Reported Reactions

Adverse event reports that FDA received

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Dehydration adverse event reports that record this term

Kind of term
MedDRA preferred term
Plain meaning
dehydration

What a report is

A report is not proof that the drug was the cause of the event.

FDA says:

Adverse event reports submitted to FDA do not undergo extensive validation or verification. Therefore, a causal relationship cannot be established between product and reactions listed in a report. While a suspected relationship may exist, it is not medically validated and should not be the sole source of information for clinical decision making or other assumptions about the safety or efficacy of a product. Additionally, it is important to remember that adverse event reports represent a small percentage of total usage numbers of a product. Common products may have a higher number of adverse events due to the higher total number of people using the product.

Source: openFDA, Drug Adverse Event Overview, section "Responsible use of the data". The site read the page on . The data have the reports that FDA received through .

FDA also says:

There is no certainty that the reported event (adverse event or medication error) was actually due to the product. FDA does not require that a causal relationship between a product and event be proven, and reports do not always contain enough detail to properly evaluate an event. The information in these reports has not been scientifically or otherwise verified as to a cause and effect relationship and cannot be used to estimate the incidence of these events.

Source: openFDA, Drug Adverse Event Overview. The site read the page on .

Do not rely on openFDA to make decisions regarding medical care. While we make every effort to ensure that data is accurate, you should assume all results are unvalidated.

Source: openFDA, Response of the drug event API (meta.disclaimer). The site read the page on .

Not medical advice. This site counts what was reported to FDA. Questions about a medicine or device belong with a pharmacist or clinician.

Reports on file

From January 2004 to June 2026, FDA received 131,234 adverse event reports that record the MedDRA preferred term Dehydration. In plain words, the term means: dehydration. The person who codes a report selects the term that agrees best with the description of the reporter.

FDA received 6,704 reports in the 12 months to June 2026 and 6,497 in the 12 months before. FDA releases FAERS data every quarter, so the newest months are not complete. They grow in later releases.

By reports in the 12 months to June 2026, this term was number 104 of 1,436 reaction terms with a page. Of the 1,332,454 drug reports that FDA received in the 12 months to June 2026, 6,704 (0.5%) record this term. Reports for patients 75 and over were 17% of the reports that record this term and 9.5% of all drug reports.

The number of people who use the product is not in the data. A count is not a rate.

MedDRA

The Medical Dictionary for Regulatory Activities. The person who codes a report selects the preferred term that agrees best with the description of the reporter. FDA does not publish the description.

Plain meaning

Dehydration. The words are from the fixed dictionary of this site. They add nothing to a report.

Data version

openFDA FAERS release of 29 Oct 2026. Reports received through 30 Jun 2026.

Drugs in these reports

The table has the 80 drug pages with 500 or more reports that record this term. The rows are in order of name. A drug page with fewer reports for this term is not in the table. The counts are the counts that the site keeps for each reaction term, and a count can be lower than the count of FDA.

FDA says:

Additionally, it is important to remember that adverse event reports represent a small percentage of total usage numbers of a product. Common products may have a higher number of adverse events due to the higher total number of people using the product.

Source: openFDA, Drug Adverse Event Overview. The site read the page on .

Importantly, the AEMS data by themselves are not an indicator of the safety profile of the drug or biologic.

Source: FDA, FDA Adverse Event Monitoring System (AEMS) Public Dashboard. Content current as of . The site read the page on .

