care facilities
If you fall into any of these groups and develop flu symptoms, contact your doctor quickly rather than waiting to see if you improve on your own. The treatment window is narrow, and the stakes are higher.
Over-the-Counter Symptom Relief
Antivirals target the virus itself. Over-the-counter medications handle the symptoms that make you miserable while your body fights off the infection. Acetaminophen (Tylenol) and ibuprofen (Advil, Motrin) both lower fever and relieve the muscle aches and headaches that come with the flu. Choose one or the other, and follow the dosing instructions on the label.
Decongestants can help with a stuffy nose, and cough suppressants may let you sleep better at night. These won’t speed your recovery, but they make the days of illness more bearable. One important note: antibiotics do not work against the flu. Influenza is a virus, and antibiotics only fight bacterial infections. Taking antibiotics when you don’t have a bacterial infection won’t help and can actually cause harm.
Home Care That Actually Helps
Rest is not just generic advice. Your immune system works harder when you’re sleeping, and pushing through the flu by going to work or exercising tends to prolong symptoms. Stay home and give your body a real chance to recover.
Hydration is the other essential piece. Fever, sweating, and reduced appetite all pull fluid from your body. Water, broth, herbal tea, and electrolyte drinks all count. You don’t need to hit a specific number of ounces per day, but if your urine is dark or you’re not urinating much, you need more fluids.
Humidity in your living space can also make a noticeable difference. Moist air helps loosen mucus, eases nasal congestion, and soothes a raw, irritated throat. If you use a humidifier, aim for indoor humidity between 40% and 60%. That range is the most effective for both respiratory comfort and reducing the survival of viruses in the air. Clean the humidifier regularly to prevent mold buildup.
When the Flu Leads to Something Worse
The flu itself is usually self-limiting, but it can open the door to secondary bacterial infections, particularly pneumonia. The classic warning sign is a pattern doctors sometimes call “getting better, then getting worse.” You start to improve, your fever breaks, you feel like you’re turning a corner, and then symptoms come roaring back with a new round of fever, worsening cough, or chest pain. That rebound pattern suggests bacteria have taken hold in airways weakened by the virus, and at that point antibiotics are appropriate.
Outside of that scenario, antibiotics during the flu are unnecessary and potentially counterproductive. Research published in the Journal of Clinical Investigation found that antibiotic use during an active influenza infection, when no bacterial infection was present, actually increased the risk of developing a secondary bacterial pneumonia afterward by disrupting immune function in the lungs.
Warning Signs That Need Emergency Care
Most flu cases resolve at home, but certain symptoms signal that something dangerous is happening. In adults, get emergency medical care for difficulty breathing, persistent chest or abdominal pain, confusion or difficulty staying alert, seizures, severe weakness, or not urinating. A fever or cough that improves and then suddenly returns or worsens also warrants urgent attention.
In children, watch for fast or labored breathing, bluish lips or face, ribs visibly 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 during flu season needs immediate medical evaluation. A fever above 104°F that doesn’t respond to fever-reducing medication is also an emergency.