Bulas and Medicines 2022

Amoxicillin: what it is for, how to take it and side effects

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Amoxicillin: what it is for, how to take it and side effects
Amoxicillin: what it is for, how to take it and side effects

Amoxicillin is an antibiotic used to treat various bacterial infections, from urinary tract infections, to tonsillitis or ear infections, as it is a substance capable of eliminating different types of bacteria.

Normally amoxicillin is indicated for the treatment of:

  • Urinary infections;
  • Tonsillitis;
  • Sinusitis;
  • Vaginitis;
  • Ear infection;
  • Infection of the skin and mucous membranes;
  • Respiratory infections such as pneumonia or bronchitis.

Amoxicillin can only be purchased in conventional pharmacies with a medical prescription, with the commercial names of Amoxil, Novocilin, Velamox or Amoximed, for example.

How to take it

The dose of amoxicillin and the time of treatment vary according to the infection to be treated and, therefore, should always be indicated by the doctor. However, in most cases the general recommendations are:

For adults and children over 40 kg, the recommended dose is 250 mg orally, 3 times a day, every 8 hours. For more serious infections, your doctor may suggest increasing the dose to 500 mg 3 times a day every 8 hours or 750 mg twice a day every 12 hours.

For children weighing less than 40 kg, the recommended dose is usually 20 mg/kg/day, divided 3 times every 8 hours, or 25 mg/kg/day, divided 2 times, every 12 hours. In more serious infections, the doctor may suggest increasing the dose to 40 mg/kg/day, divided into 3 times a day, every 8 hours, or to 45 mg/kg/day, divided into 2 times, i.e. every 12 hours.

In the following table, the volumes or capsules corresponding to the recommended dosages are listed:

Dose Oral Suspension 250mg/5mL Oral Suspension 500mg/5mL 500 mg capsule
125 mg 2, 5 mL - -
250 mg 5 mL 2, 5 mL -
500 mg 10 mL 5 mL 1 capsule

If the person has a severe or recurrent purulent respiratory infection, a dose of 3g, which is equivalent to 6 capsules, every 12 hours may be recommended. To treat gonorrhea, the recommended dose is 3 g in a single dose.

In people with kidney failure, the doctor may change the dosage of the drug.

Possible side effects

Some of the side effects of amoxicillin can include diarrhea, nausea, redness and itchy skin. See how to treat diarrhea caused by the use of this antibiotic.

Does this antibiotic cut the effect of the contraceptive?

There is no clear scientific evidence on the effect of amoxicillin on the contraceptive, however, there are cases in which vomiting or diarrhea may occur, due to changes in the intestinal flora caused by the antibiotic, which may reduce the amount of hormones absorbed.

Therefore, it is advised to use other contraceptives such as condoms during treatment with amoxicillin, and for up to 28 days after the end of treatment. See which antibiotics cut the contraceptive effect.

Who should not take it

This antibiotic is contraindicated for patients with a history of allergy to beta-lactam antibiotics, such as penicillins or cephalosporins, and for patients allergic to amoxicillin or any of the components of the formula.

Also, if you are pregnant or breastfeeding, have kidney problems or conditions, or are taking other medications, you should talk to your doctor before starting treatment.

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