How to Get Antibiotics for a Sinus Infection: When You Need Them, Fastest Options & Cost (2026)
Stuffed up, face aching, a week in and no better. Is it time for antibiotics? Usually not yet, but sometimes yes. Here are the three patterns doctors look for, the fastest and cheapest ways to get seen, what the guideline antibiotics cost, and what actually helps while you wait.
- Updated Oct 9, 2026
- Drug prices checked Aug 17, 2026
- 15 cited sources
- No paid placements
On this page 11 sections
Quick answer
Most sinus infections don't need antibiotics. The CDC says 90–98% are viral. Doctors prescribe when symptoms last more than 10 days without improving, start severe (fever of 102°F or higher plus thick discharge or face pain for 3–4 days), or get worse after getting better.
No test is needed, so a video or message visit online (about $29–$99) can diagnose and prescribe the same day. Retail clinics and urgent care work too.
The first-choice antibiotics are cheap: amoxicillin from $6.22 and amoxicillin-clavulanate (Augmentin) from $13.84 with a free discount card. No antibiotic for sinusitis is sold over the counter.
Do you need antibiotics for a sinus infection?
Usually not. The CDC says 90–98% of sinus infections are caused by viruses, and antibiotics don't touch viruses. Doctors look for three specific patterns before they prescribe.
What it means: a cold usually peaks in a few days and then fades. A sinus infection that hasn't improved at all by day 10 is more likely bacterial.
What it means: a fever of 102°F (39°C) or higher together with thick discharge or face pain, right from the first days, points to bacteria.
What it means: a cold that was clearing up and then turns worse suggests a bacterial infection has set in on top.
What helps: saline rinses, pain relievers and time. See what works.
Watch out: a fever lasting more than 3–4 days is a reason to get checked, per the CDC.
Criteria from the CDC's adult outpatient recommendations and the IDSA 2012 guideline. A clinician makes the diagnosis; these patterns are what they ask about.
Sinusitis leads every other diagnosis in outpatient antibiotic prescriptions. A CDC-led study in JAMA counted 56 antibiotic prescriptions for sinusitis per 1,000 Americans each year, more than ear infections (47) or sore throats (43). The same study estimated that about half of antibiotics for acute respiratory conditions may be unnecessary.Fleming-Dutra et al., JAMA 2016 (2010–2011 national ambulatory care data)
The 60-second check: antibiotics, a visit, or home care?
Answer from the top. Stop at the first "yes."
Based on the CDC (when to seek care), the IDSA guideline (bacterial patterns) and Mayo Clinic (warning signs). This tool doesn't replace a medical assessment.
Green mucus and other signs that don't mean you need antibiotics
Thick green or yellow mucus is a classic reason people ask for antibiotics, but color isn't one of the criteria. Timing and fever matter far more.
Doesn't prove a bacterial infection
- Green or yellow mucus (MedlinePlus: it doesn't mean you need antibiotics)
- Sinus pressure in the first week of a cold
- A stuffy nose and headache on day 3–5
- "Antibiotics worked last time"
- A cold that is improving, even slowly
What doctors actually weigh
- How many days, and whether it's improving at all
- Fever of 102°F (39°C) or higher, and for how long
- Getting better, then clearly worse again
- Face pain or swelling, especially on one side
- Asthma, immune problems, recent antibiotics
"Watchful waiting" is a real treatment plan
Even when sinusitis looks bacterial, the AAO-HNS guideline lets clinicians offer watchful waiting for uncomplicated cases, and the CDC describes "delayed prescribing": you leave with a prescription and fill it only if you're not better in 2–3 days. Many people never need to fill it.
Where to get a prescription for a sinus infection
Sinusitis is diagnosed from your symptoms, with no swab or scan. That makes it one of the conditions where an online visit costs the least and works as well as a clinic.
