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Guide
Drug Safety-related Labeling Changes (SrLC) Database
| ANDA | Abbreviated New Drug Application |
| BLA | Biologics License Application |
| CDER | Center for Drug Evaluation and Research |
| MG | Medication Guide |
| NDA | New Drug Application |
| PCI | Patient Counseling Information |
| PI | Patient Information |
| PLR | Physician Labeling Rule |
| PLLR | Pregnancy and Lactation Labeling Rule |
| Italics | For the most part, italics indicate an FDA comment such as:
Additions and/or revisions underlined These italics usually appear at the beginning of the section. In some cases, italics may be an inherent part of the label, and will most often appear in the body of the section. |
| Underlines | Any text that is underlined indicates text that has been added or revised. There are exceptions where underlining occurs in a section subtitle or heading. This is the case when there is just one word underlined in the body of the text. |
Sections
| BW | Box Warning |
| WP | Warnings and Precautions all in one section (PLR-format) Warnings as one section (pre-PLR format) Precautions as one section (pre-PLR format) |
| AR | Adverse Reactions (in pre-PLR format, this may be a subheading under precautions). |
| DI | Drug Interactions (in pre-PLR format, this may be a subheading under precautions). |
| USP | Use in Specific Populations (Inclusive on one or more of the following: Pregnancy; Lactation (PLLR- format); Nursing Mothers (pre-PLLR format); Females and Males of Reproductive Potential (PLLR format only); Pediatric Use, Geriatric Use, Renal Impairment, Hepatic Impairment, Sex, Race (these last six may be a subheading of precautions if label in pre-PLLR format. |
| PCI/PI/MG | Patient Counseling Information (PLR format only) - summarizes the information that a health care provider should convey to a patient (or caregiver when applicable) when a counseling discussion is taking place (e.g., a physician prescribing a drug during an office visit, a nurse providing discharge instructions at a hospital, or a pharmacist conveying information at a pharmacy). Patient Information - FDA approved patient labeling. Medication Guide - paper handouts that come with many prescription medicines. The guides address issues that are specific to particular drugs and drug classes, and they contain FDA-approved information that can help patients avoid serious adverse events. |
Only NDAs and CDER regulated BLAs are included in this database. ANDAs are not included.
Applications that remain active, even if the product has been discontinued, undergo safety-related labeling changes.
PONSTEL (NDA-015034)
(MEFENAMIC ACID)
Safety-related Labeling Changes Approved by FDA Center for Drug Evaluation and Research (CDER)
12/31/2025 (SUPPL-47)
5 Warnings and Precautions
The following subsections created to comply with Physician Labeling Rule (PLR); please refer to label for complete information:
5.1 Cardiovascular Thrombotic Events
5.2 Gastrointestinal Bleeding, Ulceration, and Perforation
5.3 Hepatotoxicity
5.4 Hypertension
5.5 Heart Failure and Edema
5.6 Renal Toxicity and Hyperkalemia
5.7 Anaphylactic Reactions
5.8 Exacerbation of Asthma Related to Aspirin Sensitivity
5.9 Serious Skin Reactions
5.10 Drug Reaction with Eosinophilia and Systemic Symptoms (DRESS)
5.11 Fetal Toxicity
5.12 Hematological To
5.13 Masking of Inflammation and Fever
5.14 Laboratory Monitoring
6 Adverse Reactions
Additions and/or revisions underlined:
. . .
The following adverse reactions associated with the use of PONSTEL were identified in clinical studies or post-marketing reports. Because some of these reactions were reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure
. . .
