Amoxicillin : What you need to know?

Research Based
Medically reviewed by - Dr. Tez Pratap Singh, MD Written by - Dr. Shilpa R


What is amoxicillin?

Amoxicillin is a type of antibiotic that is used to treat bacterial infections. Antibiotics like amoxicillin and others won’t treat viral infections like the flu, colds, or other respiratory illnesses. It ranks as one of the most regularly prescribed antibiotics in health care. It is routinely administered to children as well as adults. It can be used alone or as part of combination therapy alongside additional antibiotics and drugs.

The way it works, its health advantages, dosage, adverse reactions, risks, and interactions with other drugs are all discussed in this article.

Amoxicillin is a type of antibiotic that is used to treat bacterial infections.

Key Facts

Key facts about amoxicillin

  • Amoxicillin is one of the essential drugs in the World Health Organization’s list of essential medicines.1Key facts| Researched based study from
  • It belongs to a class of drugs called penicillin antibiotics.
  • Amoxil, Sumox, Moxilin, and Trimox are familiar brand names.
  • Amoxicillin is available in various forms like chewable tablets, liquid suspension and powder for suspension, capsules, and extended-release tablets.
  • They are also available as injectables but should only be given in a hospital setup.

How does it work?

  • It destroys bacteria by disrupting its cell wall.
  • It kills the germs and stops their growth.
  • Their effectiveness depends more on when the drug is taken than the dosage.2Key facts| Researched based study from
  • Oral tablets begin acting immediately after a dose is taken.
  • It may take several days after the initial dose for the medicine to begin reducing the infection’s symptoms.


Recommended dose of amoxicillin

For bacterial infections

In newborns and infants

  • Three months and younger – usually 30 mg/kg body weight per day, divided and given every 12 hours.3Dosage| Researched based study from

In children

  • More than three months – 20 to 45 mg/kg/day in divided doses every 8-12 hours.

In adults

  • 750 to 1750 mg/day, divided into multiple doses given every 8-12 hours.2Dosage| Researched based study from

Dosage may vary depending on the individual’s body weight, age, and the infection to be treated. And the doctor should make the decision.

How to use it?

  • It is frequently consumed by mouth every twelve hours (twice per day) or every eight hours (thrice per day).
  • It is suitable for use with or without meals. If it upsets the stomach, take it with meals.4Dosage| Researched based study from
  • Taking this antibiotic at regular intervals and at the same time every day will give the best results.
  • Avoid missing doses in between.
  • Even if one starts to feel better, keep taking the medication until one finishes the whole prescription course.

What to do if a dose is missed?

  • As soon as you recall, take the missed dose.
  • If it is time for the next dose, forget the missed one and take the following one.
  • Please refrain from taking extra or double doses to make up for missing ones.4Dosage| Researched based study from


Uses of amoxicillin

Amoxicillin is prescribed for the following conditions

  • Treats Helicobacter pylori infection.
  • Treats infections of the ears, nose, and throat.
  • Helps to reduce bacterial sinusitis.
  • Treats urinary tract infections (UTIs).
  • Treats infections in the lower respiratory tract.
  • Treats bacterial skin infections.
  • Used to treat dental infections.
  • Protects against infected endocarditis.
  • It is used to treat Lyme disease.
  • Protects against anthrax infection following exposure.

Treats Helicobacter pylori infection

  • Amoxicillin helps remove H. pylori and is indicated in patients with proven peptic ulcers. It is used in a dual treatment with lansoprazole or triple therapy with clarithromycin and lansoprazole5Uses| Researched based study from

Treats infections of the ears, throat, and nose

  • Like bacterial pharyngitis,6Uses| Researched based study from tonsilitis and otitis media 7Uses| Researched based study from in children above twelve years and adults.

