Most sinus infections are viral and don’t need antibiotics. The best medicine for the majority of cases is a combination of over-the-counter pain relievers, nasal steroid sprays, and saline rinses to manage symptoms while your body clears the infection. Antibiotics only help when a sinus infection is genuinely bacterial, which is less common than most people assume.
Most Sinus Infections Don’t Need Antibiotics
About 90% of sinus infections start with a virus, and no antibiotic will speed up recovery from a viral infection. The tricky part is that viral and bacterial sinus infections look almost identical in the first week. Thick, discolored mucus alone doesn’t mean you have a bacterial infection.
Three patterns suggest a bacterial sinus infection that may warrant antibiotics: symptoms lasting 10 days or more with no improvement, a high fever (102°F or higher) with intense facial pain and thick discharge lasting at least 3 to 4 days, or the “double sickening” pattern where you start to feel better after a cold, then suddenly get worse with new fever, headache, or increased discharge around day 5 or 6. Even among people who meet these criteria, only about 60% actually have bacteria confirmed if their sinuses are tested directly.
Over-the-Counter Pain Relievers
For the pressure and headache that make sinus infections miserable, acetaminophen (Tylenol) and ibuprofen (Advil, Motrin) both work well. Ibuprofen has the added benefit of reducing inflammation, which can help with the swelling that causes that heavy, full feeling in your face. You can alternate between the two if one alone isn’t enough, since they work through different mechanisms.
Nasal Steroid Sprays
Nasal corticosteroid sprays are one of the most effective tools for sinus infections, yet many people overlook them. These sprays reduce swelling inside the nasal passages, which helps your sinuses drain and relieves both congestion and facial pain. Products containing fluticasone (Flonase) and budesonide are available over the counter.
A meta-analysis of six trials found that steroid sprays significantly improved facial pain and congestion compared to placebo, with the benefit increasing over time. At 21 days, an additional 11 out of every 100 patients experienced symptom resolution compared to those using a placebo. That may sound modest, but when stacked on top of other treatments, it meaningfully shortens how long you feel awful. Side effects were mild across all the studies. The key is consistency: use the spray daily rather than just when symptoms flare.
Oral Decongestants: Choose Carefully
If you’re reaching for a decongestant pill, the active ingredient matters enormously. Phenylephrine, the decongestant found in most products sitting on pharmacy shelves (like the current Sudafed PE formulation), performs no better than a sugar pill. A systematic review of four studies found it consistently failed to provide meaningful relief from nasal congestion. This is largely because phenylephrine has very low bioavailability when swallowed, meaning very little of it actually reaches your bloodstream at effective levels.
Pseudoephedrine is a different story. It genuinely shrinks swollen nasal tissues and opens airways, which is why it remains behind the pharmacy counter (you’ll need to show ID to purchase it in most states). If you want an oral decongestant that actually works, ask the pharmacist for a pseudoephedrine-based product.
Decongestant nasal sprays like oxymetazoline (Afrin) provide fast, powerful relief but should not be used for more than 3 days. Longer use causes rebound congestion, where your nasal passages swell worse than before once the spray wears off.
Saline Nasal Rinses
Rinsing your sinuses with salt water physically flushes out mucus, debris, and inflammatory particles. It won’t cure an infection, but it reduces the load your sinuses are dealing with and can noticeably ease congestion. Neti pots, squeeze bottles, and pressurized saline cans all work.
The one important safety rule: never use tap water. Use distilled water from the store, or boil tap water and let it cool first. Tap water contains bacteria and, rarely, amoeba that are harmless when swallowed but dangerous when introduced directly into nasal passages. Between 1994 and 2022, 10 immunocompromised patients developed a serious amoeba infection linked to tap water nasal rinsing. Premixed saline packets (available at any pharmacy) make getting the salt concentration right easy and prevent the burning sensation that plain water causes.
When Antibiotics Are Appropriate
If your symptoms fit one of the three bacterial patterns described above, your doctor will likely prescribe amoxicillin-clavulanate as the first choice. Plain amoxicillin is also used for mild cases. A typical course runs 5 to 10 days depending on severity and how quickly you improve.
If you’re allergic to penicillin, the alternatives include doxycycline, azithromycin, or clarithromycin. These are less effective against the bacteria most commonly responsible for sinus infections, with failure rates around 20% to 25%. For moderate or recurring infections, or if you’ve taken antibiotics recently, your doctor may choose a fluoroquinolone or a combination approach to cover a broader range of bacteria.
A Practical Treatment Plan
For the first 10 days of a sinus infection, the goal is symptom management. A reasonable daily approach combines ibuprofen or acetaminophen for pain, a nasal steroid spray used consistently, saline rinses once or twice a day, and pseudoephedrine if congestion is severe. Steam from a hot shower or a bowl of hot water can also temporarily loosen thick mucus.
Staying hydrated helps thin mucus and supports your immune response. Sleeping with your head slightly elevated encourages sinus drainage and can reduce the pressure that builds overnight.
If you’re still feeling no better after 10 days, your symptoms suddenly worsen after initially improving, or you develop a high fever with severe facial pain in the first few days, those are the signals that antibiotics may be needed.
Symptoms That Need Immediate Attention
Certain symptoms signal that a sinus infection may be spreading beyond the sinuses. Seek care right away if you notice swelling or redness around your eyes, double vision or other vision changes, a stiff neck, confusion, or a very high fever. These can indicate the infection is affecting the eye socket, the brain lining, or other nearby structures, and they require urgent treatment.