Mycophenolate Mofetil
According to the FDA label: Mycophenolate mofetil for oral suspension (MMF) is indicated for the prophylaxis of organ rejection, in adult and pediatric recipients 3 months of age and older of allogeneic kidney [see Clinical Studies (14.1) ], heart [see Clinical Studies (14.2) ] or liver transplants [see Clinical Studies (14.3) ] , in combination with other immunosuppressants.
100,444 adverse event reports submitted to the FDA (2001–2026)
Top Reported Adverse Events
The most frequently reported events in association with Mycophenolate Mofetil in the FAERS database. These are events reported by patients taking this medication, not necessarily caused by it. A single report may include multiple events.
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Off Label Use 15,211 reports
Using a medication for a condition or in a way that the FDA has not officially approved. This is common and often legal, and a report of it does not mean something went wrong. Doctors sometimes prescribe drugs off label based on their judgment.
Full definition in the glossary →Drug Ineffective 9,863 reports
A report that the medication did not work as expected for the person taking it. This is a reporting category, not a sign the drug is defective. It simply means someone felt it was not helping their condition.
Full definition in the glossary →Product Use in Unapproved Indication 6,830 reports
Using a medication for a condition it is not officially approved to treat. Like off label use, this is a reporting category and does not by itself mean harm occurred.
Full definition in the glossary →Diarrhoea 4,881 reports
Loose or watery bowel movements, often frequent. Also spelled diarrhea in American English.
Full definition in the glossary → See all drugs reporting this event →Pyrexia 4,386 reports
The medical term for fever, meaning a raised body temperature.
Full definition in the glossary → See all drugs reporting this event →Cytomegalovirus Infection 4,301 reports
An infection with a common virus, often called CMV, that can be serious for people with weakened immune systems.
Full definition in the glossary →Pneumonia 4,098 reports
An infection that inflames the air sacs in the lungs, which can cause cough, fever, and difficulty breathing.
Full definition in the glossary →Condition Aggravated 3,685 reports
A report that the person's existing health condition got worse. This describes a worsening of something the person already had, not necessarily a new problem caused by the drug.
Full definition in the glossary →- Transplant Rejection 3,491 reports
Infection 3,252 reports
A general report of an infection, used when no more specific type is given.
Full definition in the glossary →Fatigue 3,162 reports
Extreme tiredness or lack of energy that does not improve with rest.
Full definition in the glossary → See all drugs reporting this event →Nausea 3,052 reports
The feeling of sickness in your stomach that often comes before vomiting.
Full definition in the glossary → See all drugs reporting this event →COVID-19 3,008 reports
The illness caused by the SARS-CoV-2 coronavirus.
Full definition in the glossary →Acute Kidney Injury 2,917 reports
A sudden drop in how well the kidneys are working. It is often temporary and can have many causes.
Full definition in the glossary →Vomiting 2,908 reports
Throwing up the contents of the stomach.
Full definition in the glossary → See all drugs reporting this event →
Ranked by frequency of reports, not severity. The most-reported event is not necessarily the most dangerous or the most common in patients taking this drug.
Who Is Reporting
Demographics of patients in FAERS reports that included this information. Not all reports include patient demographics.
By Sex
View reporter sex data as a table
| Sex | Reports |
|---|---|
| Male | 43,053 |
| Female | 40,674 |
| Unknown | 575 |
By Age Group
View age group data as a table
| Age group | Reports |
|---|---|
| 0-17 | 10,693 |
| 18-34 | 11,354 |
| 35-49 | 17,225 |
| 50-64 | 22,828 |
| 65-74 | 10,031 |
| 75+ | 2,579 |
This shows who filed reports, reflecting who takes this drug and who tends to report, not who is at greatest risk.
Reported Outcomes
Outcomes recorded in FAERS reports that included Mycophenolate Mofetil. A single report may involve multiple reactions, each with a different outcome. These categories are defined by FDA reporting guidelines, not by PillSignal.
View outcome data as a table
| Outcome | Reports |
|---|---|
| Other Serious | 72,198 |
| Hospitalization | 36,713 |
| Death | 19,234 |
| Life-Threatening | 10,229 |
| Non-Serious | 6,299 |
| Disability | 3,379 |
Serious outcomes are far more likely to be reported than mild ones, so this overstates how often outcomes are serious. A recorded death does not mean the drug caused it.
Report Volume Over Time
Number of FAERS reports received per quarter for Mycophenolate Mofetil. Changes in volume may reflect shifts in prescribing rates, media attention, or reporting behavior, not changes in the medication's safety profile.
View report trend as a table
| Year | Reports |
|---|---|
| 2001 | 3 |
| 2003 | 2 |
| 2004 | 264 |
| 2005 | 313 |
| 2006 | 587 |
| 2007 | 750 |
| 2008 | 1,013 |
| 2009 | 1,547 |
| 2010 | 1,368 |
| 2011 | 1,578 |
| 2012 | 1,528 |
| 2013 | 1,510 |
| 2014 | 1,775 |
| 2015 | 2,127 |
| 2016 | 2,673 |
| 2017 | 4,367 |
| 2018 | 6,307 |
| 2019 | 8,428 |
| 2020 | 9,607 |
| 2021 | 9,141 |
| 2022 | 8,366 |
| 2023 | 9,700 |
| 2024 | 12,364 |
| 2025 | 12,343 |
| 2026 (partial) | 2,783 |
The steep increase around 2004 reflects the FDA's move to electronic submission, not a change in this drug's safety. Trends track reporting volume, not risk.
Medications commonly reported with Mycophenolate Mofetil
In FDA adverse event reports that mention Mycophenolate Mofetil, these medications appeared most often in the same report.
- Tacrolimus (48,178 reports)
- Tacrolimus % (45,094 reports)
- Prednisone (32,904 reports)
- Prednisolone (19,819 reports)
- Methylprednisolone (17,024 reports)
This reflects co-occurrence in submitted reports, not evidence of drug interaction or combined risk. People often report several medications taken for the same condition or for unrelated reasons. Talk to a doctor or pharmacist about your specific medications.
Related Drugs
Other medications with similar adverse event profiles in FDA FAERS reports.
Data Source
This data is sourced from the FDA's Adverse Event Monitoring System (AEMS), formerly FAERS, via the OpenFDA API. PillSignal is not affiliated with the FDA.
View this data on the FDA website →Data last updated: June 2026