Helps to reduce bacterial sinusitis

  • Amoxicillin is given alone or with clavulanate for treating bacterial infection of the sinuses.8Uses| Researched based study from

Aids in the treatment of Urinary tract infections (UTI)

  • The most frequent cause of UTIs is still Escherichia coli; amoxicillin-clavulanate is an excellent antibiotic to treat it.9Uses| Researched based study from

Treats lower respiratory tract infections

  • Amoxicillin can treat bacterial infections such as pneumonia and infection of the bronchial tubes leading to the lungs.10Uses| Researched based study from

Treats bacterial skin infections

  • Amoxicillin combined with clavulanic acid makes it appropriate for treating significant skin and soft tissue infections caused by multiple microorganisms.11Uses| Researched based study from

Used to treat dental infections

  • Amoxicillin can be used alone or in combination with metronidazole or clavulanate to treat infections of gums and teeth12Uses| Researched based study from

Protects against infective endocarditis

  • People with heart conditions like heart diseases from birth or the ones with prosthetic valves have an increased risk of infective endocarditis.
  • These people usually take Amoxicillin before invasive procedures in the mouth (dental) or upper respiratory tract to prevent infective endocarditis.13Uses| Researched based study from

Helps treat Lyme disease

  • The vast majority of instances of early Lyme disease are resolved with a short course of antibiotics taken orally, like doxycycline or Amoxicillin.14Uses| Researched based study from

Protects against anthrax infection following exposure

  • Amoxicillin is a second-line treatment for anthrax post-exposure prophylaxis, according to the Centers for Disease Control and Prevention (CDC)15Uses| Researched based study from

Side effects

Side effects of amoxicillin

Common side effects of taking Amoxicillin may include

  • Headache.
  • Nausea.
  • Diarrhea.
  • Vomiting2Side effects| Researched based study from

More severe side effects that may require medical help may include

  • Skin rashes
  • Hives.
  • Itching.
  • Swelling of the lips, throat, tongue, or face.
  • Skin redness, blistering, and peeling, even inside the mouth.
  • Severe diarrhea.
  • Abnormal vaginal discharge.
  • Fever, Swollen lymph nodes.
  • Yellowing of eyes and skin.
  • Abdominal pain.


Risk associated with amoxicillin

Before taking Amoxicillin, consider the following risks

  • Anaphylaxis – severe hypersensitivity reaction to Amoxicillin can happen along with low blood pressure, spasms of the upper respiratory tract, and severe itching.16Risks| Researched based study from
  • Reversible liver damage – caused by amoxicillin hypersensitivity. Most patients recover quickly after discontinuing Amoxicillin, and they recover soon after stopping Amoxicillin.
  • Antibiotic resistance – using antibiotics when they are not needed increases a person’s risk of illness later in life, as does resisting antibiotic therapy17Risks| Researched based study from
  • Penicillin can produce seizures – at large dosages, which is a worry, especially in individuals with renal failure.



  • People with a history of Amoxicillin, penicillin, cephalosporin antibiotic, or any other allergies should notify their doctor.
  • Patients need to realize that any symptoms, such as rashes, swelling of the mouth, tongue, or lips, should be reported to their doctor.16Precautions| Researched based study from
  • Older adults or those with kidney issues should use this medication cautiously because the drug is eliminated from the body via the kidneys. Any problems with this may result in excessive medicines.
  • Individuals with infectious mononucleosis shouldn’t consume Amoxicillin since it has been linked to increased skin rashes.
  • When someone is taking long-term amoxicillin therapy, their liver and kidney function should be regularly evaluated.
  • It should be remembered that Amoxicillin might generate a false positive result when evaluating for sugar or glucose in the urine.
  • A return of the infection could return if the treatment is stopped too soon and germs are given a chance to grow.


Interaction of amoxicillin with other medicines

The following drugs may interact with Amoxicillin

  • Anticoagulants or blood thinners – like warfarin and heparin, may exaggerate the risk of bleeding when used with Amoxicillin18Interactions| Researched based study from
  • Oral contraceptives or birth control pills – Consider choosing a barrier method of birth control while taking Amoxicillin. Their doctor might also give one an alternative method of birth control19Interactions| Researched based study from
  • Probenecid – combining probenecid and Amoxicillin may result in higher blood levels of the antibiotic20Interactions| Researched based study from
  • Allopurinol – if taken with Amoxicillin, one could experience a rash21Interactions| Researched based study from
Disclaimer: The user acknowledges that this article's information is being offered for informational purposes only. Every attempt has been made to guarantee that the article is informational and correct. If they have any doubts or questions about their health, we firmly advise our readers to visit a doctor or other healthcare professional.

Related Articles

subscribe drcure
subscribe drcure
Thanks for subscribing
Look out for our email. Follow our social pages