Drug Safety Information for FAMVIR (Famciclovir)

Safety-related Labeling Changes for FAMVIR (FAMCICLOVIR) Brand name discontinued; available as generic: FDA Link

Adverse Drug Reactions for FAMVIR* (Famciclovir)

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 FAMVIR
(reported in FDA Medwatch/FAERS Reports)

  Side Effect # of FDA Reports
1Nausea130
2Pyrexia104
3Diarrhoea*103
4Pain*99
5Fatigue*96
6Dyspnoea95
7Headache*95
8Vomiting*91
9Dizziness*91
10Asthenia88
11Rash84
12Pneumonia80
13Anxiety78
14Anaemia72
15Herpes zoster71
16Malaise69
17Oedema peripheral69
18Drug ineffective67
19Abdominal pain62
20Thrombocytopenia61

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

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

Reason # of FDA Reports
1Herpes zoster*1269
2Product used for unknown indication570
3Herpes simplex285
4Prophylaxis211
5Herpes virus infection202
6Mouth ulceration172
7Infection prophylaxis130
8Oral herpes*105
9Antiviral prophylaxis85
10Genital herpes*55

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


Types of Adverse Events for FAMVIR

Total Reports Filed with FDA: 12717


Number of FDA Adverse Event Reports by Patient Age for FAMVIR

Total Reports Filed with FDA: 12717*


* Reports for drugs with the same active ingredients have been aggregated in this analysis: Famciclovir (Famvir, Famciclovir)

Charts are based on 12717 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 FAMVIR 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.