Auditory System - Tinnitus
Genitourinary System - Abnormal renal function Hepatic System - Elevated liver enzymes Dermatologic - Pruritus, rashes
Cardiovascular - Anemia, edema
Central Nervous System - Dizziness, headache
Hematopoetic and lymphatic system - Increased bleeding time
Additional adverse experiences reported less frequently and listed here by body system include: General - anaphylactoid reactions, appetite changes, death, fever, infection, sepsis
Cardiovascular - congestive heart failure, hypertension, tachycardia, syncope arrhythmia, hypotension, myocardial infarction, palpitations, vasculitis
Gastrointestinal system - dry mouth, esophagitis, gastric/peptic ulcers, gastritis, gastrointestinal bleeding, glossitis, hematemesis, hepatitis, jaundice, eructation, liver failure, pancreatitis
Hematopoetic and lymphatic system - ecchymosis, eosinophilia, leukopenia, melena, purpura, rectal bleeding, stomatitis, thrombocytopenia, agranulocytosis, hemolytic anemia, aplastic anemia, lymph-adenopathy, pancytopenia
Metabolic - weight changes, hyperglycemia
Central Nervous System - anxiety, asthenia, confusion, depression, dream abnormalities, drowsiness; insomnia, malaise, nervousness, paresthesia, somnolence, tremors, vertigo, convulsions, coma, hallucinations, meningitis
Respiratory system - asthma, dyspnea, respiratory depression, pneumonia
Dermatologic - alopecia, photosensitivity, pruritus, sweat, angioedema, toxic epidermal necrosis, erythema multiforme, exfoliative dermatitis, Stevens-Johnson syndrome, fixed drug eruption (FDE), urticaria
Special senses - blurred vision, conjunctivitis, hearing impairment
Genitourinary system - cystitis, dysuria, hematuria, interstitial nephritis, oliguria/polyuria, proteinuria, renal failure
8 Use in Specific Populations
8.1 Pregnancy
PLLR conversion:
Risk Summary
Use of NSAIDs, including PONSTEL, can cause premature closure of the fetal ductus arteriosus and fetal renal dysfunction leading to oligohydramnios and, in some cases, neonatal renal impairment. Because of these risks, limit dose and duration of PONSTEL use between about 20 and 30 weeks of gestation, and avoid PONSTEL use at about 30 weeks of gestation and later in pregnancy (see Clinical Considerations, Data).
Premature Closure of Fetal Ductus Arteriosus
Use of NSAIDs, including PONSTEL, at about 30 weeks gestation or later in pregnancy increases the risk of premature closure of the fetal ductus arteriosus.
Oligohydramnios/Neonatal Renal Impairment
Use of NSAIDs at about 20 weeks gestation or later in pregnancy has been associated with cases of fetal renal dysfunction leading to oligohydramnios, and in some cases, neonatal renal impairment.
Data from observational studies regarding other potential embryofetal risks of NSAID use in women in the first or second trimesters of pregnancy are inconclusive. In animal reproduction studies, administration of mefenamic acid to pregnant rats during organogenesis through lactation resulted in perinatal death and smaller litter sizes at exposures comparable to the Maximum Recommended Human Dose (MRHD) (see Data). Based on animal data, prostaglandins have been shown to have an important role in endometrial vascular permeability, blastocyst implantation, and decidualization. In animal studies, administration of prostaglandin synthesis inhibitors such as mefenamic acid, resulted in increased pre- and post-implantation loss. Prostaglandins also have been shown to have an important role in fetal kidney development. In published animal studies, prostaglandin synthesis inhibitors have been reported to impair kidney development when administered at clinically relevant doses.
The background risk of major birth defects and miscarriage for the indicated population(s) is unknown. All pregnancies have a background risk of birth defect, loss, or other adverse outcomes. In the U.S. general population, the estimated background risk of major birth defects and miscarriage in clinically recognized pregnancies is 2% to 4% and 15% to 20%, respectively.
Clinical Considerations
Fetal/Neonatal Adverse Reactions
Premature Closure of Fetal Ductus Arteriosus:
Avoid use of NSAIDs in women at about 30 weeks gestation and later in pregnancy, because NSAIDs, including PONSTEL, can cause premature closure of the fetal ductus arteriosus (see Data).
Oligohydramnios/Neonatal Renal Impairment:
If an NSAID is necessary at about 20 weeks gestation or later in pregnancy, limit the use to the lowest effective dose and shortest duration possible. If PONSTEL treatment extends beyond 48 hours, consider monitoring with ultrasound for oligohydramnios. If oligohydramnios occurs, discontinue PONSTEL and follow up according to clinical practice (see Data ).
Labor or Delivery
There are no studies on the effects of mefenamic acid during labor or delivery. In animal studies, NSAIDs, including mefenamic acid, inhibit prostaglandin synthesis, cause delayed parturition, and increase the incidence of stillbirth.
