If you have the flu, the most effective option is a prescription antiviral, ideally started within 48 hours of your first symptoms. For most people riding it out at home, over-the-counter pain relievers, a cough medicine, and plenty of fluids will manage symptoms while your body fights the virus. Here’s a breakdown of what works, what helps a little, and what to skip.
Prescription Antivirals: The Only Drugs That Fight the Virus
Over-the-counter medicines only treat symptoms. Prescription antivirals actually attack the influenza virus itself, shortening how long you’re sick and reducing your risk of complications like pneumonia. The benefit is greatest when you start treatment within 48 hours of feeling sick, so call your doctor early if you think you have the flu rather than waiting to see if it gets worse.
Four antiviral medications are currently approved for influenza:
- Oseltamivir (Tamiflu) is the most commonly prescribed. It’s a pill or liquid taken twice daily for five days, approved for anyone 14 days and older.
- Baloxavir (Xofluza) is a single pill, one dose, and you’re done. It’s approved for people 5 and older.
- Zanamivir (Relenza) is an inhaled powder, approved for ages 7 and up. It’s not a good fit for people with asthma or other breathing conditions.
- Peramivir (Rapivab) is given as a single IV infusion in a medical setting, approved for ages 6 months and older.
If you’re past the 48-hour window, antivirals can still help in certain situations. Studies of hospitalized flu patients have found benefits even when treatment started 4 or 5 days after symptoms began. This matters most for people at higher risk of serious complications.
Who Should Get Antivirals Right Away
The CDC recommends prompt antiviral treatment for anyone at higher risk of flu complications, regardless of how mild their symptoms seem. This includes adults 65 and older, children under 2, pregnant women (and up to two weeks postpartum), and people living in nursing homes or long-term care facilities.
A long list of chronic conditions also qualifies you: asthma, COPD, heart disease, diabetes, kidney or liver disorders, sickle cell disease, a weakened immune system (from HIV, cancer treatment, or immunosuppressive medications), a history of stroke, or a BMI of 40 or higher. If any of these apply to you, don’t wait to see how you feel. Contact your doctor as soon as flu symptoms start.
OTC Pain and Fever Relief
Acetaminophen (Tylenol) and ibuprofen (Advil, Motrin) are the go-to options for the fever, headaches, and body aches that make the flu miserable. Both lower fever effectively. Ibuprofen also reduces inflammation, which can help with that deep muscle soreness. You can alternate between the two if one alone isn’t controlling your fever, since they work through different mechanisms.
One critical safety rule: 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 potentially fatal condition that causes dangerous swelling in the liver and brain. This applies to any product containing aspirin, including those labeled as acetylsalicylic acid or salicylate. Stick to acetaminophen or ibuprofen for anyone under 19.
Managing Cough and Congestion
Flu coughs fall into two categories, and the right medicine depends on which type you have. A dry, hacking cough that isn’t bringing anything up responds best to a cough suppressant containing dextromethorphan (the “DM” on many cold medicine labels). A wet, productive cough with chest congestion calls for an expectorant like guaifenesin (Mucinex). Guaifenesin works by adding water to the mucus in your airways, making it thinner and easier to cough up. It won’t stop the coughing, but it makes each cough more effective at clearing mucus out.
For a stuffy nose, pseudoephedrine (Sudafed) or phenylephrine-based decongestants can open up your nasal passages. Pseudoephedrine is generally more effective but is kept behind the pharmacy counter in most states.
Many multi-symptom flu products combine several of these ingredients in one pill. If you go that route, check the label carefully so you don’t accidentally double up on acetaminophen by taking a multi-symptom product and a separate fever reducer at the same time.
Fluids, Rest, and the Basics
This advice sounds boring, but it matters more than most people realize. Flu fevers cause you to lose water fast through sweating, and the combination of fever, reduced appetite, and fatigue makes dehydration a real risk. Water, broth, electrolyte drinks, and herbal tea all count. If your urine is dark yellow or you’re going to the bathroom much less than usual, you need to drink more.
Rest isn’t optional. Your immune system does its heaviest work while you sleep, and pushing through the flu to go to work or exercise tends to extend recovery time. Most healthy adults feel significantly better within 5 to 7 days, though cough and fatigue can linger for two weeks or more.
Supplements: Limited Evidence
Zinc, vitamin C, and elderberry are the most popular natural remedies people reach for during the flu. The evidence is underwhelming. Most research on these supplements was done on common colds rather than influenza specifically.
Zinc may shorten cold symptoms by a few days, but it commonly causes nausea, diarrhea, and a metallic taste. Vitamin C taken daily might help you feel better about 13 hours sooner during a typical week-long illness, a modest benefit at best. Elderberry is widely marketed for immune support, but the clinical evidence doesn’t back up the claims. None of these are substitutes for antivirals or even basic OTC symptom relief.
Warning Signs That Need Emergency Care
Most flu cases resolve on their own, but certain symptoms signal that something more dangerous is happening. In adults, seek emergency care for difficulty breathing, persistent chest or abdominal pain, confusion or inability to stay awake, seizures, not urinating, severe weakness, or a fever and cough that improve and then come back worse. That last one, a rebound in symptoms, can indicate a secondary bacterial infection like pneumonia.
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, no urine for 8 hours, or a fever above 104°F that doesn’t respond to fever-reducing medicine. For babies under 12 weeks, any fever during flu season warrants immediate medical attention.