What Are the Side Effects to Amoxicillin Antibiotic?

Written by jessica lietz
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Your doctor may prescribe amoxicillin for you or your child due to illnesses such as infections of the ear or urinary tract, stomach ulcers and sexually transmitted diseases such as gonorrhoea. Side effects include digestive problems, fungal growth and organ damage. Consider this information from drugs.com and the Mayo Clinic about the side effects of the antibiotic amoxicillin.


Experiencing diarrhoea while you take amoxicillin is the most common side effect, although if your diarrhoea is bloody, urgent medical care is needed.

Yeast Infection

Amoxicillin may kill off the good bacteria in your system that keep fungi and yeast growth low, resulting in vaginal yeast infections in girls and women.

Black Tongue

You may get a black, hairy looking tongue while taking amoxicillin as a result of fungal growth in your mouth.

Skin Rashes

Amoxicillin may cause you to get a skin rash that can include redness, swelling and the formation of pus-filled lesions.

Tooth Discoloration

If your child is taking amoxicillin, discolouration of the teeth is a common side effect that can be resolved by a dental cleaning.

Liver Damage

You may develop drug-induced liver damage from taking amoxicillin, with symptoms such as jaundice, nausea or vomiting, dark urine and elevated liver function tests.

Decreased Contraceptive Effectiveness

If you are taking oral contraceptives, amoxicillin can reduce their effectiveness, and you could get pregnant.

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