Drug Safety Information for COUMADIN (Warfarin sodium)

Safety-related Labeling Changes for COUMADIN (WARFARIN SODIUM) Rx Drug: FDA Link

Adverse Drug Reactions for COUMADIN* (Warfarin sodium)

These charts and graphs are based on reports received through the FDA Adverse Event Reporting System (FAERS) program (see below).

Top 20 Adverse Effects Associated with COUMADIN
(reported in FDA Medwatch/FAERS Reports)

  Side Effect # of FDA Reports
1International normalised ratio increased10425
2Dyspnoea7761
3Nausea5179
4Fatigue*4838
5Dizziness*4663
6Drug interaction4635
7Asthenia4432
8Death4420
9Fall4413
10Diarrhoea4400
11Atrial fibrillation4374
12Anaemia3941
13Pneumonia3883
14Pain3662
15Drug ineffective3568
16Headache*3513
17Oedema peripheral3452
18Haemorrhage3334
19Vomiting3326
20Cardiac failure congestive3211

* This side effect also appears in "Top 10 Side Effects of COUMADIN " in the drug's Review Summary based on AskaPatient reviews.

Top 10 Reasons for Taking COUMADIN
(associated with FDA Medwatch/FAERS Reports)

Reason # of FDA Reports
1Product used for unknown indication46494
2Atrial fibrillation*34583
3Anticoagulant therapy14221
4Deep vein thrombosis*10846
5Pulmonary embolism*9229
6Thrombosis prophylaxis6603
7Thrombosis6453
8Prophylaxis3272
9Cerebrovascular accident*2409
10Cardiac disorder1651

*Also a top-10 reason in AskaPatient Review Summary.


Types of Adverse Events for COUMADIN

Total Reports Filed with FDA: 503278


Number of FDA Adverse Event Reports by Patient Age for COUMADIN

Total Reports Filed with FDA: 503278*


* Reports for drugs with the same active ingredients have been aggregated in this analysis: Warfarin sodium (Athrombin, Warf, Panwarfin, Warfarina, Warfarin, Warfarin sodium, Coumadin, Jantoven)

Charts are based on 503278 reports filed with the FDA between 2004 and June 2015.

Adverse Event Reports are submitted to the FDA by pharmaceutical companies (mandatory reporting is required by manufacturers, distributors, or importers), health care providers such as doctors (voluntary reporting), and by patients themselves (voluntary reporting). More Information on FDA MedWatch (FDA Safety Information and Adverse Event Reporting Program)Voluntary reporting takes place under the FDA's MedWatch program, where health care professionals and consumers submit reports to FDA when they find a problem with a drug, medical device, biologic, or other FDA-regulated product. An adverse event is any undesirable experience or extreme side effect associated with the use of a medical product. Adverse events include: death, life threatening event, hospitalization, disability or permanent damage, congenital anomaly or birth defect, medical product use requiring a surgical or other intervention, or other serious medical situation believed to be caused by the drug.

Click to go back to search results and COUMADIN Reviews and Review Summary .

Historical Analytics of FDA Adverse Event Reports Provided by Druginformer.com. FDA Drug Safety Information, including safety-related labeling updates, required post-approval safety studies, risk evaluation management strategies (REMS), alerts, and recalls are compiled by AskaPatient.com from the U.S. Food and Drug Administration.