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What is Amoxicillin?

Amoxicillin is a penicillin-type antibiotic used for treating a wide range of bacterial infections. It works by inhibiting the cell wall biosynthesis of bacteria, which stops them from multiplying and eventually kills them. The drug only works on antibacterial infections and is not recommended to treat viral infections such as common cold, flu, etc. Don’t use Amoxicillin unnecessarily, or you will end up building resistance to it, making it harder to treat future infections. Sometimes, doctors prescribe other Amoxicillin drugs to treat and prevent stomach/intestinal ulcers caused by the bacteria H. pylori.

What is Amoxicillin used for?

Amoxicillin is an FDA approved drug used for treating a broad range of infections such as:

  • Bronchitis
  • Genitourinary tract infections
  • Ear/Nose/Throat infections
  • Lower respiratory tract infections
  • Bacterial Pharyngitis
  • Pneumonia
  • Bacterial rhinosinusitis
  • Skin and skin stricture infections
  • Tonsillitis

Moreover, it is also FDA approved for off-label uses, such as treating erysipeloid (infection caused by handing fish and meat) and preventing endocarditis.

Doctors may also administer Amoxicillin alone or combine it with other drugs to treat dental infections. Amoxicillin is the first choice of doctors to cure dental infections. It is often recommended for people with hip replacements, knee replacements or other prosthetic joints undergoing dental procedures for preventing infections. Doctors may combine it with metronidazole for treating periodontitis.

CDC also approves Amoxicillin as a treatment for Lyme disease.

Common Doses of Amoxicillin

Remember to take amoxicillin dosage as prescribed by your doctor. Under no circumstances must you increase or decrease the dosage without consulting your doctor.

The recommended dose of Amoxicillin varies depending on a person’s age, type, and severity of the infection.

(Commonly prescribed Amoxicillin dosage:)

1) For lower respiratory tract

Adults or children weighing more than 40 kg: 500 mg every 8 hours or 875 mg every 12 hours

Adults or children weighing less than 40 kg: 45 mg/kg/day dose divided every 12 hours

2) Ear, nose, throat, skin, skin structure, and UTI (mild and moderate)

Adults or children weighing more than 40 kg: 500 mg every 12 hours or 250 mg every 8 hours

Adults or children weighing less than 40 kg: 25 mg/kg/day dose divided every 12 hours or 20 mg/kg/day dose split every 8 hours

3) Ear, nose, throat, skin, skin structure, and UTI (Severe)

Adults or children weighing more than 40 kg: 875 mg every 12 hours or 500 mg every 8 hours

Adults or children weighing less than 40 kg: 45 mg/kg/day dose divided every 12 hours or 40 mg/kg/day dose divided every 8 hours

4) For Severe Kidney infections

Your medical provider will adjust the dosage in case of severe infections.

  a) Pylori Infection

For triple therapy, your doctor may prescribe Amoxicillin (1 gm) with clarithromycin (500 mg) and Lansoprazole (30mg) twice a day for 14 days.

For dual therapy, your doctor may prescribe Amoxicillin (1 gm) and Lansoprazole (30mg) three times a day every 8 hours for 14 days.

5) Overdose

According to a study, a mild overdose may not be a serious concern, provided the overdose amount remains less than 250 mg/kg body weight. However, kidney disorders had been noticed in a small amount of overdosed patients.

What are the side effects of Amoxicillin?

1) Amoxicillin 500mg side effects

Some common side-effects of Amoxicillin include diarrhea, upset stomach, vomiting, headache, rash, and nausea. Meanwhile, triple therapy patients may experience diarrhea, headache, and taste perversion. Similarly, people having dual therapy may experience headaches and diarrhea.

2) Serious side-effects of Amoxicillin

Although rare, Amoxicillin may cause serious side effects such as wheezing, difficulty breathing or swallowing, rash, itching, hives, severe diarrhea; water/bloody stool with/without fever/stomach cramps, and rash.

If you experience any such side effects, you must stop the medication and seek immediate medical help.

3) Allergic Reactions

Amoxicillin may cause severe allergic reactions such as rash, swelling on the face, tongue, eyes, lips, and throat.

4) Clostridium Difficile-Associated Diarrhea (CDAD)

As an antibiotic, Amoxicillin also kills the good bacteria in the colon, which may lead to overgrowth of toxin-causing bacteria known as C. Difficile. This may occur two months after taking the antibiotics, ranging from mild to severe.



you cannot buy Amoxicillin over the counter unless you have a prescription. The drug only treats specific infections that only a doctor can diagnose.
Yes, you can consume alcohol with Amoxicillin. However, your doctor may recommend you stop taking alcohol and give your body a better chance to fight the infection. This is because alcohol can dehydrate your body, disrupt your natural sleep pattern and hinder your body’s healing ability. It would help if you did not take them with alcohol while taking Amoxicillin with other drugs like metronidazole, tinidazole, or Bactrim. It could lead to side effects such as headache, nausea, vomiting, and rapid response heart rate and flushing.
Yes, it’s safe to take Amoxicillin with over-the-counter painkillers such as paracetamol, aspirin and ibuprofen.
Yes, Amoxicillin treats a wide range of UTI, including kidney infections. Your doctor will probably recommend Amoxicillin 500 mg/ 250 mg for every 8 hours or 500 mg/875 mg for every 12 hours, depending on the severity of the infection.
It usually takes around 1 to 2 days to notice improvement for mild to moderate infections. Meanwhile, severe infections can take more than two days before you feel better. Similarly, Amoxicillin can provide relief to mild infections within one day. However, that does not mean the infection is gone. Even though you start feeling better, you must complete your prescribed dosage. Discontinuing Amoxicillin halfway could make the infection come back, and your doctor may have to recommend you a high dose as your body will build a resistance to the usual dose.
You may start feeling better within 1-2 days, depending on the severity of the infection. It usually takes 2-3 days to see a significant improvement in dental infections.
500mg is the standard dose of Amoxicillin prescribed for a large variety of infections. However, that doesn’t make it any safer than higher doses. Generally, Amoxicillin 500mg side-effects exhibit the same symptoms as any other dosage strength. However, it might differ upon patients, especially if they have taken a higher dose without a doctor’s consent.
Yes, various online pharmacies offer genuine and cheap Amoxicillin online in the UK if you have the prescription. However, make sure to buy them from a reputed dealer or pharmacy or you may end up with a fake product.
Amoxicillin is a prescription-based drug available in all major local stores. If you live far away from a pharmacy or need them at a lower price, then you can order Amoxicillin online in UK right at your doorstep.
Amoxicillin 500mg capsules are readily available in almost all pharmacies. However, if you need it delivered to your doorstep, you can order Amoxicillin in UK Online with a valid prescription.