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| Route | Typical cash cost | Speed | Exam in person | Best for |
|---|---|---|---|---|
| Online message visite.g. Amazon One Medical | from $29visit only | Same day, often hours | No | A clear 10+ day history, no red flags, and you want the lowest price |
| Online video visitSesame, Teladoc, CVS Virtual Care, Doctor On Demand | $34–$99$0 copay on some plans | Often under 1 hour | No | Talking it through, evenings and weekends, using a telehealth benefit |
| Retail clinice.g. CVS MinuteClinic | ~$99–$139 | Same day | Yes | Wanting someone to look in your nose and ears without urgent-care prices |
| Urgent care | ~$150–$250 | Same day, plus wait | Yes | High fever, facial swelling, or an online visit sent you in |
| Primary care doctor | Copayor $100–$250 cash | Often 1–5 days | Yes | Repeat infections, asthma or allergies that need a longer plan |
| ENT specialist | Specialist feereferral often needed | Days to weeks | Scope, CT | Symptoms over 12 weeks (chronic sinusitis) or several infections a year |
| Emergency room | $1,000+ | Hours | Full workup | Vision changes, eye swelling, stiff neck, confusion, severe headache |
Online prices from providers' own pages (2026). Clinic, urgent care and ER: typical 2026 cash-price ranges from published guides, which vary by location. Visit prices don't include the antibiotic (prices below). Full comparison: 10 online services compared.
Can telehealth prescribe antibiotics for a sinus infection?
Yes, and sinusitis suits telehealth better than most infections. Unlike strep or a UTI, there's no test to run: the diagnosis rests on your timeline and symptoms.
The clinician will ask the same questions an in-person doctor would. There is no "magic phrase." What gets a prescription is a history that matches the criteria, and what gets you the right decision is an accurate one. Have this ready:
- The day symptoms startedAnd whether they've improved, stayed the same, or improved then worsened
- Your highest temperature, and for how many days102°F (39°C) or higher is one of the criteria
- Where it hurtsCheeks, forehead, upper teeth; one side or both
- Antibiotics in the past monthRecent use changes the choice of drug
- Drug allergiesEspecially penicillin: it decides between Augmentin and the alternatives
- Pregnancy, asthma, immune problemsAnd every medicine you take
A no-antibiotic visit isn't a wasted visit
If you're on day 4 of a cold, an online clinician will likely recommend symptom care, not antibiotics. That follows CDC guidance. Some services don't charge, or offer free follow-up messages, if they can't treat you, so check the refund and follow-up policy before you pay.
Antibiotics for a sinus infection, and what they cost
The guideline first choices are among the cheapest antibiotics at the pharmacy: about $6–$28 for a typical package with a free discount card.
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| Antibiotic | Lowest price | Highest price | Package priced | Guideline role (adults) |
|---|---|---|---|---|
| Amoxicillin-clavulanateAugmentin | $13.84 | $27.78 | 875/125 mg × 20 tabs | First-line |
| AmoxicillinAmoxil | $6.22 | $15.73 | 500 mg × 21 caps | First-line |
| Doxycycline hyclateVibramycin | $10.11 | $25.11 | 100 mg × 14 caps | Penicillin allergy |
| LevofloxacinLevaquin | $10.21 | $30.75 | 500 mg × 10 tabs | Allergy, if no other option |
| CefdinirOmnicef | $17.80 | $29.20 | 300 mg × 20 caps | Not alone (IDSA) |
| CefuroximeCeftin | $15.91 | $27.99 | 500 mg × 14 tabs | Not alone (IDSA) |
| CefpodoximeVantin | $35.59 | $74.26 | 200 mg × 14 tabs | Not alone (IDSA) |
| AzithromycinZ-Pak | $8.93 | $25.05 | 250 mg × 6 tabs | Not recommended |
Discount-card prices across 9 US pharmacy chains, RxHelp US pharmacy price panel, Aug 17, 2026. Packages are the standard quantity priced; your prescription may differ. Roles per CDC and IDSA: second- and third-generation cephalosporins are not recommended as the only drug for empiric treatment; levofloxacin is limited by an FDA boxed warning (below). Tap a column header to sort. The clinician chooses the drug.