Drugs that the reports with the term Dehydration name as a suspect product, in order of name
DrugClassReports with this term
AfinitorKinase inhibitor637
AmbrisentanEndothelin receptor antagonist527
ApixabanFactor Xa inhibitor560
AvastinVascular endothelial growth factor inhibitor818
AvonexInterferon beta1,060
BevacizumabVascular endothelial growth factor inhibitor1,145
CabometyxKinase inhibitor743
CapecitabineNucleoside metabolic inhibitor1,565
CarboplatinPlatinum-based drug2,025
CetuximabEpidermal growth factor receptor antagonist614
CisplatinPlatinum-based drug2,246
CyclophosphamideAlkylating drug1,099
DapagliflozinSodium-Glucose cotransporter 2 inhibitor765
DexamethasoneCorticosteroid1,154
Dianeal526
Dianeal Low Calcium1,136
Dianeal Low Calcium Peritoneal Dialysis Solution with Dextrose2,835
DigoxinCardiac glycoside976
DocetaxelMicrotubule inhibitor947
Doxorubicin hydrochlorideAnthracycline topoisomerase inhibitor500
DupixentInterleukin-4 receptor alpha antagonist573
EnbrelTumor necrosis factor blocker1,075
EntrestoAngiotensin 2 receptor blocker1,153
EtoposideTopoisomerase inhibitor589
ExtranealOsmotic laxative661
FluorouracilNucleoside metabolic inhibitor1,479
ForteoParathyroid hormone analog638
FurosemideLoop diuretic2,034
GemcitabineNucleoside metabolic inhibitor534
Humira4,080
HydrochlorothiazideThiazide diuretic1,027
IbranceKinase inhibitor802
IbuprofenNonsteroidal anti-inflammatory drug556
ImbruvicaKinase inhibitor626
InvokanaSodium-Glucose cotransporter 2 inhibitor606
Irinotecan531
JardianceSodium-Glucose cotransporter 2 inhibitor903
KeytrudaProgrammed death Receptor-1 blocking antibody554
LansoprazoleProton pump inhibitor595
LasixLoop diuretic885
LenalidomideThalidomide analog517
LenvimaKinase inhibitor1,273
LisinoprilAngiotensin converting enzyme inhibitor701
Lyrica537
MetforminBiguanide1,374
MethotrexateFolate analog metabolic inhibitor961
MounjaroGLP-1 receptor agonist1,282
NaproxenNonsteroidal anti-inflammatory drug505
NivolumabProgrammed death Receptor-1 blocking antibody648
OfevKinase inhibitor654
OmeprazoleProton pump inhibitor503
OpsumitEndothelin receptor antagonist533
OxaliplatinPlatinum-based drug1,335
OzempicGLP-1 receptor agonist1,652
PaclitaxelMicrotubule inhibitor1,020
Peg-Intron631
PegasysInterferon alpha546
PomalystThalidomide analog678
PrednisoneCorticosteroid1,316
RamiprilAngiotensin converting enzyme inhibitor1,023
RemicadeTumor necrosis factor blocker967
RemodulinProstacycline vasodilator546
RevlimidThalidomide analog3,984
RibavirinNucleoside analog antiviral920
RituximabCD20-directed cytolytic antibody929
SimvastatinHMG-CoA reductase inhibitor707
SkyriziInterleukin-23 antagonist578
SpironolactoneAldosterone antagonist941
SutentKinase inhibitor864
TacrolimusCalcineurin inhibitor immunosuppressant518
Taxol672
Tecfidera1,043
TeduglutideGLP-2 analog662
TrulicityGLP-1 receptor agonist1,038
TysabriIntegrin receptor antagonist852
VedolizumabIntegrin receptor antagonist757
VelcadeProteasome inhibitor637
XelodaNucleoside metabolic inhibitor1,041
XyremCentral nervous system depressant582
ZepboundGLP-1 receptor agonist586

The page of each drug has the count of each reaction term in its reaction lookup.

Drug classes in these reports

The table has the 45 pharmacologic classes with 1,000 or more reports that record this term. The rows are in order of name.

FDA says:

Additionally, it is important to remember that adverse event reports represent a small percentage of total usage numbers of a product. Common products may have a higher number of adverse events due to the higher total number of people using the product.

Source: openFDA, Drug Adverse Event Overview. The site read the page on .

Importantly, the AEMS data by themselves are not an indicator of the safety profile of the drug or biologic.

Source: FDA, FDA Adverse Event Monitoring System (AEMS) Public Dashboard. Content current as of . The site read the page on .

