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Review: Allegra and Zantac

This review analyzes the effectiveness and drug interactions between Allegra and Zantac. It is created by eHealthMe based on reports of 1,397 people who take the same drugs from FDA and social media, and is updated regularly.

Get connected: join a mobile support group for people who take Allegra and Zantac >>>

What are the drugs

Allegra (latest outcomes from 23,847 users) has active ingredients of fexofenadine hydrochloride. It is often used in allergies.

Zantac (latest outcomes from 35,515 users) has active ingredients of ranitidine hydrochloride. It is often used in gastroesophageal reflux disease.

On Oct, 23, 2014: 1,397 people who take Allegra, Zantac are studied

Allegra, Zantac outcomes

Drug combinations in study:
- Allegra (fexofenadine hydrochloride)
- Zantac (ranitidine hydrochloride)

Drug effectiveness over time :

< 1 month1 - 6 months6 - 12 months1 - 2 years2 - 5 years5 - 10 years10+ yearsnot specified
Allegra is effective16.67%
(1 of 6 people)
(0 of 7 people)
(0 of 2 people)
(2 of 4 people)
(7 of 9 people)
(1 of 4 people)
(1 of 2 people)
Zantac is effective25.00%
(2 of 8 people)
(2 of 9 people)
(1 of 5 people)
(2 of 5 people)
(2 of 4 people)
(0 of 2 people)
(1 of 3 people)

Most common drug interactions over time * :

< 1 month1 - 6 months6 - 12 months1 - 2 years2 - 5 years5 - 10 years10+ yearsnot specified
Abdominal PainAbdominal PainErythema MultiformeNauseaFractureDystoniaParaesthesiaDyspnoea
HypokalaemiaAspartate Aminotransferase IncreasedCholecystitis ChronicVomitingCardiac Failure CongestiveHippusWeaknessPain
Febrile NeutropeniaDizzinessLiver Function Test AbnormalHyperglycaemiaUpper Limb FracturePlatelet CountUrination - Bed WettingAnxiety
NeutropeniaDrug Exposure During PregnancyPulmonary EmbolismType 2 Diabetes MellitusOsteoporosisParaesthesiaPainful RespirationDizziness
Liver Carcinoma RupturedDyspnoeaPainPelvic Fluid CollectionRib FractureChest PainUrinary FrequencyFall
Platelet Count DecreasedLiver Function Test AbnormalDepressionPneumoniaLower Limb FractureWeaknessNausea
PyrexiaSeborrhoeic KeratosisGallbladder DisorderRespiratory FailureType 2 Diabetes MellitusSuicidal IdeationChest Pain
Aspartate Aminotransferase IncreasedDiarrhoeaMental DisorderHyponatraemiaRenal Failure ChronicFatigue
RashLiver Carcinoma RupturedInjuryIschaemiaCoronary Artery DiseaseDiarrhoea
PneumoniaHypokalaemiaDrug Exposure During PregnancyMetabolic AcidosisErythema MultiformeDepression

Drug effectiveness by gender :

Allegra is effective35.71%
(10 of 28 people)
(2 of 6 people)
Zantac is effective27.59%
(8 of 29 people)
(2 of 7 people)

Most common drug interactions by gender * :

AnxietyChest Pain
Back PainHypercholesterolaemia
Chest PainDiarrhoea

Drug effectiveness by age :

Allegra is effectiven/an/a100.00%
(1 of 1 people)
(1 of 7 people)
(3 of 10 people)
(2 of 10 people)
(3 of 23 people)
(2 of 15 people)
Zantac is effective0.00%
(0 of 1 people)
(1 of 1 people)
(0 of 7 people)
(2 of 11 people)
(3 of 10 people)
(2 of 23 people)
(2 of 15 people)

Most common drug interactions by age * :

Peritoneal EffusionInsomniaNauseaPruritusChest PainChest PainChest PainDiarrhoea
Pleural EffusionSudden DeathFatiguePainAnxietyNauseaDizzinessFall
Pelvic Fluid CollectionUnresponsive To StimuliDeep Vein ThrombosisNauseaDyspnoeaDyspnoeaNauseaDyspnoea
Pancreatitis AcuteVomitingCerebrovascular AccidentAnxietyPainDepressionPainAnxiety
PancreatitisAgitationDepressionCholecystitis ChronicDrug IneffectiveHeadacheFallBone Disorder
PneumoniaArrhythmiaBrain HerniationDyspnoeaHeadacheBack PainVomitingCough
PyrexiaAggressionBrain DeathThroat TightnessNauseaFallArthralgiaFatigue
Type 2 Diabetes MellitusDyspnoeaDrug HypersensitivityInjuryInjuryAbdominal PainBack PainMyalgia
VomitingCoughCerebral IschaemiaDrug Exposure During PregnancyUrticariaAnxietyAnxietyPain
Respiratory FailureDry ThroatDrug IneffectiveUrticariaVomitingAstheniaHeadacheChest Pain

* Some reports may have incomplete information.

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.

Do you take Allegra and Zantac?

Get connected! Join a related mobile support group:
- support group for people who take Allegra and Zantac
- support group for people who take Allegra
- support group for people who take Zantac

Comments from related studies:

  • From this study (11 months ago):

  • Flushing started Feb. 2013 with large hives. Face and neck become inflamed with burning pain, not itching. Had been on Celebrex several years ( also tried other NSAIDS including Ibuprofen, mobic and aspirin) For neck and joint pain as well as chronic plantar facitits. Episode seem less often without NSAIDS. Continue to have episodes regardless sometimes daily Although have had periods of no episodes for a week. Areas now have has permanent markings (scaring?)
    I have seen two dermatologist, family doctor, and allergist who cannot diagnose. Many lab test were within normal limits except mast cells were slightly elevated around 300. Aldactone is new Replacing HCTZ; Zantac, Allegra , and Zyrtec are new to help symptoms. Nasonex is also new . Tried topical steroid cream which was not effective. Thanks!


  • From this study (12 months ago):

  • recently diagnosed as having mild ITP


  • From this study (12 months ago):

  • speckled Rash on forearms and neck, new freckles on face


Post a new comment    OR    Read more comments

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Complete drug side effects:

On eHealthMe, Allegra (fexofenadine hydrochloride) is often used to treat allergies. Zantac (ranitidine hydrochloride) is often used to treat gastroesophageal reflux disease. 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:

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).

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