Free discount-card prices, RxHelp US pharmacy price panel, Aug 17, 2026. Walmart and Walmart Neighborhood Market priced the same. A 2× spread for the identical generic: ask for the cash or discount-card price before you hand over the prescription.
Z-Pak, Cipro, Keflex: why they're not the usual picks
Three of the most-searched "sinus antibiotics" aren't guideline first choices for adults. Here's why, in one line each.
| Antibiotic | What the guidelines and FDA say |
|---|---|
| AzithromycinZ-Pak, a macrolide | Not recommended. The CDC puts Streptococcus pneumoniae resistance to macrolides at about 40%, and the IDSA advises against them for sinusitis. |
| CiprofloxacinCipro, a fluoroquinolone | Last resort. Cipro's label still includes acute sinusitis, but since 2016 the FDA says to reserve fluoroquinolones for sinusitis patients with no other options, because of disabling, potentially permanent side effects on tendons, muscles, joints and nerves. The CDC and IDSA name levofloxacin and moxifloxacin for penicillin allergy, not ciprofloxacin. |
| CephalexinKeflex, a 1st-gen cephalosporin | Not among the options. Cephalexin isn't listed in the CDC or IDSA sinusitis recommendations. It's used mostly for skin infections, UTIs and as a strep alternative. |
| Sulfamethoxazole-trimethoprimBactrim | Not recommended. The IDSA advises against it for empiric sinusitis treatment because of high resistance rates. |
Sources: CDC adult outpatient recommendations; IDSA 2012 guideline (AAFP summary); FDA Drug Safety Communication (May 2016) and fluoroquinolone boxed-warning labeling (July 2016). If you were prescribed one of these, there may be a reason specific to you. Ask the prescriber rather than stopping it.
Over-the-counter help for a sinus infection (no OTC antibiotics)
There is no over-the-counter antibiotic for sinusitis in the US. The pharmacy aisle can still make the wait easier, and guidelines back some of it.
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| OTC product | Shelf price | Guideline view | What it does · watch out |
|---|---|---|---|
| Saline rinse kitsqueeze bottle or neti pot + packets | $9.04–$17.73starter kit, 5 packets | Recommended | Flushes mucus and irritants out of the nose and sinuses. Only distilled, sterile or boiled-and-cooled water (see warning) |
| Steroid nasal sprayfluticasone (Flonase), triamcinolone (Nasacort) | Variesby brand and size | Option | Reduces swelling inside the nose. Takes days to work. OTC label is for allergy symptoms |
| Pain relieversacetaminophen, ibuprofen, naproxen | Low cost | Option | Ease face pain, headache and fever. Follow label limits, especially with combination cold products |
| Decongestant sprayoxymetazoline (Afrin) | $10.10–$15.920.05%, 15 ml | Short-term only | Opens a blocked nose within minutes. Label: no more than 3 days, or congestion can rebound |
| PseudoephedrineSudafed, behind the counter | $9.96–$15.55generic, 24 tabs | Not routine | Oral decongestant. Photo ID and purchase limits by federal law. Can raise blood pressure |
| GuaifenesinMucinex | $14.40–$18.86600 mg ER × 20 | Not addressed | Thins mucus. Doesn't treat infection. Check combo products for duplicate ingredients |
| Oral phenylephrine"PE" cold products | — | Doesn't work | Sold as an oral decongestant. In 2024 the FDA proposed removing it from OTC decongestants after concluding it isn't effective by mouth |
Shelf prices: RxHelp US pharmacy price panel, OTC products at 5 chains, Aug 17, 2026. Guideline view: AAO-HNS 2015 lists pain relievers, steroid nasal sprays and saline irrigation as options for symptom relief; IDSA 2012 recommends saline irrigation and does not recommend decongestants or antihistamines as add-ons to antibiotics. Ask a pharmacist before using decongestants with high blood pressure, heart disease or glaucoma, or for children.
Never rinse your sinuses with plain tap water
The FDA warns that tap water can contain amoebas that are harmless to swallow but can survive in the nose and cause serious, in rare cases fatal, infections. Use distilled or sterile water, tap water boiled for 3–5 minutes and cooled to lukewarm (use within a day), or water from a filter designed to trap infectious organisms. Wash and dry the device after each use.