Pharmacologic classes of the drugs that the reports with the term Dehydration name, in order of name
ClassReports with this term
Aldosterone antagonist1,433
Alkylating drug1,981
Angiotensin 2 receptor blocker3,670
Angiotensin converting enzyme inhibitor2,161
Anthracycline topoisomerase inhibitor1,036
Anti-epileptic agent1,234
Atypical antipsychotic3,345
Benzodiazepine1,466
beta-Adrenergic blocker1,836
Biguanide2,317
Calcineurin inhibitor immunosuppressant1,084
Cardiac glycoside1,003
CD20-directed cytolytic antibody1,593
Corticosteroid3,871
Endothelin receptor antagonist1,999
Epidermal growth factor receptor antagonist1,366
Factor Xa inhibitor1,314
Folate analog metabolic inhibitor1,736
GLP-1 receptor agonist6,536
HER2/neu receptor antagonist1,228
HMG-CoA reductase inhibitor1,649
Insulin analog1,439
Integrin receptor antagonist1,767
Interferon beta1,593
Janus kinase inhibitor1,297
Kinase inhibitor14,000
Loop diuretic3,528
Microtubule inhibitor2,307
Nonsteroidal anti-inflammatory drug2,489
Nucleoside analog antiviral1,242
Nucleoside metabolic inhibitor5,456
Opioid agonist2,258
Osmotic laxative1,647
Platinum-based drug5,606
Programmed death Receptor-1 blocking antibody2,102
Prostacycline vasodilator1,572
Proteasome inhibitor1,319
Proton pump inhibitor2,642
Serotonin reuptake inhibitor1,452
Sodium-Glucose cotransporter 2 inhibitor2,857
Thalidomide analog5,235
Thiazide diuretic1,306
Topoisomerase inhibitor1,055
Tumor necrosis factor blocker3,403
Vascular endothelial growth factor inhibitor2,084

A class with many reports in all has many reports for almost every term.

Reports by month

Reports that record Dehydration, by month, five years to June 2026
05001,00020222023202420252026

FDA releases FAERS data every quarter, so the newest months are not complete. They grow in later releases.

Patients in these reports

Age of the patient in the reports that record Dehydration
AgeReportsShareShare as a bar
Under 27550.6%
2 to 111,6561.3%
12 to 171,2400.9%
18 to 4412,3439.4%
45 to 6430,64523.4%
65 to 7421,89216.7%
75 and over22,25317%
Age not given40,45030.8%
Sex of the patient in the reports that record Dehydration
SexReportsShareShare as a bar
Female72,77855.5%
Male49,31837.6%
Unknown or not given9,1387%

Age and sex are as the report gives them. 66.3% of these reports give the United States as the country.

Terms near this one

Official pages

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Reported Reactions. Dehydration: adverse event reports that record this term. https://reportedreactions.com/reaction/dehydration/ Source: U.S. Food and Drug Administration, openFDA Drug Adverse Event (FAERS) files, release of . Reports received through .

Where the data come from

The counts come from the openFDA Drug Adverse Event (FAERS) bulk files, release of 29 Oct 2026. The files have the reports that FDA received through 30 Jun 2026. A drug name is the name on the report. The site matches it to a brand name or a generic name of the National Drug Code Directory of 2 Nov 2026. A class is the pharmacologic class (EPC) of the FDA label.

The count has the reports with each spelling of one MedDRA preferred term. The site does not publish a report narrative, a lot number, a detail of a patient or the identity of a reporter. The record of FDA is the authority. See how the site counts reports, the data sources and the corrections page.

Questions

What does Dehydration mean in an adverse event report?

In plain words: dehydration. It is a MedDRA preferred term. FDA codes the description of a reporter with the MedDRA dictionary. The openFDA files do not have the description itself, and this site does not show it.

Does a drug in the table mean that the drug was responsible for this reaction?

No. FDA says:

No individual drug is connected to any individual reaction.

Source: openFDA, Drug Adverse Event Overview. The site read the page on .

When a report lists multiple drugs and multiple reactions, there is no way to conclude from the data therein that a given drug is responsible for a given reaction.

Source: openFDA, Drug Adverse Event Overview. The site read the page on .

What does this page tell a person who has this symptom?

This page gives counts of reports. It cannot assess a person. A pharmacist or a clinician can assess a person.

If this is a medical emergency, please call 911.

Source: FDA, MedWatch Online Voluntary Reporting Form. The site read the page on .