Reviewed for Medicine Finder users in the United States. This page is for education only and is not a prescription or diagnosis.
Learn what amoxicillin treats, why it does not work for viral colds, and what side effects or allergy signs need medical help.
Amoxicillin is a prescription antibiotic. It treats infections caused by certain bacteria. It does not work for colds, flu, or other viral infections.
Safety note. Never share antibiotics. Take amoxicillin only when it is prescribed for you.
Doctors may prescribe amoxicillin for some ear infections, sinus infections, throat infections, chest infections, skin infections, urinary tract infections, and dental infections. It may also be used with other medicines for certain stomach ulcer bacteria.
The right antibiotic depends on the infection, your allergy history, local resistance patterns, and your health record. That is why a leftover bottle from last year is a bad plan.
Amoxicillin is in the penicillin family. It fights bacteria by stopping their growth. It will not help a virus, so it will not shorten a regular cold or flu.
Take it exactly as your prescriber tells you. Do not stop early just because you feel better unless your doctor says to stop. Stopping too soon can let the infection come back.
Tell your doctor if you have ever had an allergy to penicillin, amoxicillin, or cephalosporin antibiotics. Also mention kidney disease, mononucleosis, pregnancy, breastfeeding, and all medicines or supplements you take.
Common side effects can include nausea, diarrhea, stomach upset, or mild rash. A serious allergy may cause hives, swelling, wheezing, tight throat, or trouble breathing. Get urgent help for those signs.
Call your doctor if diarrhea is severe, watery, bloody, or lasts after the medicine is finished. That can be a warning sign that needs care.
Check your prescription name. Medicine Finder can help you look up active ingredients and brand names before you pick up your medicine.
No. Amoxicillin treats some bacterial infections. It does not treat viral colds or flu.
Yes. Diarrhea can happen. Severe or bloody diarrhea needs medical advice.
In the United States, amoxicillin requires a prescription.
This page is for general learning. It does not replace advice from a doctor, pharmacist, or other licensed healthcare professional. Call emergency services or Poison Control right away if you think a medicine overdose or serious reaction has happened.