Most sinus infections are viral and clear up on their own within 7 to 10 days. What you take during that window is about managing symptoms: reducing pain, draining congestion, and staying comfortable while your body fights the infection. Antibiotics only help the small percentage of cases that turn bacterial, and even then, the right over-the-counter treatments make a real difference alongside them.
Most Sinus Infections Don’t Need Antibiotics
About 90% of sinus infections start with a virus, the same kind that causes a common cold. No antibiotic will shorten a viral infection. The typical course runs 7 to 10 days, with congestion, facial pressure, and thick nasal discharge gradually improving on their own. Your job during this stretch is symptom relief.
A bacterial sinus infection is suspected when symptoms follow one of three patterns: they last 10 days or more without any improvement, they start with a high fever (102°F or higher) along with purulent nasal discharge or facial pain for at least three consecutive days, or they initially start getting better and then suddenly worsen around day five or six. Doctors call that last pattern “double sickening.” If your symptoms fit one of those patterns, that’s when antibiotics enter the picture.
Over-the-Counter Pain Relievers
Facial pressure and sinus headaches respond well to basic pain relievers. Both acetaminophen (Tylenol) and ibuprofen (Advil, Motrin) are effective for sinus pain caused by pressure buildup in the sinus cavities. Ibuprofen has the added benefit of reducing inflammation, which can help with swelling in the nasal passages. Either one is a reasonable first choice. You can alternate them if one alone isn’t enough, since they work through different mechanisms.
Decongestants for Congestion and Pressure
Oral decongestants shrink swollen blood vessels in the nasal passages, reduce inflammation, and help thin mucus so it drains more easily. They’re best suited for cold-related sinus symptoms rather than allergy-driven ones. They provide temporary relief and won’t cure the underlying infection, but when your sinuses feel like they’re packed with cement, that temporary relief matters.
Decongestant nasal sprays (like oxymetazoline) work faster and more directly than pills, but they come with an important limit: don’t use them for more than three days. After about three days, these sprays can cause rebound congestion, a condition called rhinitis medicamentosa, where your nose becomes more blocked than it was before you started using the spray. Oral decongestants don’t carry this risk, making them the safer option for symptoms lasting more than a few days.
Nasal Steroid Sprays
Over-the-counter nasal corticosteroid sprays (like fluticasone or mometasone) are one of the most effective tools for sinus infections, and many people overlook them. These sprays reduce inflammation directly inside the nasal passages, which helps mucus drain and relieves pressure. In clinical studies, patients using nasal corticosteroids had a 73% chance of symptom resolution or improvement, compared with 66% for placebo. They also helped symptoms improve roughly three to four days faster.
One study found that nasal steroid sprays alone actually produced a small but statistically significant improvement over antibiotics alone for symptom scores. They work best when used consistently rather than as needed, and they take a day or two to reach full effect. If you’re only going to add one thing to your routine, a nasal steroid spray is probably the highest-impact choice.
Saline Nasal Irrigation
Rinsing your sinuses with salt water physically flushes out mucus, allergens, and irritants. You can use a neti pot, squeeze bottle, or bulb syringe. It’s simple, cheap, and has essentially no side effects.
The one safety rule that matters: never use plain tap water. Tap water can contain amoebas that, if they reach the brain through the nasal passages, cause nearly always fatal infections. Use water labeled “distilled” or “sterile” from a store, or boil tap water at a rolling boil for one minute (three minutes above 6,500 feet elevation) and let it cool before use. This isn’t an overblown warning. The CDC specifically recommends these precautions because the organisms responsible can grow in home water pipes and water heaters.
Antihistamines: Only If Allergies Are Involved
Antihistamines block the body’s response to allergens, which makes them the best option when sinus symptoms are triggered by allergies. If your sinus infection started after a cold or respiratory virus, antihistamines won’t do much for you and can actually thicken mucus, making drainage harder. Save them for when you know allergies are contributing to your congestion, such as during pollen season or after exposure to pet dander or dust.
When Antibiotics Are Needed
If your doctor determines you have a bacterial sinus infection, the first-line antibiotic is typically amoxicillin or amoxicillin-clavulanate. For adults without risk factors for antibiotic resistance, a standard course lasts 5 to 7 days. Children usually need a longer course of 10 to 14 days.
Your doctor may choose the amoxicillin-clavulanate combination over plain amoxicillin if you smoke, work in a healthcare setting, have close contact with daycare children, or live in an area with higher rates of resistant bacteria. For people with additional resistance risk factors, a higher dose may be prescribed. If you have a penicillin allergy, alternative antibiotics are available.
One important point: even when antibiotics are appropriate, continuing with nasal steroid sprays, saline rinses, and pain relievers alongside them leads to faster symptom relief than antibiotics alone.
Symptoms That Need Emergency Attention
Sinus infections rarely become dangerous, but the sinuses sit close to the eyes and brain, so certain complications demand immediate care. Go to the emergency room if you or your child develop swelling or bulging around the eye, vision changes, a very high fever, or a stiff neck. These can signal orbital cellulitis (an infection spreading to the eye socket) or, in rare cases, meningitis. Orbital cellulitis can cause vision loss if untreated, and it’s most common in children whose sinus infections spread to surrounding tissue.
A Practical Approach
For the first 10 days of a sinus infection, the combination that covers the most ground is a nasal corticosteroid spray used daily, saline rinses once or twice a day, and acetaminophen or ibuprofen as needed for pain. Add an oral decongestant if congestion is severe, and keep nasal decongestant sprays to three days or fewer. Skip antihistamines unless allergies are part of the picture.
If symptoms haven’t improved at all by day 10, worsen after initial improvement around day 5 or 6, or start with a high fever and severe facial pain, that’s the point to see a provider about antibiotics. Most people never reach that threshold.