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Amoxicillin Patient Tips

How it works

Amoxicillin is a penicillin-type antibiotic that kills bacteria by breaking down their cell wall.


  • Effective against specific bacteria often responsible for causing ear, nose, or throat infections and also against helicobacter pylori (associated with stomach ulcers).
  • Usually well tolerated.


If you are between the ages of 18 and 60, take no other medication or have no other medical conditions, side effects you are more likely to experience include:

  • Nausea, vomiting, or diarrhea.
  • Allergic reactions in those allergic to penicillin.

Notes: In general, seniors or children, people with certain medical conditions (such as liver or kidney problems, heart disease, diabetes, seizures) or people who take other medications are more at risk of developing a wider range of side effects. For a complete list of all side effects, click here.

Bottom Line

Amoxicillin is a penicillin-type antibiotic that only treats infections caused by susceptible bacteria. Usually well tolerated.


  • Dial 911 if you experience any trouble breathing, swelling or tightness of the throat.
  • See your doctor if you develop prolonged or significant diarrhea or a rash.
  • Complete the course of amoxicillin as prescribed by your doctor.

Response and Effectiveness

Peak levels are reached 1-2 hours after administration; however, it may take up to 24-72 hours of regular dosing before you start to feel better.


Amoxicillin [package insert]. Revised 10/2015. Sandoz Inc. Accessed 02/2016

  • Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use amoxicillin only for the indication prescribed.

  • Disclaimer: Every effort has been made to ensure that this information is accurate, up-to-date, and complete, but no guarantee is made to that effect. Drug information contained herein may be time sensitive. This drug information does not endorse drugs, diagnose patients or recommend therapy. It is an informational resource designed as a supplement to, and not a substitute for, the expertise, skill, knowledge and judgment of healthcare practitioners. The absence of a warning for a given drug or drug combination in no way should be construed to indicate that the drug or drug combination is safe, effective or appropriate for any given patient. does not assume any responsibility for any aspect of healthcare administered with the aid of this information. The information contained herein is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. If you have questions about the drugs you are taking, check with your doctor, nurse or pharmacist.

Copyright 1996-2017 Revision Date: 2015-12-16 23:05:18