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Home > Health tools > Drug comparison > Claritin vs Zyrtec vs Allegra

Claritin vs Zyrtec vs Allegra, a side effect and effectiveness comparison for a male patient aged 44

This is personalized comparison of Claritin vs Zyrtec vs Allegra for a male aged 44. The study is created by eHealthMe based on reports from FDA and social media.

What are the drugs

Claritin (latest outcomes from 24,187 users) has active ingredients of loratadine. It is often used in allergies.

Zyrtec (latest outcomes from 29,938 users) has active ingredients of cetirizine hydrochloride. It is often used in allergies.

Allegra (latest outcomes from 23,850 users) has active ingredients of fexofenadine hydrochloride. It is often used in allergies.

On Oct, 13, 2014: 3,072 male patients aged 39 who take the same drugs are studied in Claritin vs Zyrtec vs Allegra

Information of patient in study:

GenderAgeReason for the drug

Drugs to compare:

Claritin loratadinenot specified
Zyrtec cetirizine hydrochlorideMcneil Consumer
Allegra fexofenadine hydrochlorideSanofi Aventis Us

eHealthMe real world results:

For males aged 39 (±5):

Most common side effects:

(click on each outcome to view in-depth analysis, incl. how people recovered)
ClaritinZyrtec (Mcneil Consumer)Allegra (Sanofi Aventis Us)
DepressionFatigue (feeling of tiredness)Fatigue (feeling of tiredness)
Nausea (feeling of having an urge to vomit)DepressionHeadache (pain in head)
Insomnia (sleeplessness)Asthenia (weakness)Chest Pain
Headache (pain in head)Headache (pain in head)Nausea (feeling of having an urge to vomit)
Back PainDyspnoea (difficult or laboured respiration)Drug Ineffective
Drug IneffectiveNausea (feeling of having an urge to vomit)Dizziness
Pyrexia (fever)DizzinessDyspnoea (difficult or laboured respiration)
Asthenia (weakness)Drug IneffectiveBack Pain
AnxietyCondition AggravatedAsthenia (weakness)

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

(click on each outcome to view in-depth analysis, incl. how people recovered)
ClaritinZyrtec (Mcneil Consumer)Allegra (Sanofi Aventis Us)
Emotional DisorderAcne (skin problems that cause pimples)Anxiety
Dyskinesia (abnormality or impairment of voluntary movement)Hydronephrosis (water inside the kidney)Rotator Cuff Syndrome (a spectrum of conditions affecting the rotator cuff tendons of the shoulder)
Erection Difficulties - Age RelatedLipodystrophy (abnormal or degenerative conditions of the body's adipose tissue)Headache (pain in head)
Alanine Aminotransferase IncreasedSyncope (loss of consciousness with an inability to maintain postural tone)Blood Cholesterol Increased
DepressionInsomnia (sleeplessness)Pulmonary Embolism (blockage of the main artery of the lung)
Cardiac ArrestPerianal Fungal InfectionPleural Effusion (water on the lungs)
Hallucination, Auditory (perceiving sounds without auditory stimulus)Haematuria (presence of blood in urine)Diarrhoea
AnxietyMuscle Cramps (painful sensations caused by muscle contraction)Pneumonia
Hallucination, Visual (seeing things that aren't there)Suicide AttemptDepression
Amnesia (deficit in memory caused by brain damage, disease, or psychological trauma)Pancreatitis Acute (sudden inflammation of pancreas)Intentional Overdose

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, Claritin (loratadine) is often used to treat allergies. Zyrtec (cetirizine hydrochloride) is often used to treat allergies. Allegra (fexofenadine hydrochloride) is often used to treat allergies. 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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