Most sinus infections are viral and clear up on their own, so the medicines that help most are the ones that control your symptoms while your body fights the infection. About 46% of people recover within one week without antibiotics, and 64% recover within two weeks. Antibiotics only help when a sinus infection is bacterial, which is less common than most people assume. Here’s what actually works, what doesn’t, and when you need something stronger.
Most Sinus Infections Don’t Need Antibiotics
The vast majority of sinus infections start with a cold virus. Thick, discolored mucus alone doesn’t mean you have a bacterial infection. A bacterial sinus infection is typically diagnosed when symptoms persist for at least 10 days with no improvement, or when you experience “double sickening,” meaning you start to feel better and then suddenly get worse again. Fever above 100.4°F, pain concentrated on one side of the face, and upper tooth pain are also signs pointing toward a bacterial cause.
If your sinus infection does turn out to be bacterial, the first-line antibiotic is amoxicillin-clavulanate. Adults usually take it for five to seven days. Your doctor may prescribe a higher dose if you’ve used antibiotics recently, are over 65, or are immunocompromised. But for the first week or so of a typical sinus infection, symptom relief is the main strategy.
Pain Relievers for Facial Pressure
Sinus pressure and facial pain are often the most miserable part of a sinus infection. Both acetaminophen (Tylenol) and ibuprofen (Advil, Motrin) work well here. Ibuprofen has the added benefit of reducing inflammation, which can help with the swelling in your sinus passages. Adults can take up to 1,000 mg of acetaminophen per dose (no more than 4,000 mg in 24 hours) or 800 to 1,200 mg of ibuprofen per day for minor pain. Leave at least four hours between acetaminophen doses.
The Right Decongestant Matters
This is where many people waste money. There are two common oral decongestants on store shelves, and one of them doesn’t work.
Phenylephrine, the decongestant found in most “PE” cold products sitting on open shelves, is no more effective than a placebo. Your gut breaks it down so aggressively that only about 3% of the dose makes it into your system unchanged. In September 2023, an FDA advisory committee officially concluded that current data does not support phenylephrine’s effectiveness as a nasal decongestant.
Pseudoephedrine (Sudafed) is the one that actually works. Nearly 100% of the dose reaches your bloodstream. It narrows swollen blood vessels in your nasal passages, and nasal blood vessels are about five times more sensitive to this effect than blood vessels elsewhere, which is why it relieves congestion at low doses without major side effects. You’ll need to ask for it at the pharmacy counter (it’s kept behind the counter in most states), but you don’t need a prescription.
Nasal Decongestant Sprays: Effective but Short-Term
Sprays containing oxymetazoline (Afrin) provide fast, dramatic relief from congestion. The catch is strict: do not use them for more than three consecutive days. Beyond that, the spray can cause rebound congestion, where your nasal passages swell up worse than before, creating a cycle of dependency. Use these sprays as a short bridge for your worst days, not as a daily solution.
Nasal Steroid Sprays Reduce Swelling
Over-the-counter nasal steroid sprays like fluticasone (Flonase) and triamcinolone (Nasacort) work by dialing down the inflammatory chemicals your nasal tissue produces. They suppress the release of molecules that drive swelling, which gradually opens your sinus passages and lets mucus drain. Unlike decongestant sprays, steroid sprays are safe for longer-term use and don’t cause rebound congestion.
The tradeoff is patience. Steroid sprays don’t provide instant relief the way a decongestant spray does. You may notice some improvement within a few days, but their full benefit builds over consistent daily use. If you get frequent sinus infections or have ongoing nasal inflammation, these sprays are often the most effective long-term tool.
Saline Rinses Flush Out Mucus
Saline irrigation with a neti pot, squeeze bottle, or sinus rinse kit physically washes mucus, bacteria, and inflammatory debris out of your sinuses. It’s one of the most consistently recommended treatments for sinus infections of any type, and it’s drug-free.
The one safety rule that matters: never use plain tap water. Tap water can contain amoebas and other organisms that are harmless when swallowed (stomach acid kills them) but can cause serious, even fatal infections when introduced into nasal passages. Use only distilled water, sterile water, or tap water you’ve boiled for three to five minutes and cooled to lukewarm. Boiled water should be used within 24 hours. Filters designed to trap infectious organisms also work, but they need to meet specific standards outlined by the CDC.
Antihistamines Usually Don’t Help
If your sinus infection is triggered by allergies, antihistamines make sense because they address the underlying allergic inflammation. But for a standard sinus infection caused by a cold virus, oral antihistamines like diphenhydramine (Benadryl), cetirizine (Zyrtec), and loratadine (Claritin) generally don’t provide much benefit. They can thicken mucus by drying out your nasal passages, which may actually make it harder for your sinuses to drain. Prescription antihistamine nasal sprays perform somewhat better for nasal symptoms even in non-allergic cases, but they’re not a first-choice treatment for sinus infections.
A Practical Symptom Relief Plan
For most sinus infections, the combination that provides the best relief looks like this:
- Pain and pressure: Ibuprofen or acetaminophen on a regular schedule for the first several days.
- Congestion: Pseudoephedrine (not phenylephrine) from behind the pharmacy counter, with oxymetazoline nasal spray for the first two to three days if congestion is severe.
- Mucus drainage: Saline rinses once or twice daily with distilled or boiled water.
- Ongoing inflammation: A nasal steroid spray, used daily, especially if symptoms linger or you’re prone to recurring infections.
Symptoms That Need Immediate Attention
Most sinus infections are uncomfortable but not dangerous. However, a small number can spread to nearby structures, including the eyes and brain. Go to an emergency room if you develop pain, swelling, or redness around your eyes, double vision or other vision changes, a high fever, confusion, or a stiff neck. These symptoms suggest the infection may have moved beyond the sinuses and requires urgent treatment.