Most flu symptoms resolve on their own within three to seven days, but the right combination of rest, fluids, and over-the-counter remedies can make that week significantly more bearable. For some people, prescription antivirals can shorten the illness further, especially when started early. Here’s what actually works.
Start Antivirals Early if You Can
Prescription antiviral medications work best when started within 48 hours of your first symptoms. That’s a tight window, so if you suspect the flu and you’re in a high-risk group (pregnant, over 65, or living with a chronic condition like asthma or diabetes), call your doctor right away rather than waiting to see how you feel.
Antivirals don’t cure the flu, but they can cut your sick time by roughly a day and reduce the risk of serious complications. Even if you’re past the 48-hour mark, there’s some evidence that treatment started within 72 hours still offers modest benefit. For influenza B specifically, one newer antiviral shortened symptom duration by more than 24 hours compared to older options. Your doctor will determine which medication fits your situation, your age, and whether you’re pregnant or breastfeeding.
Managing Fever and Body Aches
Fever is one of the most miserable parts of the flu, but it’s also your immune system’s way of fighting the virus. You don’t need to eliminate a mild fever entirely. The goal is to bring it down enough that you can rest comfortably, stay hydrated, and sleep.
Acetaminophen (Tylenol) and ibuprofen (Advil, Motrin) are the two main options. Acetaminophen can be taken every four to six hours; ibuprofen every six to eight hours. Both reduce fever and relieve the deep muscle aches that make it hard to get out of bed. Don’t take both at the same time unless you’ve confirmed it’s safe with a pharmacist, and stick to the dosing instructions on the label. For children, dosing is weight-based, so check the packaging carefully or ask your pediatrician.
Staying Hydrated During a Fever
Fever increases how quickly your body loses water, which means dehydration can sneak up on you even if you don’t feel particularly thirsty. Adults between 18 and 64 should aim for 9 to 12 cups (about 2.2 to 3 liters) of fluid per day. Adults over 65 need at least 6 to 8 cups (1.5 to 2 liters).
Water is fine, but warm broths and electrolyte drinks have the added benefit of replacing sodium and potassium lost through sweating. Sip throughout the day rather than trying to drink large amounts at once, which can cause nausea when your stomach is already uneasy. If you notice you’ve stopped urinating, your mouth feels dry, or you feel dizzy when standing, those are signs dehydration is getting ahead of you.
Over-the-Counter Relief for Cough and Congestion
The flu often hits with a dry, hacking cough and a stuffed-up nose that makes sleeping nearly impossible. Two ingredients are worth knowing about. Dextromethorphan (found in products labeled “DM”) is the most effective over-the-counter option for suppressing a cough. Pseudoephedrine is the strongest OTC decongestant for nasal stuffiness, though you’ll typically need to ask for it at the pharmacy counter.
If your symptoms are worst at night, a first-generation antihistamine (like diphenhydramine, the active ingredient in Benadryl) can help dry up a runny nose and has the side benefit of making you drowsy enough to sleep. Be cautious about combination products that bundle several active ingredients together. It’s easy to accidentally double up on acetaminophen if your cold-and-flu pill already contains it.
Humidity, Rest, and Other Home Measures
Keeping your home’s humidity between 30% and 50% helps soothe irritated airways and can ease coughing. A cool-mist humidifier in your bedroom works well, but clean it daily to prevent mold growth. A hot shower serves the same purpose in the short term.
Honey (one to two teaspoons, straight or in warm water) can coat an irritated throat and may calm a cough, particularly at bedtime. It’s safe for adults and children over one year old. Zinc supplements have more mixed evidence. Some studies suggest zinc shortens cold symptoms by a few days, but others show no benefit, and side effects like nausea, bad taste, and mouth irritation are common. The upper safe limit for adults is 40 milligrams per day. Avoid zinc nasal sprays entirely, as they’ve been linked to permanent loss of smell.
Beyond remedies, the single most important thing you can do is genuinely rest. That means staying home, sleeping as much as your body wants, and not pushing through work or errands. The flu demands energy from your immune system, and giving it that energy is what gets you better.
What a Typical Recovery Looks Like
For most people, the worst of the flu (high fever, severe body aches, exhaustion) lasts three to five days. By day seven, the major symptoms have usually cleared. Cough and general tiredness, though, can linger for two weeks or more. This is especially common in older adults and people with chronic lung conditions. Don’t be alarmed if you still feel wiped out after the fever breaks. Post-viral fatigue is normal and doesn’t mean something else is wrong.
One pattern to watch for: symptoms that improve and then suddenly get worse again. A fever that returns after a day or two of feeling better, or a cough that intensifies after initially easing, can signal a secondary bacterial infection like pneumonia.
Warning Signs That Need Immediate Attention
Most flu cases resolve at home without complications. But certain symptoms mean you should seek emergency care, not just a phone call to your doctor.
- In adults: difficulty breathing or shortness of breath, persistent chest or abdominal pain, confusion or inability to stay awake, seizures, not urinating, severe weakness or unsteadiness, or a fever/cough that improves then returns worse than before.
- In children: 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, not being alert or interactive when awake, seizures, or a fever above 104°F that doesn’t respond to medication. Any fever in a baby younger than 12 weeks warrants immediate medical evaluation.
Extra Precautions for High-Risk Groups
Pregnant women are at higher risk for flu complications and should start antiviral treatment as soon as influenza is suspected, without waiting for test results. The standard course is five days. Some pregnant women may need adjusted doses because pregnancy changes how quickly the body processes the medication. Not all antivirals are safe during pregnancy or breastfeeding, so your provider will choose accordingly.
Adults over 65, people with heart disease, lung disease, diabetes, or weakened immune systems also fall into the high-risk category. For these groups, antivirals are recommended even if more than 48 hours have passed since symptoms started, because the risk of hospitalization and complications is substantially higher. If you live with someone in a high-risk group and you get the flu, their doctor may prescribe preventive antiviral medication to reduce their chances of getting sick.