The flu responds best to a combination of rest, fluids, over-the-counter medications for symptom relief, and in some cases, a prescription antiviral started within 48 hours of your first symptoms. Most healthy adults can manage the flu at home, but the right mix of treatments can shorten how long you feel miserable and prevent complications.
Prescription Antivirals
Four prescription antiviral medications are currently approved for influenza. The most widely used is oseltamivir (Tamiflu), which comes in capsule form. A newer option, baloxavir (Xofluza), requires just a single dose. Two others, peramivir and zanamivir, are used less commonly. All of these work best when started within 48 hours of symptom onset, so timing matters. If you suspect you have the flu and you’re in a higher-risk group, call your doctor quickly rather than waiting to see if you improve on your own.
Not everyone needs an antiviral. The CDC recommends them most strongly for people who are hospitalized, have severe or worsening illness, or are at higher risk for complications. Higher-risk groups include adults 65 and older, children under 5, pregnant women, and people with chronic conditions like asthma, diabetes, or heart disease. For these groups, antiviral treatment should start as soon as possible, even before a flu test confirms the diagnosis. If you’re a generally healthy adult with a mild to moderate case, antivirals are optional but can still shorten your illness by roughly a day.
Over-the-Counter Pain and Fever Relief
Fever, headaches, and body aches are the symptoms that make the flu feel so punishing. Acetaminophen (Tylenol) reduces fever and relieves pain. Ibuprofen (Advil, Motrin) does the same but also reduces inflammation, which can help with the deep muscle soreness the flu causes. Either one works well on its own. Combination products containing both are also available, typically dosed as two tablets every eight hours, with a maximum of six tablets per day for adults.
A few practical notes: don’t exceed the daily limit on acetaminophen (usually 3,000 to 4,000 mg, depending on the product), especially if you’re also taking a multi-symptom cold and flu product that already contains it. Check the active ingredients on every box. Doubling up on acetaminophen without realizing it is one of the most common medication mistakes during flu season. Children under 12 should use pediatric formulations with dosing based on weight.
Cough and Congestion Medications
Different ingredients target different symptoms, so it helps to match what you buy to what’s actually bothering you. Dextromethorphan (found in products labeled “DM”) suppresses the cough reflex and is most useful for a dry, hacking cough that keeps you awake. Guaifenesin (Mucinex) works differently: it loosens and thins mucus so your coughs become more productive, helping you clear congestion from your chest and airways. Pseudoephedrine shrinks swollen nasal passages to relieve stuffiness. It’s kept behind the pharmacy counter in most states, so you’ll need to ask for it.
If you have a productive cough that’s helping you clear mucus, a cough suppressant can actually work against you. In that case, guaifenesin alone is a better choice. Multi-symptom products bundle several of these ingredients together, which is convenient but means you may be taking medications for symptoms you don’t have. Reading the label and choosing targeted products gives you more control.
Staying Hydrated
Fever, sweating, vomiting, and diarrhea all pull fluid out of your body faster than usual. Dehydration makes fatigue, headaches, and dizziness worse, and it can slow your recovery. Water is the foundation, but electrolyte drinks help replace the sodium and potassium you lose through sweat and digestive symptoms. Herbal teas, natural juices, and clear broths also count toward your fluid intake.
Avoid alcohol, coffee, soda, and energy drinks, all of which can worsen dehydration. If vomiting makes it hard to keep liquids down, try small amounts frequently: ice chips, popsicles, or tiny sips every few minutes. Ongoing vomiting or diarrhea that lasts more than a couple of days, or symptoms that improve and then come back worse, are signs you need medical attention.
Saltwater Gargles and Honey
A saltwater gargle is one of the simplest and most effective home remedies for a sore throat. Salt draws excess water out of swollen throat tissues and creates a barrier against irritants. Mix a quarter to half teaspoon of salt into eight ounces of warm water, gargle for several seconds, swish around your mouth, and spit it out. You can repeat this several times a day. It won’t cure the flu, but it reliably takes the edge off throat pain, and you can combine it with acetaminophen or ibuprofen for stronger relief.
Honey coats and soothes an irritated throat, and some research suggests it can reduce cough frequency, particularly at night. A spoonful in warm tea does double duty: hydration plus throat relief. Don’t give honey to children under one year old due to the risk of botulism.
Supplements: Zinc, Vitamin C, and Elderberry
Zinc has the strongest evidence of the popular flu supplements. A meta-analysis of randomized trials found that zinc acetate lozenges (around 80 to 92 mg per day) shortened the duration of nasal congestion, sore throat, cough, and muscle aches during upper respiratory infections. The catch is timing: zinc works best when started within 24 hours of your first symptoms. After that window, the benefit drops off significantly.
Vitamin C is less impressive. A large Cochrane review of 29 trials involving over 11,000 people found that regular vitamin C supplementation did not reduce how often people got sick. It was associated with modestly shorter symptom duration, but the effect was small, and studies using vitamin C as a treatment (taken after symptoms started) were even less convincing.
Elderberry sits somewhere in between. A 2019 meta-analysis of four studies found that black elderberry supplements significantly reduced the duration and severity of upper respiratory symptoms compared to placebo. However, a 2020 review noted that the overall body of evidence is still limited, with too few high-quality clinical trials to draw firm conclusions. It’s likely safe for most adults, but it’s not a substitute for proven treatments.
Warning Signs That Need Emergency Care
Most flu cases resolve within one to two weeks, but certain symptoms signal that something more serious is happening. In adults, seek emergency care for difficulty breathing, persistent chest or abdominal pain, confusion or inability to stay alert, seizures, not urinating, severe weakness, or a fever or cough that improves and then returns worse than before.
In children, the red flags include 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 eight hours, no tears when crying, seizures, or fever above 104°F that doesn’t respond to fever-reducing medication. Any fever in an infant under 12 weeks old warrants immediate medical evaluation, regardless of how mild it seems.