Amoxicillin: Uses, Dosage, Precautions, and Side Effects

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Amoxicillin is one of the most commonly prescribed antibiotics used to treat bacterial infections. Manufactured by Brown & Burk UK Limited, this medicine belongs to the penicillin group of antibiotics and works by eliminating bacteria responsible for various infections throughout the body.

 

What Amoxicillin Is and What It’s Used For

Amoxicillin is an antibiotic medicine that treats a range of bacterial infections affecting the ears, throat, urinary tract, skin, and respiratory system. It may also be used in combination with other medicines to treat stomach ulcers caused by Helicobacter pylori bacteria.

 

Before Taking Amoxicillin: Important Precautions

You should not take Amoxicillin if:

  • You are allergic to amoxicillin, penicillin, or any of the ingredients in the medicine.
  • You have ever had an allergic reaction to any antibiotic, such as skin rash, swelling, or difficulty breathing.

Warnings and Precautions

Consult your healthcare professional before taking Amoxicillin if you:

  • Have glandular fever (sore throat, fever, and swollen glands).
  • Have kidney problems or difficulty urinating.

Interaction with Other Medicines

Inform your doctor if you are taking:

  • Allopurinol (for gout) – may increase the risk of allergic skin reactions.
  • Probenecid (for gout) – can reduce Amoxicillin excretion.
  • Warfarin (blood thinner) – may require additional blood tests.
  • Tetracycline antibiotics – can reduce Amoxicillin’s effectiveness.
  • Methotrexate – Amoxicillin may increase its side effects.

Pregnancy, Breastfeeding, and Driving

Amoxicillin can be used during pregnancy and breastfeeding under medical supervision. However, if you experience side effects such as dizziness or convulsions, avoid driving or operating machinery until you feel better.

 

How to Take Amoxicillin

Always take Amoxicillin exactly as prescribed by your healthcare professional. It can be taken before, during, or after meals with a glass of water.

Dosage Guidelines

Children (below 40 kg)

  • Dose is based on body weight: 40–90 mg/kg per day, divided into 2 or 3 doses.
  • Maximum dose: 100 mg/kg per day.

Adults and Children (40 kg or more)

  • 250–500 mg three times daily or 750 mg–1 g every 12 hours.
  • For severe infections: up to 1 g three times daily.
  • For urinary tract infections: 3 g twice daily for one day.
  • For Lyme disease: up to 6 g per day depending on severity.
  • For stomach ulcers: 750 mg–1 g twice daily for 7 days with other ulcer medications.
  • Maximum daily dose: 6 g per day.

If you have kidney problems, your doctor may adjust your dose accordingly.

Missed Dose or Overdose

  • If you miss a dose, take it as soon as you remember, but wait 4 hours before the next one.
  • Do not double doses.
  • In case of overdose, contact your doctor immediately. Symptoms may include nausea, vomiting, diarrhoea, or cloudy urine.

Continue taking Amoxicillin for the full prescribed duration, even if you feel better. Stopping too early may allow bacteria to return.

 

Possible Side Effects of Amoxicillin

Like all medicines, Amoxicillin can cause side effects, although not everyone gets them.

Serious Side Effects (Seek Immediate Help)

  • Severe allergic reactions: rash, swelling, or difficulty breathing.
  • Skin reactions such as blisters, peeling, or redness.
  • Liver problems: yellowing of skin or eyes, dark urine, pale stools.
  • Severe diarrhoea (possibly with blood).
  • Flu-like symptoms with rash and fever (possible DRESS reaction).

Common Side Effects

  • Skin rash
  • Nausea or diarrhoea

Uncommon and Rare Side Effects

  • Vomiting, dizziness, thrush (yeast infection), kidney issues
  • Convulsions (in high doses or kidney problems)
  • Discoloration of the tongue or changes in blood cell counts

If you experience any unusual symptoms, stop the medication and contact your healthcare professional immediately.

 

How to Store Amoxicillin

  • Keep out of reach of children.
  • Store in a dry place at room temperature.
  • Do not use after the expiry date mentioned on the carton.
  • Dispose of unused medicine properly — do not throw it into household waste.

 

Final Advice

Amoxicillin is a highly effective antibiotic when used correctly under medical supervision. Always follow your doctor’s instructions, complete the prescribed course, and promptly report any side effects. If you experience allergies or persistent symptoms, seek professional medical advice immediately.



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