Data
Human Data
Premature Closure of Fetal Ductus Arteriosus:
Published literature reports that the use of NSAIDs at about 30 weeks of gestation and later in pregnancy may cause premature closure of the fetal ductus arteriosus.
Oligohydramnios/Neonatal Renal Impairment:
Published studies and postmarketing reports describe maternal NSAID use at about 20 weeks gestation or later in pregnancy associated with fetal renal dysfunction leading to oligohydramnios, and in some cases, neonatal renal impairment. These adverse outcomes are seen, on average, after days to weeks of treatment, although oligohydramnios has been infrequently reported as soon as 48 hours after NSAID initiation. In many cases, but not all, the decrease in amniotic fluid was transient and reversible with cessation of the drug. There have been a limited number of case reports of maternal NSAID use and neonatal renal dysfunction without oligohydramnios, some of which were irreversible. Some cases of such as exchange transfusion or dialysis.
Methodological limitations of these postmarketing studies and reports include lack of a control group; limited information regarding dose, duration, and timing of drug exposure; and concomitant use of other medications. These limitations preclude establishing a reliable estimate of the risk of adverse fetal and neonatal outcomes with maternal NSAID use. Because the published safety data on neonatal outcomes involved mostly preterm infants, the generalizability of certain reported risks to the full-term infant exposed to NSAIDs through maternal use is uncertain.
Animal Data
Pregnant rats administered 249 mg/kg of mefenamic acid (1.6-times the MRHD of 1500 mg/day on a mg/m2 basis) from Gestation Day (GD) 6 to GD 15 did not result in any clear adverse developmental effects.
Pregnant rabbits given 50 mg/kg of mefenamic acid (0.6-times the MRHD on a mg/m2 basis) from GD 6 to GD 18 did not result in any clear treatment-related adverse developmental effects. However, incidences of resorption were greater in treated compared to control animals. This dose was associated with some evidence of maternal toxicity with 4 of 18 rabbits exhibiting diarrhea and weight loss.
Dietary administration of mefenamic acid at a dose of 181 mg/kg (1.2-times the MRHD on a mg/m2 basis) to pregnant rats from GD 15 to weaning resulted in an increased incidence of perinatal death. Treated dams were associated with decreased weight gain and delayed parturition. In another study, dietary administration of mefenamic acid at a dose of 155 mg/kg (equivalent to the MRHD of 1500 mg/day on a mg/m2 basis) to females 15 days prior to mating through to weaning resulted in smaller average litter sizes and higher incidence of perinatal death.
8.2 Lactation
PLLR conversion:
Risk Summary
Mefenamic acid is present in human milk in low amounts and may be transferred to breastfed infants. There are no available data on the effects of PONSTEL on the breastfed infant or on milk production. The developmental and health benefits of breastfeeding should be considered along with the mother’s clinical need for PONSTEL and any potential adverse effects on the breastfed infant from the PONSTEL or from the underlying maternal condition.
8.3 Females and Males of Reproductive Potential
New subsection added to comply with PLR; please refer to label for complete information
8.4 Pediatric Use
Additions and/or revisions underlined:
The safety and effectiveness of PONSTEL have been established for management of mild to moderate pain in pediatric patients 14 years of age and older.
The safety and effectiveness of PONSTEL have been established for treatment of primary dysmenorrhea in pediatric patients.
The safety and effectiveness of PONSTEL have not been established for management of mild to moderate pain in pediatric patients less than 14 years of age.
8.6 Renal Impairment
Additions and/or revisions underlined:
The renal effects of PONSTEL may hasten the progression of renal dysfunction in patients with pre-existing renal disease.
Given that mefenamic acid, its metabolites and conjugates are primarily excreted by the kidneys, the potential exists for mefenamic acid metabolites to accumulate. PONSTEL should not be administered to patients with pre-existing renal disease or in patients with significantly impaired renal function [see Warnings and Precautions (5.6)].
17 PCI/PI/MG (Patient Counseling Information/Patient Information/Medication Guide)
PATIENT COUNSELING INFORMATION
New section added to comply with PLR; please refer to label for complete information
MEDICATION GUIDE
Extensive changes; please refer to label for complete information
Other
Physician Labeling Rule (PLR) conversion.
Pregnancy and Lactation Labeling Rule (PLLR) conversion.
