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Home > Health tools > Drug comparison > Amoxicillin vs Keflex

Amoxicillin vs Keflex, a side effect and effectiveness comparison for a male patient aged 22

This is personalized comparison of Amoxicillin vs Keflex for a male aged 22. The study is created by eHealthMe based on reports from FDA and social media.

What are the drugs

Amoxicillin (latest outcomes from 24,141 users) has active ingredients of amoxicillin. It is often used in infection.

Keflex (latest outcomes from 5,989 users) has active ingredients of cephalexin. It is often used in infection.

On Oct, 26, 2014: 914 male patients aged 18 who take the same drugs are studied in Amoxicillin vs Keflex

Information of patient in study:

GenderAgeReason for the drug

Drugs to compare:

Amoxicillin amoxicillinnot specified
Keflex cephalexinnot specified

eHealthMe real world results:

For males aged 18 (±5):

Most common side effects:

(click on each outcome to view in-depth analysis, incl. how people recovered)
Crohn's Disease (condition that causes inflammation of the gastrointestinal tract)Inflammatory Bowel Disease
Inflammatory Bowel DiseaseIntestinal Haemorrhage (bleeding from intestine)
Colitis Ulcerative (inflammation of colon with ulcer)Gastrointestinal Disorder (functional problems of gastrointestinal tract)
Pyrexia (fever)Rectal Haemorrhage (bleeding from anus)
Colitis (inflammation of colon)Dry Skin
AnxietyColitis (inflammation of colon)
Dyspnoea (difficult or laboured respiration)Colitis Ulcerative (inflammation of colon with ulcer)
Intestinal Haemorrhage (bleeding from intestine)Lip Dry
Headache (pain in head)Back Pain

Most common side effects experienced by people in long term use:

(click on each outcome to view in-depth analysis, incl. how people recovered)
DepressionLoss Of Consciousness
Colitis Ulcerative (inflammation of colon with ulcer)Multiple Injuries
ScarPersonality Change
Dry SkinSuicide Attempt
Gastrointestinal Disorder (functional problems of gastrointestinal tract)Irritability
Emotional DistressHomicidal Ideation (thoughts about human killing another human)
Inflammatory Bowel DiseaseAnger
Crohn's Disease (condition that causes inflammation of the gastrointestinal tract)Anxiety
Sleep DisorderDepression
Arthralgia (joint pain)Aggression

Drug effectiveness:

not at allsomewhatmoderatehighvery high

How to use the study: print a copy of the study and bring it to your health teams to ensure drug risks and benefits are fully discussed and understood.

Next: study your drugs OR ask a question from Patients Like You

Drug effectiveness in real world:

Alternative drugs:

Side effects in real world:

On eHealthMe, Amoxicillin (amoxicillin) is often used to treat infection. Keflex (cephalexin) is often used to treat infection. Find out below the conditions the drugs are used for, how effective they are, and any alternative drugs that you can use to treat those same conditions.

What is the drug used for and how effective is it:

Other drugs that are used to treat the same conditions:

Recent related drug comparison:

NOTE: The study is based on active ingredients. Other drugs that have the same active ingredients are also considered.

WARNING: Please DO NOT STOP MEDICATIONS without first consulting a physician since doing so could be hazardous to your health.

DISCLAIMER: All material available on is for informational purposes only, and is not a substitute for medical advice, diagnosis, or treatment provided by a qualified healthcare provider. All information is observation-only, and has not been supported by scientific studies or clinical trials unless otherwise stated. Different individuals may respond to medication in different ways. Every effort has been made to ensure that all information is accurate, up-to-date, and complete, but no guarantee is made to that effect. The use of the eHealthMe site and its content is at your own risk.

You may report adverse side effects to the FDA at or 1-800-FDA-1088 (1-800-332-1088).

If you use this eHealthMe study on publication, please acknowledge it with a citation: study title, URL, accessed date.


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