MedDRA preferred term

Affect lability: adverse event reports recording this term

9,493 reports to FDA record it, 2004–2026; 0.1% of the database.

Read first · FDA's statement on these data

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. openFDA, FDA

FDA adds: "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 "cannot be used to estimate the incidence of these events."

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.

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

9,493
reports recording the term: 0.1% of all reports; 407
reports, 12 months to June 2026: 390 in the 12 months before; 71.5%
marked serious by the reporter: 57.4% across all reports; 1.7%
record death among outcomes, as reported: 9.1% across all reports

9,493 reports in FDA's adverse event database record the MedDRA term "Affect lability": 0.1% of all reports received between January 2004 and June 2026. Coders pick the term that best matches the reporter's description.

407 reports recorded it in the 12 months to June 2026, close to the 390 of the 12 months before. FDA releases FAERS data quarterly, so the newest months are incomplete and grow in later releases. Of reports recording this term, 71.5% are marked serious, 1.7% include death among the outcomes and 22.9% include hospitalisation, as reported.

The drugs listed most often as suspect products in those reports are Cymbalta, Methotrexate and Irbesartan. That order mostly follows how many reports each drug has overall; the table also gives the term's share within each drug's own reports. FDA states that "a causal relationship cannot be established between product and reactions listed in a report" and that for any given report "there is no certainty that a suspected drug caused the event."

Reports by month, five years

FDA releases FAERS data quarterly, so the newest months are incomplete and grow in later releases.

Drugs listed as suspect products in these reports

Drug	Class	Reports with this term	Share of the drug's own reports
Cymbalta	Serotonin and norepinephrine reuptake inhibitor	2,506	4.8%
Methotrexate	Folate analog metabolic inhibitor	281	0.1%
Irbesartan	Angiotensin 2 receptor blocker	279	2.8%
Januvia	Dipeptidyl peptidase 4 inhibitor	257	0.9%
Lipitor	HMG-CoA reductase inhibitor	249	0.5%
Prednisone	Corticosteroid	245	0.1%
Cosentyx	Interleukin-17A antagonist	206	0.1%
Metformin	Biguanide	202	0.3%
Acetaminophen	Nonsteroidal anti-inflammatory drug	197	0.2%
Aspirin	Nonsteroidal anti-inflammatory drug	192	0.3%
Rituximab	CD20-directed cytolytic antibody	192	0.1%
Ergocalciferol	Provitamin D2 compound	183	1.8%
Bisoprolol	beta-Adrenergic blocker	181	0.8%
Gliclazide	—	181	3.3%
Amlodipine	Calcium channel blocker	173	0.3%
Gravol	Histamine-1 receptor antagonist	173	17.9%
Amlodipine besylate	Dihydropyridine calcium channel blocker	166	1.4%
Aliskiren hemifumarate	Renin inhibitor	165	67.6%
Prochlorperazine	Phenothiazine	163	9.1%
Lisinopril	Angiotensin converting enzyme inhibitor	161	0.4%
Calcium carbonate	Blood coagulation factor	155	1.8%
Altace	—	150	4.6%
Aliskiren	Renin inhibitor	149	8%
Methylprednisolone sodium succinate	Corticosteroid	149	1.4%
Synthroid	l-Thyroxine	140	0.5%

Drugs with a page on this site, ordered by the number of their reports recording this term. The last column is the term's share within that drug's own reports, against 0.1% across the whole database. FDA states that adverse event reports "represent a small percentage of total usage numbers of a product", that "common products may have a higher number of adverse events due to the higher total number of people using the product", and that the data "by themselves are not an indicator of the safety profile of the drug or biologic."

By pharmacologic class

Class	Reports with this term	Share of class reports	Median drug in class
Serotonin and norepinephrine reuptake inhibitor	2,748	1.6%	0.2%
Atypical antipsychotic	755	0.1%	0.1%
Angiotensin 2 receptor blocker	607	0.2%	0%
Corticosteroid	553	0.1%	0%
Opioid agonist	536	0.1%	0%
Proton pump inhibitor	517	0.1%	0%
Nonsteroidal anti-inflammatory drug	514	0.1%	0%
Serotonin reuptake inhibitor	454	0.2%	0.1%
Histamine-1 receptor antagonist	369	0.3%	0%
Angiotensin converting enzyme inhibitor	363	0.4%	0%

Classes ordered by count. Class shares follow the class's overall report volume as much as anything else.

Patients in these reports

Patient age

Under 20.1%12

2 to 114.8%453

12 to 172.9%278

18 to 4419.2%1,824

45 to 6417.5%1,659

65 to 745.6%529

75 and over2.7%253

Age not given47.2%4,485

Patient sex

Female60.5%5,741

Male26.6%2,527

Not given12.9%1,225

Grey bar: all 20,646,523 reports in the database. 66.1% of these reports give the United States as the country.

Questions about "Affect lability"

What does "Affect lability" mean in an adverse event report?

It is a MedDRA preferred term, the dictionary FDA uses to code what a reporter described. The report's own description is not published by openFDA and is not shown here.

How many reports record affect lability?

9,493 reports through June 2026 (0.1% of all reports), 407 of them in the latest 12 months.

Which drugs appear most often in these reports?

Cymbalta (2,506), Methotrexate (281), Irbesartan (279), Januvia (257) and Lipitor (249). Drugs with many reports overall lead almost every term's list. FDA states that adverse event reports "represent a small percentage of total usage numbers of a product", that "common products may have a higher number of adverse events due to the higher total number of people using the product", and that the data "by themselves are not an indicator of the safety profile of the drug or biologic."

Does a drug appearing here mean it was responsible for this reaction?

No. FDA states that "a causal relationship cannot be established between product and reactions listed in a report" and that for any given report "there is no certainty that a suspected drug caused the event."

I have this symptom. What should I do?

This site cannot assess anyone. A pharmacist or clinician can; for an emergency, call the local emergency number. Nothing on this page is medical advice.

Where this comes from. Counts are built from the openFDA Drug Adverse Event (FAERS) bulk export released 28 Sep 2026, which holds reports FDA received through 30 Jun 2026. Drug names are as reported, resolved to the brand or generic name on the FDA label where openFDA's harmonisation matched them; classes are the pharmacologic class (EPC) from the label and the National Drug Code Directory of 17 Sep 2026. Terms are pooled across spelling and capitalisation variants of one MedDRA preferred term. No report narrative, lot number, patient detail or reporter identity is published. See the methodology and sources; FDA's record is authoritative, and corrections are handled within five working days.

Drug data (FAERS) through 30 Jun 2026; device data (MAUDE) through 31 Aug 2026. Not medical advice.