Allegra vs. Epipen


We compare the side effects and drug effectiveness of Allegra and Epipen. The study is created by eHealthMe based on reports of 81,399 people who take Allegra and Epipen, and is updated regularly.

What's eHealthMe?

eHealthMe is a health data analysis company based in Mountain View, California. eHealthMe monitors and analyzes the outcomes of drugs and supplements that are currently on the market. The results are readily available to health care professionals and consumers.

eHealthMe has released original studies on market drugs and worked with leading universities and institutions such as IBM, London Health Science Centre, Mayo Clinic, Northwestern University and VA. eHealthMe studies have now been referenced in over 500 peer-reviewed medical publications.

How we gather our data?

Healthcare data is obtained from a number of sources including the Food and Drug Administration (FDA). This information is aggregated and used to produce personalized reports that patients can reference.

The information that eHealthMe collects includes:

  • Side effects (including severity and how people recover from them)
  • Associated conditions or symptoms
  • Drug effectiveness
  • Demographic data regarding drug use

How the study uses the data?

The study is based on fexofenadine hydrochloride and epinephrine (the active ingredients of Allegra and Epipen, respectively). Other drugs that have the same active ingredients (e.g. generic drugs or brand names) are also considered.

What is Allegra?

Allegra has active ingredients of fexofenadine hydrochloride. It is often used in allergies. (latest outcomes from Allegra 53,163 users)

What is Epipen?

Epipen has active ingredients of epinephrine. It is often used in allergies. (latest outcomes from Epipen 14,867 users)

How to use the study?

Patients can bring a copy of the report to their healthcare provider to ensure that all drug risks and benefits are fully discussed and understood. It is recommended that patients use the information presented as a part of a broader decision-making process.

On Feb, 19, 2019

81,399 people who take Allegra and Epipen are studied.

Number of reports submitted per year:

Allegra vs Epipen drug comparison reports.

Drugs in this study:

  • Allegra (fexofenadine hydrochloride)
  • Epipen (epinephrine)

Most common side effects:

  1. Drug Ineffective
  2. Headache (pain in head)
  3. Sinusitis (inflammation of sinus)
  4. Dyspnoea (difficult or laboured respiration)
  5. Device Failure
  6. Nausea (feeling of having an urge to vomit)
  7. Fatigue (feeling of tiredness)
  8. Pain
  9. Accidental Exposure
  10. Vomiting
  1. Drug Ineffective
  2. Nausea (feeling of having an urge to vomit)
  3. Dyspnoea (difficult or laboured respiration)
  4. Headache (pain in head)
  5. Fatigue (feeling of tiredness)
  6. Dizziness
  7. Pain
  8. Diarrhoea
  9. Insomnia (sleeplessness)
  10. Anxiety

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

  1. Anxiety
  2. Emotional Distress
  3. Nervousness
  4. Pain
  5. Diabetes Mellitus (diabetes, caused by a deficiency of the pancreatic hormone insulin)
  6. Cholelithiasis (the presence or formation of gallstones in the gallbladder or bile ducts)
  7. Pulse
  8. Depression
  9. Abdominal Pain Upper
  10. Acne (skin problems that cause pimples)
  1. Anxiety
  2. Depression
  3. Back Pain
  4. Fatigue (feeling of tiredness)
  5. Pain
  6. Dizziness
  7. Fall
  8. Nausea (feeling of having an urge to vomit)
  9. Arthralgia (joint pain)
  10. Headache (pain in head)

Drug effectiveness:

  • not at all: 1.69 %
  • somewhat: 16.95 %
  • moderate: 22.03 %
  • high: 28.81 %
  • very high: 30.51 %
  • not at all: 2.76 %
  • somewhat: 21.44 %
  • moderate: 36.56 %
  • high: 30.01 %
  • very high: 9.23 %

Do you take Allegra or Epipen?

You are not alone:

Related studies:

Compare Allegra with similar drugs
Compare Epipen with similar drugs

Recent updates

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Recent personal studies

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.