11/21/2024 (SUPPL-46)
5 Warnings and Precautions
WARNINGS
Additions and/or revisions underlined:
Serious Skin Reactions
NSAIDs, including mefenamic acid, can cause serious skin adverse reactions such as exfoliative dermatitis, Stevens-Johnson Syndrome (SJS), and toxic epidermal necrolysis (TEN), which can be fatal. NSAIDs can also cause fixed drug eruption (FDE). FDE may present as a more severe variant known as generalized bullous fixed drug eruption (GBFDE), which can be life-threatening. These serious events may occur without warning. Inform patients about the signs and symptoms of serious skin reactions and to discontinue the use of mefenamic acid at the first appearance of skin rash or any other sign of hypersensitivity. Mefenamic acid is contraindicated in patients with previous serious skin reactions to NSAIDs (see CONTRAINDICATIONS).
…
6 Adverse Reactions
Additions and/or revisions underlined:
…
Skin and appendages - angioedema, toxic epidermal necrosis, erythema multiforme, exfoliative dermatitis, Stevens-Johnson syndrome, fixed drug eruption (FDE), urticaria
…
04/28/2021 (SUPPL-45)
5 Warnings and Precautions
Drug Reaction with Eosinophilia and Systemic Symptoms (DRESS)(Newly added subsection)
Drug Reaction with Eosinophilia and Systemic Symptoms (DRESS) has been reported in patients taking NSAIDs such as mefenamic acid. Some of these events have been fatal or life-threatening. DRESS typically, although not exclusively, presents with fever, rash, lymphadenopathy, and/or facial swelling. Other clinical manifestations may include hepatitis, nephritis, hematological abnormalities, myocarditis, or myositis. Sometimes symptoms of DRESS may resemble an acute viral infection.
Eosinophilia is often present. Because this disorder is variable in its presentation, other organ systems not noted here may be involved. It is important to note that early manifestations of hypersensitivity, such as fever or lymphadenopathy, may be present even though rash is not evident. If such signs or symptoms are present, discontinue mefenamic acid and evaluate the patient immediately.
(Additions and/or revisions underlined)
Premature Closure of Fetal Ductus Arteriosus
Avoid use of NSAIDs, including mefenamic acid, in pregnant women at about 30 weeks gestation and later. NSAIDs including mefenamic acid, increase the risk of premature closure of the fetal ductus arteriosus at approximately this gestational age.
Oligohydramnios/Neonatal Renal Impairment
Use of NSAIDs, including mefenamic acid, at about 20 weeks gestation or later in pregnancy may cause fetal renal dysfunction leading to oligohydramnios and, in some cases, neonatal renal impairment. These adverse outcomes are seen, on average, after days to weeks of treatment, although oligohydramnios has been infrequently reported as soon as 48 hours after NSAID initiation.
Oligohydramnios is often, but not always, reversible with treatment discontinuation. Complications of prolonged oligohydramnios may, for example, include limb contractures and delayed lung maturation. In some postmarketing cases of impaired neonatal renal function, invasive procedures such as exchange transfusion or dialysis were required.
If NSAID treatment is necessary between about 20 weeks and 30 weeks gestation, limit mefenamic acid use to the lowest effective dose and shortest duration possible. Consider ultrasound monitoring of amniotic fluid if mefenamic acid treatment extends beyond 48 hours. Discontinue mefenamic acid if oligohydramnios occurs and follow up according to clinical practice [see PRECAUTIONS; Pregnancy].
8 Use in Specific Populations
Pregnancy(Additions and/or revisions underlined)
Risk Summary
Use of NSAIDs, including mefenamic acid, can cause premature closure of the fetal ductus arteriosus and fetal renal dysfunction leading to oligohydramnios and, in some cases, neonatal renal impairment. Because of these risks, limit dose and duration of mefenamic acid use between about 20 and 30 weeks of gestation, and avoid mefenamic acid use at about 30 weeks of gestation and later in pregnancy [see WARNINGS; Fetal Toxicity].
Premature Closure of Fetal Ductus Arteriosus
Use of NSAIDs, including mefenamic acid, at about 30 weeks gestation or later in pregnancy increases the risk of premature closure of the fetal ductus arteriosus.
Oligohydramnios/Neonatal Renal Impairment
Use of NSAIDs at about 20 weeks gestation or later in pregnancy has been associated with cases of fetal renal dysfunction leading to oligohydramnios, and in some cases, neonatal renal impairment.
