Amoxicillin/Clavulanate Potassium
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Reviewed on November 19, 2025. by
Dr Alexandra Cristina Cowell
Writer & Clinical Content Reviewer
Next review due on
November 20, 2028.
Dr Alexandra Cristina Cowell

Last updated on Nov 21, 2025.

Antibiotic tablet that fights sinus infections.

Amoxicillin/Clavulanate Potassium is an antibiotic containing two active ingredients. It’s used to clear sinusitis caused by a bacterial infection.

Price checker
875mg/125mg
$129.95
  • Prices include:
    Express shipping

    2-5 day shipping by secure courier

  • Consultation + Access to our clinicians

    Ask our experts anything you like, any time you want.

  • Total
    $129.95
    Save $0.00 each order
Amoxicillin/Clavulanate Potassium Amoxicillin + Clavulanate Potassium

What is Amoxicillin/Clavulanate Potassium?

Amoxicillin/Clavulanate Potassium is an antibiotic that can destroy bacteria and help clear infections, including bacterial sinusitis.

Sinusitis can have lots of different causes, such as nasal polyps, allergies, or seasonal changes. Occasionally, it can turn into a sinus infection. Bacterial sinus infections usually cause more severe symptoms than viral ones, and need treating with antibiotics.

Who is Amoxicillin/Clavulanate Potassium for?

Amoxicillin/Clavulanate Potassium is prescribed for adults (aged 18 or over) with sinusitis caused by a bacterial infection. If you suffer from sinusitis, you might experience pain in your forehead, nose, and cheeks, as well as general congestion and post-nasal drip (when excess mucus drains down the back of your throat from your nose).

Bacterial sinusitis usually worsens these symptoms. If you have a sinus infection and your symptoms are persistent and last for over ten days, you might need a course of antibiotics to clear the infection from your system.

How does Amoxicillin/Clavulanate Potassium work?

Amoxicillin/Clavulanate Potassium combines two medications in one tablet. Amoxicillin is a penicillin antibiotic, which works by breaking down and destroying infection-causing bacteria.

Clavulanate Potassium works by stopping bacteria that are resistant to amoxicillin. This allows amoxicillin to work more effectively at clearing infections.[1]

Are there different doses of Amoxicillin/Clavulanate Potassium?

Amoxicillin/Clavulanate Potassium is available with us in one dose: 875mg of amoxicillin and 125mg of clavulanate potassium. Doses of 500mg of amoxicillin and 125mg of clavulanate potassium and 250mg of amoxicillin and 125mg of clavulanate potassium may be available in other pharmacies.

The usual routine is to take one tablet every 12 hours, for up to ten days. Your physician will let you know if they think you need to take Amoxicillin/Clavulanate Potassium for any longer than this, as more severe infections might require a longer course of treatment.

Treated trusted source:

  1. Evans, J., Hannoodee, M. and Wittler, M. (2024). Amoxicillin Clavulanate. PubMed.
Dr Alexandra Cristina Cowell
This page was medically reviewed by Dr Alexandra Cristina Cowell on November 19, 2025. Next review due on November 20, 2028.

How we source info.

When we present you with stats, data, opinion or a consensus, we’ll tell you where this came from. And we’ll only present data as clinically reliable if it’s come from a reputable source, such as a state or government-funded health body, a peer-reviewed medical journal, or a recognised analytics or data body. Read more in our editorial policy.

Amoxicillin/Clavulanate Potassium Amoxicillin + Clavulanate Potassium

How to take Amoxicillin/Clavulanate Potassium

Swallow your tablets whole with a glass of water. It’s best to take Amoxicillin/Clavulanate just before you eat, as it’s better-absorbed with food.

Try to space your doses twelve hours apart. If you miss a tablet at your usual time, take it as soon as you remember — so long as it’s not too close to your next scheduled dose. If it is, skip that dose and carry on as normal.

Dr Alexandra Cristina Cowell
This page was medically reviewed by Dr Alexandra Cristina Cowell on November 19, 2025. Next review due on November 20, 2028.

How we source info.

When we present you with stats, data, opinion or a consensus, we’ll tell you where this came from. And we’ll only present data as clinically reliable if it’s come from a reputable source, such as a state or government-funded health body, a peer-reviewed medical journal, or a recognised analytics or data body. Read more in our editorial policy.

Amoxicillin/Clavulanate Potassium Amoxicillin + Clavulanate Potassium

Amoxicillin/Clavulanate Potassium isn’t suitable for everyone, and there are some things that you need to be aware of when using it.

Here’s all the official info on it. If anything is unclear, let our clinician know, and they can talk with you about it.

Amoxicillin/Clavulanate Potassium Amoxicillin + Clavulanate Potassium

Amoxicillin/Clavulanate Potassium: FAQ

Have something specific you want to know? Search our info below, or ask our experts a question if you can’t find what you’re looking for.

Does sinusitis always need treatment like Amoxicillin/Clavulanate Potassium?

Answer:
Sinusitis only needs antibiotic treatment if you have a bacterial infection. Bacterial infections can sometimes follow viral ones, like colds. Signs to look out for include lingering symptoms, or worsening pain and facial pressure.[1]

Viral sinus infections will eventually clear up on their own with plenty of rest. If you get sinusitis symptoms often and aren’t sure why, it might be worth speaking to your doctor about what could be causing them.

How long does Amoxicillin/Clavulanate Potassium take to work?

Answer:
Your infection might show signs of clearing after a few days.

However, it’s important to take your full course of medication, even if you feel better. This is to make sure you kill off all the bacteria and stop your symptoms returning.

Do I need a prescription for Amoxicillin/Clavulanate Potassium?

Answer:
All oral antibiotics require a prescription, so you’ll need one to start taking Amoxicillin/Clavulanate Potassium. Your physician will want to make sure it’s safe for you, and that your infection is bacterial rather than viral.

What should I do if Amoxicillin/Clavulanate Potassium isn’t working?

Answer:
If you’re not seeing much improvement in your symptoms by the end of your course of medication, let your doctor know. They might want you to try a different antibiotic, or another kind of medication entirely.

If you get recurrent sinusitis that doesn’t respond to treatment, your physician might refer you to an ear, nose and throat specialist for further tests.

Can I drink alcohol while taking Amoxicillin/Clavulanate Potassium?

Answer:
The patient leaflet that comes with your tablets doesn’t mention alcohol specifically as something to avoid during treatment. But it’s best to cut back on or stop drinking alcohol while you’re taking Amoxicillin/Clavulanate Potassium. This is because it can increase your risk of side effects like headache, which can make your sinusitis symptoms worse.

Can I get Amoxicillin/Clavulanate Potassium through private health insurance?

Answer:
Treatments for sinusitis should be covered by most health insurance plans, but policies can vary between providers. For this reason, it’s worth checking before you start taking Amoxicillin/Clavulanate Potassium so you know exactly where you stand in terms of costs.

If Amoxicillin/Clavulanate Potassium isn’t included, you’ll have to pay for the tablets yourself.

Treated trusted source:

  1. Kwon, E., Hathaway, C. and Sutton, A. E. (2025) ‘Acute Sinusitis’, in StatPearls [Internet], StatPearls Publishing, Treasure Island (FL).

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