Succinylcholine adverse event reports that FDA received

Name: Reaction terms in FDA adverse event reports that name Succinylcholine
Creator: Reported Reactions
License: https://creativecommons.org/publicdomain/zero/1.0/

Name type: Generic name
Class: Depolarizing neuromuscular blocker
Also reported as: Succinylcholine /00057701/

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 2 Oct 2026. The data have the reports that FDA received through 30 Jun 2026.

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 2 Oct 2026.

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 2 Oct 2026.

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

Drug reports received through 30 Jun 2026. Device reports have a separate cutoff, 30 Sep 2026. Why a report count is not a rate.

Reports on file

From March 2004 to June 2026, FDA received 974 adverse event reports that name Succinylcholine. In these reports the drug is a suspect or interacting product.

In the same period, 748 further reports name it only as a concomitant medicine. The counts on this page do not include these reports.

FDA received 62 reports in the 12 months to June 2026 and 72 in the 12 months before. FDA releases FAERS data every quarter, so the newest months are not complete. They grow in later releases.

Of the 1,332,454 drug reports that FDA received in the 12 months to June 2026, 62 (under 0.1%) name Succinylcholine. Reports from consumers or other non-health professionals were 2.6% of the reports that name Succinylcholine and 45.8% of all drug reports.

The number of people who use the product is not in the data. A count is not a rate. A count of reports is not a count of events or of patients, because one event can have more than one report.

There are many instances of duplicative reports and some reports do not contain all the necessary information.
Source: FDA, FDA Adverse Event Monitoring System (AEMS) Public Dashboard. Content current as of 11 Mar 2026. The site read the page on 2 Oct 2026.

Suspect product

FDA records each drug in a report as suspect, concomitant or interacting. This page counts the reports in which Succinylcholine is suspect or interacting. FDA says:

Any number of the drugs may be marked as suspect if thought to be responsible for one or more of the reactions, but that information is not validated.
Source: openFDA, Drug Adverse Event Overview. The site read the page on 2 Oct 2026.

Data version

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

Since the last update

FDA says:

Many factors can influence whether or not an event will be reported, such as the time a product has been marketed and publicity about an event.
Source: openFDA, Drug Adverse Event Overview. The site read the page on 2 Oct 2026.

The information in these reports cannot be used to estimate the incidence (occurrence rates) of the events reported.
Source: FDA, FDA Adverse Event Monitoring System (AEMS) Public Dashboard. Content current as of 11 Mar 2026. The site read the page on 2 Oct 2026.

The latest update of the FDA data, recorded on 28 Oct 2026, changed no count of this page.

In April to June 2026, FDA received 20 reports that name Succinylcholine.
In January to March 2026, FDA received 9.
In April to June 2025, FDA received 28.

April to June 2026 is the latest closed quarter in the data. A closed quarter is a quarter for which the FDA files have most of the reports.

All updates Feed of updates (RSS)

Reaction lookup

These are the reaction terms that the reports record, with the number of reports for each term. Type a term or a plain word to find its count.

What this list leaves out

The table lists the 94 reaction terms that 5 or more reports record. A term with fewer than 5 reports is not in the table.

The site keeps reaction terms for 909 of the 974 reports (93.3%).

The reports of the other years are not in the counts.

So a count in the table can be lower than the count of FDA.

Find a reaction term

The table shows the first 50 of 94 terms.

