Online Antibiotics for Sinus Infection:
When You Need Them and How to Get a Prescription Today

If you have been miserable with sinus pressure, a stuffy nose, and thick discharge for days, you may be wondering if you finally need antibiotics. Here is the honest answer: most sinus infections are viral and do not need antibiotics, but a meaningful minority are bacterial and absolutely do. A short telehealth visit is often the fastest way to figure out which category you fall into and, when appropriate, get a prescription sent to your pharmacy the same day. For a broader overview of sinus infection symptoms and treatment options, see our companion guide.

This page walks through how clinicians distinguish bacterial from viral sinusitis, which antibiotics are typically used, what to expect on a virtual visit, and the warning signs that mean you should skip telehealth and head straight to in-person care.

How to Tell If You Need Antibiotics for a Sinus Infection

Acute rhinosinusitis — the medical term for what most people call a sinus infection — is overwhelmingly viral at first. Studies cited by the Infectious Diseases Society of America (IDSA) and the American Academy of Family Physicians (AAFP) suggest that fewer than 1 in 10 cases of acute sinusitis are bacterial. Antibiotics do nothing for viral infections, and using them when they are not needed contributes to resistance and side effects like rash, yeast overgrowth, and C. difficile colitis.

So how do clinicians decide? Three patterns are widely accepted as suggesting bacterial sinusitis:

• The 10-day rule. Symptoms that persist for more than 10 days without any improvement are concerning for bacterial infection. A typical viral cold should be clearly improving by day 7 to 10.
• Severe onset. High fever of 102°F (39°C) or higher plus purulent (thick, colored) nasal discharge or facial pain lasting at least 3 to 4 consecutive days at the start of illness.
• Double worsening. A textbook pattern where you start to feel better after a typical cold and then get noticeably worse again — new fever, new headache, increased nasal discharge — usually 5 to 7 days in.

Other supportive findings include focal facial pain or pressure (especially over the cheeks, forehead, or behind the eyes), tooth pain in the upper jaw, decreased sense of smell, and ongoing post-nasal drip with thick discharge. Discolored mucus alone — yellow or green — does not mean you have a bacterial infection; viral infections cause colored discharge too.

Common Antibiotics Prescribed for Sinus Infections

When antibiotics are indicated, current IDSA and AAFP guidance points to a short list of first-line and alternative options. Your provider will choose based on your history, allergies, recent antibiotic use, and local resistance patterns.

• Amoxicillin-clavulanate (Augmentin) — First-line for adults and children. Typical adult dosing is 875 mg/125 mg twice daily for 5 to 7 days; children usually receive 10 to 14 days. The clavulanate component covers beta-lactamase-producing strains of Haemophilus influenzae and Moraxella catarrhalis, which is why plain amoxicillin is no longer preferred for most adults.
• Doxycycline — A common alternative for adults with a penicillin allergy. Typical dosing is 100 mg twice daily for 5 to 7 days. Avoided in pregnancy and in young children.
• Cefdinir, cefuroxime, or cefpodoxime — Oral cephalosporins used in patients who cannot tolerate amoxicillin-clavulanate but do not have a severe penicillin allergy. Course is typically 5 to 10 days.
• Levofloxacin or moxifloxacin — Fluoroquinolones reserved for treatment failure, severe disease, or patients who cannot use any of the above. These drugs carry FDA boxed warnings for tendon rupture, peripheral neuropathy, and central nervous system effects, so they are not a casual first choice.

Notably absent from the modern first-line list: azithromycin (the "Z-Pak") and trimethoprim-sulfamethoxazole. Both have high resistance rates among common sinus pathogens and are no longer recommended for routine use in acute bacterial sinusitis.

For more on what telehealth can and cannot prescribe, see our guide on can telehealth prescribe antibiotics.

How Online Sinus Infection Treatment Works

Getting evaluated for a sinus infection online takes three simple steps.

Step 1: Book Your Visit

Schedule a same-day telehealth appointment through our online booking system. Evening and weekend slots are typically available, so you do not have to wait until Monday.

Step 2: Describe Your Symptoms

During the visit, your provider will ask about the timing and pattern of your symptoms, fever, facial pain location, nasal discharge, post-nasal drip, and any prior episodes. They will also review your medical history, allergies, and current medications.

