Amoxicillin is used to treat sinus infections. However, a doctor may delay prescribing the antibiotic if you experience a delayed onset of symptoms.
If you’re in the US and have symptoms of a sinus infection, you may benefit from the use of an antibiotic such as amoxicillin. This prescription drug is one of the most commonly prescribed drugs to treat bacterial infections.
These antibiotics have helped treat countless people and are also used to prevent blood poisoning and infection during surgery. Without them, it wouldn’t be possible to perform many complex operations.
In the meantime, you may be treated with a decongestant, steam, or a warm compress. Your doctor may also prescribe a decongestant for nasal spray, which will help relieve the pressure in your sinuses.
What is Amoxicillin?
Amoxicillin is an antibiotic that is available in a variety of forms. It can be taken as a liquid, capsule, or chewable tablet. It is usually taken once daily for twelve to eight hours, depending on the type of infection.
It is important to take the medication at the same time each day and as directed by your doctor. Do not take more than the recommended dose.
Dosage information for Amoxicillin

In order to treat a sinus infection, a person will typically take an antibiotic called amoxicillin. The dosage will depend on the type and severity of the infection.
If you’re not sure which dose is right for you, consult your doctor. You should take amoxicillin at least two to three times a day, depending on the severity of your infection.
GoodRx recommends taking 500 mg of amoxicillin every 8 hours, or 875 mg every 12 hours for 5 to 10 days. The dose may vary depending on the severity of your sinus infection.
Most cases of sinus infection are caused by viruses, but sometimes bacteria are the culprit. If you suspect you have a bacterial sinus infection, your doctor may prescribe an antibiotic, such as Augmentin or Amoxicillin.
Both of these medications will treat the infection but have different side effects. Augmentin may cause diarrhea, nausea, or vomiting.
It is important to complete the entire course of treatment while taking amoxicillin. If you miss a dose, the medication may not work as well or may cause the infection to last longer. Moreover, you risk developing a resistance to the medication.
Side effects of Amoxicillin for sinus infection
Some of the most common ones are:
- Diarrhea
- Nausea
- Skin rashes
- Vomiting
Antibiotics are one of the most commonly prescribed drugs today, but they can also have side effects, and it’s important to understand them before taking them.
In most cases, antibiotics will only be prescribed when an infection cannot be cured by other means. When you are taking antibiotics for sinus infections, be sure to discuss any side effects with your healthcare provider, as well as the risks involved with overuse.
Antibiotics are not always the best way to treat a sinus infection, and they may not be the best option for those with mild or moderate cases.
Ideally, your body should be able to fight off a sinus infection by itself without the use of antibiotics, as they can lead to antibiotic resistance. Studies have shown that around 60% to 70% of patients with sinus infections will recover without the use of antibiotics.
The National Institute of Allergy and Infectious Diseases sponsored this study that found that amoxicillin alone does not provide a clinical benefit in the majority of patients. It also found that antibiotics should not be used in the first week of a cold.
Furthermore, antibiotics are only effective against bacteria and don’t cure viruses.
Viruses that cause Sinusitis
Viruses that cause sinusitis are most common when you have an upper respiratory infection, like the common cold or flu. As stated by the National Library of Medicine, sinusitis is most often caused by rhinoviruses, influenza viruses, and parainfluenza viruses.
Viruses that cause sinusitis can also lead to meningitis, an infection of the membranes surrounding the brain and spinal cord. This infection may also spread to bones and the skin.
Viral infections of the sinuses are much less severe than bacterial sinus infections. However, they can still be uncomfortable and require antibiotic treatment.
Bacterial sinus infections can also lead to severe facial pain and thick nasal discharge. Bacterial sinus infections are less common than viral ones, but they often develop as a complication of viral sinusitis.
The symptoms of a sinus infection can last for seven to ten days, and most people recover within a week. However, some people can experience significant discomfort for three weeks or longer.
People with weakened immune systems or those with chronic conditions are more likely to experience prolonged pain and discomfort. Bacterial sinus infections are rare, but should always be evaluated if your symptoms persist for longer than ten days.

Antibiotics that treat Sinusitis
Antibiotics are a common form of treatment for infections, and are often prescribed by healthcare providers to relieve the symptoms of sinusitis.
However, there are risks associated with antibiotics, including overuse and antibiotic resistance.
The CDC estimates that approximately 30 million adults in the United States suffer from sinusitis every year. While some people simply wait for the symptoms to go away on their own, others seek medical treatment.
Generally, an antibiotic is given to treat bacterial sinusitis if it has been present for 7 days or more. In addition, if symptoms continue to worsen after the initial improvement, the infection is most likely bacterial.
Amoxicillin is recommended as the first line treatment for bacterial sinusitis (sinus infection) in most cases, but other antibiotics, such as doxycycline, levofloxacin, and moxifloxacin, are also effective.
There are some side effects associated with amoxicillin, including diarrhea, nausea, and vomiting. Augmentin can also cause allergic reactions.
Those who are allergic to penicillin should avoid using this drug. Augmentin may also cause abdominal discomfort and gassiness.
Is Augmentin the Same As Amoxicillin?
If you are suffering from a common bacterial infection, your doctor may prescribe amoxicillin. It’s a widely used antibiotic, and is often prescribed for children’s illnesses.
Its side effects are generally mild and include vaginal itching, rash, and dark or hairy tongue. Augmentin is an alternative for children who suffer from a more serious bacterial infection.
How Long to Take Amoxicillin For Sinus Infection
Although the answer to the question of how long to take amoxicillin for a sinus infection can vary from person to person, there is generally one universal rule.
The antibiotic is effective for about 7-10 days. It is usually prescribed in three or four divided doses.
You should consult your doctor if your symptoms do not improve after taking it. A physician will be able to culture the bacteria in your sinuses and determine whether it is resistant to the antibiotic.