After you start antibiotics: what to expect
Expect to feel better within days, not hours. The guideline checkpoints tell you when "still sick" means call back.
- Day 0
First dose
Start as soon as you pick it up, and take it exactly as directed.
- 48–72 h
Worse? Call
IDSA: getting worse after 48–72 hours on the antibiotic calls for a different plan.
- Day 3–5
Not better? Call
No improvement after 3–5 days is the other IDSA checkpoint. AAO-HNS says reassess by day 7.
- Day 5–7
Course ends
Typical adult course: 5–7 days (IDSA) or 5–10 days (AAO-HNS). Children: 10–14 days.
Acute sinusitis
Up to 4 weeks
- Usually follows a cold
- Mostly viral; sometimes bacterial
- Diagnosed from symptoms, often online
- Short antibiotic course if bacterial
Chronic sinusitis
12 weeks or more
- Inflammation that doesn't clear
- Needs objective confirmation: nasal exam, endoscopy or CT
- Saline and steroid sprays are the mainstay
- An ENT should be involved, not a quick online visit
Definitions: MedlinePlus and the AAO-HNS 2015 guideline. "21-day antibiotics" searches usually involve chronic sinusitis, which is managed by a specialist.
When a sinus infection is an emergency
Rarely, a sinus infection spreads to the eye socket or brain. These signs need emergency care, not an online visit.
Go to the ER or call 911 for:
Pain, swelling or redness around the eyes · double vision or other vision changes · a stiff neck · confusion · high fever · a severe headache that OTC pain relievers don't touch. Mayo Clinic lists these as signs of a possible serious infection; the AAO-HNS's ENThealth calls spread to the eye, face or brain an emergency.
Book a regular visit (not urgent) if…
- Symptoms pass 10 days without improving
- Fever lasts more than 3–4 days
- You got better, then worse
- You've had several sinus infections this year
- Symptoms remain after finishing antibiotics
Skip the online visit and go in person if…
- Your face is swollen, especially on one side
- You have a weakened immune system
- Symptoms have lasted 12 weeks or more
- A child has high fever or looks very unwell
Sources: CDC (when to seek care), MedlinePlus (when to contact a professional), Mayo Clinic, AAO-HNS.
Frequently asked questions
When should you take antibiotics for a sinus infection?
Guidelines point to three patterns: symptoms that last more than 10 days without improving; a severe start, meaning a fever of 102°F (39°C) or higher with thick nasal discharge or facial pain for 3–4 days in a row; or symptoms that get worse again after a cold seemed to be improving. Outside those patterns, a sinus infection is most likely viral and antibiotics won't help. Even when it looks bacterial, doctors may offer to wait a few days first, because many people get better without them.
Can I get antibiotics for a sinus infection online?
Yes. Sinusitis is diagnosed from your symptoms and their timeline, not from a swab or scan, so a telehealth clinician can assess it and send a prescription to your pharmacy if it meets the criteria. Cash visits cost about $29–$99 (Amazon One Medical from $29, Sesame from $34, Teladoc and CVS Virtual Care $89). Expect a no-antibiotic answer if your symptoms are only a few days old and improving.
Can you get antibiotics for a sinus infection over the counter?
No. Every antibiotic used for sinusitis, including amoxicillin and Augmentin, needs a prescription in the US. Over-the-counter saline rinses, decongestant sprays, pain relievers and steroid nasal sprays can ease symptoms, but none of them kill bacteria. See what OTC products actually do.
What antibiotics are used for a sinus infection?
The CDC and IDSA list amoxicillin or amoxicillin-clavulanate (Augmentin) as first-line treatment for adults. For people allergic to penicillin, the options are doxycycline or a respiratory fluoroquinolone (levofloxacin or moxifloxacin). Azithromycin and other macrolides are not recommended because of high resistance. Your clinician chooses. See antibiotics for sinus infections.