Step 3: Get a Treatment Plan

If your symptoms meet the criteria for bacterial sinusitis, your provider will send an appropriate antibiotic prescription directly to your preferred pharmacy. If your presentation looks viral, you will get a tailored supportive-care plan instead — which is the safer and more effective approach for that situation. For more on the broader process, see our guide on how to get antibiotics online.

Telehealth vs Urgent Care vs ER for Sinus Infection

Wondering where to go? For an in-depth comparison of all three settings, read telehealth vs urgent care vs ER. Here is the short version for sinus symptoms:

For the typical adult with classic sinus symptoms and no red flags, telehealth is the fastest, lowest-friction option. Urgent care and ER make more sense when imaging, IV antibiotics, or specialist evaluation are likely needed.

When You Need In-Person Care

Most sinus infections are safe to manage virtually. A small number are not. Please go to urgent care or an emergency department for any of the following:

• Vision changes — double vision, blurred vision, loss of vision, or eye pain with movement (possible orbital involvement)
• Swelling, redness, or bulging around the eye or eyelid
• Severe headache that is worse than your typical sinus pain
• Neck stiffness, confusion, or new neurological symptoms (concern for intracranial spread or meningitis)
• High fever above 103°F that does not respond to acetaminophen or ibuprofen
• Severely immunocompromised status — active chemotherapy, transplant recipient, uncontrolled diabetes, advanced HIV
• Infants and young children with persistent fever or significant facial swelling
• Repeated sinus infections (more than 4 episodes a year) that may benefit from ENT evaluation

If any of these apply, do not wait on a virtual visit. If you are unsure, a brief telehealth call can still help you triage to the right setting.

What to Expect During Your Telehealth Sinus Visit

A focused sinus visit usually takes 10 to 15 minutes. Your provider will work through a structured set of questions and observations:

• How many days have you been sick? Did you have a typical cold first?
• Have symptoms been steadily improving, getting worse, or did you start to improve and then get worse again?
• Where is the facial pain or pressure located — cheeks, forehead, between the eyes, upper teeth?
• What is your nasal discharge like? Is it clear, thick, yellow, green, or bloody?
• Any fever, chills, or night sweats? How high has your temperature been?
• Any vision changes, swelling around the eyes, severe headache, neck stiffness, or confusion?
• Allergies, current medications, recent antibiotic use, and pregnancy status if applicable.

Your provider may ask you to gently press on different parts of your face, tip your head forward to assess pressure changes, or describe what you see when you look in a mirror. While there is no nasal endoscopy on a video call, this focused history captures the same information the IDSA criteria are built around.

Will I Definitely Get Antibiotics?

Not always — and that is a feature, not a bug. If your symptoms point to a viral infection, the safest and most effective plan is supportive care, not antibiotics. Studies consistently show that antibiotics do not shorten viral upper respiratory infections, and they expose you to side effects and resistance for no benefit.

If your provider determines your case is viral or early/mild, they will typically recommend:

• Saline nasal irrigation or sprays (very effective for symptom relief)
• Intranasal corticosteroids like fluticasone for inflammation
• Decongestants short-term (no more than 3 days for topical sprays to avoid rebound)
• Acetaminophen or ibuprofen for fever and facial pain
• Hydration, rest, and humidified air
• Clear instructions on when to come back — specifically, the 10-day or "double-worsening" trigger

A provider who hands out antibiotics for every sinus complaint is not doing you a favor. Honest, guideline-based care is what protects you from unnecessary side effects and keeps these drugs working when you really need them.

How Fast Will I Feel Better?

If your provider does prescribe antibiotics for true bacterial sinusitis, most people start to notice meaningful improvement within 48 to 72 hours. Facial pressure and headache typically ease first, followed by a gradual decrease in nasal discharge and congestion over the following week.

Complete the full prescribed course even if you feel better at day 3 or 4. Stopping early can let resistant bacteria survive and rebound. If you are not noticeably better after 72 hours, or if you get worse, contact your provider — that is a signal to reassess and potentially switch antibiotics or escalate care.

If you want a broader picture of how telehealth fits into routine care, browse our full set of telehealth services.

Frequently Asked Questions