Reaction terms in the reports that name Succinylcholine, most reports first
Reaction term (MedDRA) and plain meaning	Reports	Share of the 974 reports
Hyperthermia malignant	186	19.1%
Hypotensionlow blood pressure	76	7.8%
Anaphylactic shocka severe allergic reaction with collapse	69	7.1%
Drug ineffectivethe medicine did not work as expected	69	7.1%
Foetal exposure during pregnancythe unborn baby was exposed to the medicine	62	6.4%
Cardiac arrestthe heart stopped	43	4.4%
Exposure during pregnancythe medicine was taken during pregnancy	39	4%
Drug interactionan interaction between medicines	37	3.8%
Maternal exposure during pregnancythe mother took the medicine during pregnancy	36	3.7%
Rhabdomyolysismuscle breakdown	34	3.5%
Premature babya baby born early	24	2.5%
Anaphylactic reactiona severe, sudden allergic reaction	22	2.3%
Bradycardiaslow heart rate	22	2.3%
Tachycardiafast heart rate	22	2.3%
Premature delivery	21	2.2%
Off label useused for a purpose or in a way not on the label	19	2%
Hypoxialow oxygen	18	1.8%
Phrenic nerve paralysis	16	1.6%
Seizurea fit or convulsion	16	1.6%
Tracheal deviation	16	1.6%
Deaththe patient died; cause not stated by this term	15	1.5%
Hypertensionhigh blood pressure	15	1.5%
Neuromuscular block prolonged	15	1.5%
Overdosea dose above the recommended amount	15	1.5%
Condition aggravatedthe condition being treated got worse	14	1.4%
Hyperkalaemiahigh blood potassium	14	1.4%
Delayed recovery from anaesthesia	12	1.2%
Electrocardiogram ST segment elevation	12	1.2%
Maternal exposure during delivery	12	1.2%
Negative pressure pulmonary oedema	12	1.2%
Paralysis	12	1.2%
Apnoeapauses in breathing	11	1.1%
Haemodynamic instability	11	1.1%
Pulseless electrical activity	11	1.1%
Rash maculo-papulara rash of flat and raised spots	11	1.1%
Kounis syndrome	10	1%
Laryngospasm	10	1%
Left ventricular dysfunction	10	1%
Normal newborn	10	1%
Encephalopathy	9	0.9%
Loss of consciousnesspassing out	9	0.9%
Multiple organ dysfunction syndromeseveral organs failing	9	0.9%
PCO2 increased	9	0.9%
Painpain, site not specified	9	0.9%
Respiratory acidosis	9	0.9%
Allergy test negative	8	0.8%
Cardio-respiratory arrestthe heart and breathing stopped	8	0.8%
Foetal death	8	0.8%
Respiratory failurethe lungs could not supply enough oxygen	8	0.8%
Arrhythmia	7	0.7%

Download all 94 terms of Succinylcholine (CSV)

The counts add to more than 974 reports, because one report can record more than one term. FDA says:

No individual drug is connected to any individual reaction. 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 2 Oct 2026.

The CSV file has the same rows and the same limits. Its last row is a note that says so.

MedDRA term

The person who codes a report selects the preferred term that agrees best with the description of the reporter. The words under a term are the plain meaning that this site gives.

Not the label

The FDA-approved label of a product lists its adverse reactions. See the official pages at the end of this page.

Outcomes by year

The table gives the outcomes that the reporters gave, in the terms of FDA.

Outcomes in the reports that name Succinylcholine, by the year of the openFDA file that holds the report

The table continues to the right.

Year of the openFDA file	Reports	Serious	Death	Life-threatening	Hospitalization (initial or prolonged)	Disability or Permanent Damage	Congenital Anomaly/Birth Defect	Other Serious (Important Medical Events)	Not serious
2004	4	2	0	1	0	0	0	1	2
2005	5	4	0	2	0	0	0	2	1
2006	4	4	0	0	2	1	0	2	0
2009	14	13	2	4	7	1	0	4	1
2010	5	5	0	1	3	0	0	3	0
2011	2	2	0	1	1	0	0	1	0
2012	9	8	1	4	4	0	0	3	1
2013	39	32	7	2	7	1	0	22	7
2014	179	173	9	8	18	0	0	152	6
2015	35	32	4	3	6	1	0	19	3
2016	34	30	1	3	17	0	0	23	4
2017	41	38	0	14	17	0	0	27	3
2018	39	34	1	5	14	1	0	25	5
2019	51	43	11	10	19	0	0	20	8
2020	52	47	9	8	27	0	0	33	5
2021	58	55	5	18	28	1	2	36	3
2022	96	93	7	22	35	0	0	64	3
2023	104	101	15	31	50	1	0	63	3
2024	85	80	8	36	35	0	0	59	5
2025	80	79	5	17	30	0	0	62	1
2026	38	37	2	14	20	0	0	23	1

An outcome in a report is not proof that the drug was the cause. The reporter gives the outcome, and FDA does not verify it. FDA says:

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 2 Oct 2026.

The six headings with the names of FDA are the outcome terms of FDA. A report can have more than one outcome. The columns Serious and Not serious are the two values of the openFDA field serious. For the value serious, openFDA gives this description:

The adverse event resulted in death, a life threatening condition, hospitalization, disability, congenital anomaly, or other serious condition
Source: openFDA, Drug adverse event fields (YAML reference). The site read the page on 2 Oct 2026.