How long do you take antibiotics for a sinus infection?
The IDSA guideline suggests 5 to 7 days for adults and 10 to 14 days for children. The AAO-HNS adult guideline says 5 to 10 days. Take the course exactly as prescribed.
How long do antibiotics take to work for a sinus infection?
Many people notice improvement within a few days. The IDSA guideline says to contact your clinician if you get worse after 48–72 hours on an antibiotic or haven't improved after 3–5 days, because a different treatment or another diagnosis may be needed.
Why do I feel worse after starting antibiotics for a sinus infection?
Sinus symptoms don't switch off on day one, and antibiotic side effects such as an upset stomach can add to how you feel. But getting worse after 48–72 hours on the antibiotic is a reason to call your prescriber. The IDSA guideline recommends switching strategy at that point. Vision changes, eye swelling, a stiff neck or confusion need emergency care.
Can a sinus infection go away without antibiotics?
Usually, yes. Most are viral and clear on their own, and the CDC says most sinus infections get better without antibiotics. Even bacterial ones often improve with time, which is why the AAO-HNS guideline lets doctors offer "watchful waiting" for uncomplicated cases. Saline rinses, pain relievers and steroid nasal sprays help with symptoms meanwhile.
Can I drink alcohol on antibiotics for a sinus infection?
The UK's NHS says it's unlikely that drinking alcohol in moderation will cause problems with most common antibiotics. The exceptions it names are metronidazole and tinidazole, which aren't sinus antibiotics. Alcohol can make you feel worse while you're sick, so ask your pharmacist about your specific prescription. More: can you drink alcohol on antibiotics?
Can you take antibiotics for a sinus infection while pregnant?
Some antibiotics are used in pregnancy and some are avoided. Doxycycline and fluoroquinolones, for example, are usually avoided. Tell the prescriber you're pregnant or might be; it changes the options. See antibiotics in pregnancy and breastfeeding.
Related guides
Sources
- CDC — Adult outpatient treatment recommendations: acute rhinosinusitis
- CDC — Sinus infection basics (when to seek care, symptom relief, watchful waiting)
- Chow AW et al. IDSA clinical practice guideline for acute bacterial rhinosinusitis in children and adults. Clin Infect Dis 2012;54(8):e72–e112
- AAFP — Summary of the IDSA guideline for acute bacterial rhinosinusitis (2013)
- Rosenfeld RM et al. Clinical practice guideline (update): adult sinusitis. AAO-HNS, 2015
- Fleming-Dutra KE et al. Prevalence of inappropriate antibiotic prescriptions among US ambulatory care visits. JAMA 2016;315(17):1864–1873
- FDA — Cipro (ciprofloxacin) prescribing information: boxed warning and limitation of use for acute sinusitis (2021)
- FDA — Is rinsing your sinuses with neti pots safe?
- FDA — Proposal to remove oral phenylephrine as an OTC nasal decongestant (Nov 2024)
- MedlinePlus — Sinusitis (when to contact a medical professional; acute vs. chronic)
- Mayo Clinic — Acute sinusitis: symptoms and when to see a doctor
- American Academy of Otolaryngology — Sinusitis (ENThealth)
- NHS — Antibiotics: interactions with alcohol
- Amazon One Medical — Pay-per-visit pricing
- Sesame — Sinus infection telehealth visits
How we researched this
When-to-treat criteria and antibiotic choices come from the CDC's adult outpatient treatment recommendations, the Infectious Diseases Society of America (IDSA) 2012 guideline and the American Academy of Otolaryngology (AAO-HNS) 2015 adult sinusitis guideline. Drug and OTC product prices are discount-card and shelf prices from our US pharmacy price panel (Rx: 9 chains; OTC: 5 chains; checked Aug 17, 2026). Visit costs come from providers' own pages and published 2026 price guides; confirm locally. We don't take payment from any provider or pharmacy. Methodology · Editorial policy
Last updated October 9, 2026. General education, not medical advice — a licensed clinician or pharmacist decides whether you need an antibiotic and which one.