Data from observational studies regarding other potential embryofetal risks of NSAID use in women in the first or second trimesters of pregnancy are inconclusive. Based on animal data, prostaglandins have been shown to have an important role in endometrial vascular permeability, blastocyst implantation, and decidualization. In animal studies, administration of prostaglandin synthesis inhibitors such as mefenamic acid, resulted in increased pre- and post-implantation loss.
Prostaglandins also have been shown to have an important role in fetal kidney development. In published animal studies, prostaglandin synthesis inhibitors have been reported to impair kidney development when administered at clinically relevant doses.
The estimated background risk of major birth defects and miscarriage for the indicated population(s) is unknown. All pregnancies have a background risk of birth defect, loss, or other adverse outcomes. In the U.S. general population, the estimated background risk of major birth defects and miscarriage in clinically recognized pregnancies is 2% to 4% and 15% to 20%, respectively.
Clinical Considerations
Fetal/Neonatal Adverse Reactions
Premature Closure of Fetal Ductus Arteriosus:
Avoid use of NSAIDs in women at about 30 weeks gestation and later in pregnancy, because NSAIDs, including mefenamic acid, can cause premature closure of the fetal ductus arteriosus (see WARNINGS; Fetal Toxicity).
Oligohydramnios/Neonatal Renal Impairment:
If an NSAID is necessary at about 20 weeks gestation or later in pregnancy, limit the use to the lowest effective dose and shortest duration possible. If mefenamic acid treatment extends beyond 48 hours, consider monitoring with ultrasound for oligohydramnios. If oligohydramnios occurs, discontinue mefenamic acid and follow up according to clinical practice (see WARNINGS; Fetal Toxicity).
Data
Human Data
Premature Closure of Fetal Ductus Arteriosus:
Published literature reports that the use of NSAIDs at about 30 weeks of gestation and later in pregnancy may cause premature closure of the fetal ductus arteriosus.
Oligohydramnios/Neonatal Renal Impairment:
Published studies and postmarketing reports describe maternal NSAID use at about 20 weeks gestation or later in pregnancy associated with fetal renal dysfunction leading to oligohydramnios, and in some cases, neonatal renal impairment. These adverse outcomes are seen, on average, after days to weeks of treatment, although oligohydramnios has been infrequently reported as soon as 48 hours after NSAID initiation. In many cases, but not all, the decrease in amniotic fluid was transient and reversible with cessation of the drug. There have been a limited number of case reports of maternal NSAID use and neonatal renal dysfunction without oligohydramnios, some of which were irreversible. Some cases of such as exchange transfusion or dialysis.
Methodological limitations of these postmarketing studies and reports include lack of a control group; limited information regarding dose, duration, and timing of drug exposure; and concomitant use of other medications. These limitations preclude establishing a reliable estimate of the risk of adverse fetal and neonatal outcomes with maternal NSAID use. Because the published safety data on neonatal outcomes involved mostly preterm infants, the generalizability of certain reported risks to the full-term infant exposed to NSAIDs through maternal use is uncertain.
17 PCI/PI/MG (Patient Counseling Information/Patient Information/Medication Guide)
Medication Guide(Additions and/or revisions underlined)
Before taking NSAIDs, tell our healthcare provider about all of your medical conditions,
including if you. . .
• are pregnant or plan to become pregnant. Taking NSAIDs at about 20 weeks of
pregnancy or later may harm your unborn baby. If you need to take NSAIDs for more
than 2 days when you are between 20 and 30 weeks of pregnancy, your healthcare
provider may need to monitor the amount of fluid in your womb around your baby.
You should not take NSAIDs after about 30 weeks of pregnancy
05/09/2016 (SUPPL-44)
Boxed Warning
WARNING: RISK OF SERIOUS CARDIOVASCULAR AND GASTROINTESTINAL EVENTSCardiovascular Thrombotic Events
- Nonsteroidal anti-inflammatory drugs (NSAIDs) cause an increased risk of serious cardiovascular thrombotic events, including myocardial infarction and stroke, which can be fatal. This risk may occur early in treatment and may increase with duration of use.
- {Product} is contraindicated in the setting of coronary artery bypass graft (CABG) surgery.
