For most people with the flu, treatment is a combination of over-the-counter medications to manage symptoms and, in some cases, a prescription antiviral to shorten the illness. What you’re given depends on how severe your symptoms are, how long you’ve been sick, and whether you’re at higher risk for complications.
Prescription Antivirals
There are four FDA-approved antiviral drugs used to treat the flu. The most commonly prescribed is oseltamivir (Tamiflu), a pill or liquid you take twice a day for five days. Baloxavir (Xofluza) is a newer option that works as a single dose, one pill, and you’re done. Both are taken by mouth and available for most age groups.
The other two are less common. Zanamivir (Relenza) is an inhaled powder, which makes it a poor fit for anyone with asthma or COPD. Peramivir (Rapivab) is given as a one-time IV infusion in a clinical setting, so it’s typically reserved for people who can’t take medication by mouth.
These drugs don’t cure the flu. They work by slowing down the virus’s ability to reproduce in your body, which shortens the illness and reduces the severity of symptoms. The catch is timing: antivirals are most effective when started within 48 hours of your first symptoms. After that window, the benefit drops significantly for mild cases. For people who are hospitalized or have severe illness, though, antivirals can still help even when started later.
Who Gets a Prescription
Not everyone with the flu needs an antiviral. Doctors prioritize them for people who are hospitalized, have severe or worsening symptoms, or fall into a higher-risk group. That includes adults 65 and older, children under 5, pregnant women, and people with chronic conditions like heart disease, diabetes, or a weakened immune system. If you’re otherwise healthy and your symptoms are manageable, your doctor may recommend riding it out with over-the-counter relief instead.
Over-the-Counter Medications
Most flu treatment happens at home with drugs you can buy at any pharmacy. The key is matching the right ingredient to your specific symptoms, since many combination products bundle several active ingredients together.
- Fever and body aches: Acetaminophen (Tylenol) or ibuprofen (Advil, Motrin) are the go-to options. Both reduce fever and relieve the headaches, muscle aches, and soreness that make the flu so miserable.
- Cough: Dextromethorphan is the most common cough suppressant in over-the-counter flu products. It helps quiet a dry, nagging cough but won’t do much for a productive one.
- Nasal congestion: Phenylephrine and pseudoephedrine are the two decongestant options. Pseudoephedrine is generally considered more effective but is kept behind the pharmacy counter in most states.
- Sore throat: Acetaminophen or ibuprofen both help here, along with throat lozenges or sprays containing a mild numbing agent.
Combination products like DayQuil or NyQuil bundle several of these ingredients into one dose. They’re convenient, but check the label carefully. If you’re also taking standalone acetaminophen for fever, it’s easy to accidentally double up and exceed a safe dose.
Aspirin and Children: A Critical Warning
Never give aspirin to children or teenagers with the flu. Aspirin use during a viral illness is linked to Reye’s syndrome, a rare but serious condition that causes swelling in the liver and brain. Most children who develop Reye’s syndrome survive, but lasting brain damage is possible, and without treatment it can be fatal within days.
Aspirin hides in products you might not expect, including Alka-Seltzer and some herbal remedies. It also goes by other names on labels: acetylsalicylic acid, acetylsalicylate, salicylic acid, and salicylate. For children’s fever and pain, stick with acetaminophen or ibuprofen in their pediatric formulations.
Rest and Hydration
This advice sounds basic, but it matters more than most people realize. When your body is fighting the flu, fever, sweating, vomiting, and diarrhea all drain fluids fast. Dehydration makes symptoms worse and slows recovery. Water is fine, but broth and electrolyte drinks help replace the sodium and potassium you’re losing. If you’re struggling to keep fluids down, small frequent sips are easier on your stomach than large glasses.
Rest means actual rest. Limit physical activity and give your immune system the energy it needs to clear the virus. Most healthy adults feel significantly better within a week, though fatigue can linger for another week or two after the worst symptoms resolve.
Do Supplements Help?
Zinc, vitamin C, elderberry, and echinacea are all popular choices, but the evidence behind them is thin. Zinc may shorten the duration of cold symptoms by a few days, though experts at the Cleveland Clinic stop short of recommending it. Vitamin C taken daily (around 200 mg) might help you feel better roughly 13 hours sooner during a typical week-long illness, a real but modest effect. Elderberry, garlic, echinacea, and fire cider remain unproven.
None of these supplements replace antivirals or standard symptom relief. If you want to try them, they’re unlikely to cause harm at normal doses, but don’t skip proven treatments in favor of them.
When the Flu Gets Serious
Most people recover from the flu at home, but severe cases require hospital care. If you’re having trouble breathing, persistent chest pain, confusion, severe vomiting, or your symptoms improve and then suddenly return with worse fever and cough, those are signs the illness is progressing. In the hospital, treatment typically includes antiviral medication alongside supportive care like IV fluids and supplemental oxygen to keep your body stable while it fights the infection. Antivirals are started regardless of how long symptoms have been present in hospitalized patients, because the potential benefit outweighs the narrower treatment window that applies to milder cases.