The year is the year of the openFDA file that holds the latest version of the report. It is not always the year in which FDA first received the report. The chart of the next section uses the year of first receipt. The latest year is not complete.

Reports by year and month

Reports that name Succinylcholine, by the year in which FDA received them

The column of 2026 has an outline, because the year is not complete. It has the reports that FDA received through June 2026 only.

Show the figures of the chart as a table

Reports that name Succinylcholine, by the year in which FDA received them
Year	Reports
2004	4
2005	5
2006	5
2009	13
2010	6
2011	3
2012	9
2013	41
2014	178
2015	42
2016	35
2017	41
2018	47
2019	52
2020	52
2021	66
2022	101
2023	91
2024	87
2025	67
2026	29

Reports that name Succinylcholine, by month, five years to June 2026

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

Why a count moves

A count moves for many reasons. The guide gives FDA's words about them.

Patients and reporters

Age of the patient in the reports that name Succinylcholine
Age	Reports	Share
Under 2	9	0.9%
2 to 11	18	1.8%
12 to 17	23	2.4%
18 to 44	270	27.7%
45 to 64	200	20.5%
65 to 74	103	10.6%
75 and over	34	3.5%
Age not given	317	32.5%

Sex of the patient in the reports that name Succinylcholine
Sex	Reports	Share
Female	367	37.7%
Male	330	33.9%
Unknown or not given	277	28.4%

Type of reporter in the reports that name Succinylcholine
Reporter	Reports	Share
Physician	453	46.5%
Pharmacist	144	14.8%
Other health professional	325	33.4%
Lawyer	0	0%
Consumer or non-health professional	25	2.6%
Not given	27	2.8%

Age and sex are as the report gives them. The reporter is the primary source in the report. 58.8% of the reports give the United States as the country.

Reason for use

Reason for use (indication) that the reports of Succinylcholine record
Indication as recorded (MedDRA)	Reports	Share
Anaesthesia	235	24.1%
Induction of anaesthesia	112	11.5%
General anaesthesia	102	10.5%
Endotracheal intubation	56	5.7%
Neuromuscular blockade	29	3%
Surgery	29	3%

The reporter fills in the indication, and the field is often empty. Each share is of all 974 reports.

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These links are for navigation. No count selected them. The class page lists each drug of the class.

Official pages

DailyMed labels for SuccinylcholineThe labels (prescribing information) that have this name, at the National Library of Medicine.
MedWatch Online Voluntary Reporting FormThe online form of FDA for a voluntary report.
MedWatch: The FDA Safety Information and Adverse Event Reporting ProgramThe page of the FDA program that receives reports about drugs and devices.
FDA Adverse Event Monitoring System (AEMS) Public DashboardThe public dashboard of FDA for adverse event reports on drugs and biologics.

The site checked these addresses on 2 Oct 2026. The links open in a new tab.

Cite this page

Reported Reactions. Succinylcholine: adverse event reports that FDA received. https://reportedreactions.com/drug/succinylcholine/ Source: U.S. Food and Drug Administration, openFDA Drug Adverse Event (FAERS) files, release of 29 Oct 2026. Reports received through 30 Jun 2026.

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.

A report is in the count when it names Succinylcholine as a suspect or interacting product. The 748 reports that name it only as a concomitant medicine are not in the count. 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

Do these reports show that Succinylcholine was responsible for the reactions?

No. FDA says:

For any given report, there is no certainty that a suspected drug caused the event.
Source: FDA, FDA Adverse Event Monitoring System (AEMS) Public Dashboard. Content current as of 11 Mar 2026. The site read the page on 2 Oct 2026.

A reaction can relate to the condition that the drug treats, to other medicines, or to something else.

Is this the list of reactions on the label of Succinylcholine?

No. It is a count of what people reported to FDA: 974 reports from March 2004 to June 2026. The FDA-approved label of a product lists its adverse reactions. The official pages at the end of this page link to the labels.

Who sent these reports?

Physician (46.5%), other health professional (33.4%) and pharmacist (14.8%). These are the types of reporter for the reports that name this drug.

If a manufacturer receives an adverse event report, it is normally required to send the report to FDA.
Source: openFDA, Drug Adverse Event Overview. The site read the page on 2 Oct 2026.

How does a person report an adverse event?

FDA runs MedWatch, a program that takes voluntary reports from health professionals, patients and consumers. The guide on how to report has the links.

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