Gastrointestinal Bleeding, Ulceration, and Perforation
- NSAIDs cause an increased risk of serious gastrointestinal (GI) adverse events including bleeding, ulceration, and perforation of the stomach or intestines, which can be fatal. These events can occur at any time during use and without warning symptoms. Elderly patients and patients with a prior history of peptic ulcer disease and/or GI bleeding are at greater risk for serious GI events.
5 Warnings and Precautions
Cardiovascular Thrombotic Events- Clinical trials of several COX-2 selective and nonselective NSAIDs of up to three years duration have shown an increased risk of serious cardiovascular (CV) thrombotic events, including myocardial infarction (MI) and stroke, which can be fatal. Based on available data, it is unclear that the risk for CV thrombotic events is similar for all NSAIDs. The relative increase in serious CV thrombotic events over baseline conferred by NSAID use appears to be similar in those with and without known CV disease or risk factors for CV disease. However, patients with known CV disease or risk factors had a higher absolute incidence of excess serious CV thrombotic events, due to their increased baseline rate. Some observational studies found that this increased risk of serious CV thrombotic events began as early as the first weeks of treatment. The increase in CV thrombotic risk has been observed most consistently at higher doses.
- To minimize the potential risk for an adverse CV event in NSAID-treated patients, use the lowest effective dose for the shortest duration possible. Physicians and patients should remain alert for the development of such events, throughout the entire treatment course, even in the absence of previous CV symptoms. Patients should be informed about the symptoms of serious CV events and the steps to take if they occur.
- There is no consistent evidence that concurrent use of aspirin mitigates the increased risk of serious CV thrombotic events associated with NSAID use. The concurrent use of aspirin and an NSAID, such as meloxicam, increases the risk of serious gastrointestinal (GI) events.
Status Post Coronary Artery Bypass Graft (CABG) Surgery
- Two large, controlled clinical trials of a COX-2 selective NSAID for the treatment of pain in the first 10-14 days following CABG surgery found an increased incidence of myocardial infarction and stroke. NSAIDs are contraindicated in the setting of CABG.
Post-MI Patients
- Observational studies conducted in the Danish National Registry have demonstrated that patients treated with NSAIDs in the post-MI period were at increased risk of reinfarction, CV-related death, and all-cause mortality beginning in the first week of treatment. In this same cohort, the incidence of death in the first year post-MI was 20 per 100 person years in NSAID-treated patients compared to 12 per 100 person years in non-NSAID exposed patients. Although the absolute rate of death declined somewhat after the first year post-MI, the increased relative risk of death in NSAID users persisted over at least the next four years of follow-up.
- Avoid the use of {Product} in patients with a recent MI unless the benefits are expected to outweigh the risk of recurrent CV thrombotic events. If {Product} is used in patients with a recent MI, monitor patients for signs of cardiac ischemia.
- The Coxib and traditional NSAID Trialists’ Collaboration meta-analysis of randomized controlled trials demonstrated an approximately two-fold increase in hospitalizations for heart failure in COX-2 selective-treated patients and nonselective NSAID-treated patients compared to placebo-treated patients. In a Danish National Registry study of patients with heart failure, NSAID use increased the risk of MI, hospitalization for heart failure, and death.
- Additionally, fluid retention and edema have been observed in some patients treated with NSAIDs. Use of {Product} may blunt the CV effects of several therapeutic agents used to treat these medical conditions (e.g., diuretics, ACE inhibitors, or angiotensin receptor blockers [ARBs]).
- Avoid the use of {Product} in patients with severe heart failure unless the benefits are expected to outweigh the risk of worsening heart failure. If {Product} is used in patients with severe heart failure, monitor patients for signs of worsening heart failure.
17 PCI/PI/MG (Patient Counseling Information/Patient Information/Medication Guide)
MG - Includes new safety information pertaining to the risks of Cardiovascular Thrombotic Events, Heart Failure and Edema.
- Advise patients to be alert for the symptoms of cardiovascular thrombotic events, including chest pain, shortness of breath, weakness, or slurring of speech, and to report any of these symptoms to their healthcare provider immediately.
- Advise patients to be alert for the symptoms of congestive heart failure including shortness of breath, unexplained weight gain, or edema and to contact their healthcare provider if such symptoms occur.