Complete adverse effect profile including incidence rates and management
Important Safety Information
This is not a complete list of all possible side effects. Contact your healthcare provider if you experience any unexpected symptoms. For serious or life-threatening side effects, seek emergency medical attention immediately.
ADVERSE REACTIONS The following adverse reactions are discussed in greater detail in other sections of the labeling: Cardiovascular Thrombotic Events (see Warnings ) GI Bleeding, Ulceration and Perforation (see Warnings ) Hepatotoxicity (see Warnings ) Hypertension (see Warnings ) Heart Failure and Edema (see Warnings ) Renal Toxicity and Hyperkalemia (see Warnings ) Anaphylactic Reactions (see Warnings ) Serious Skin Reactions (see Warnings ) Hematologic Toxicity (see Warnings ) Clinical Trials Experience Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in practice.
In patients taking mefenamic acid or other NSAIDs, the most frequently reported adverse experiences occurring in approximately 1 to 10% of patients are: Gastrointestinal experiences including - abdominal pain, constipation, diarrhea, dyspepsia, flatulence, gross bleeding/perforation, heartburn, nausea, GI ulcers (gastric/duodenal), vomiting, abnormal renal function, anemia, dizziness, edema, elevated liver enzymes, headaches, increased bleeding time, pruritus, rashes, tinnitus Additional adverse experiences reported occasionally and listed here by body system include: Body as a whole Fever, infection, sepsis Cardiovascular system Congestive heart failure, hypertension, tachycardia, syncope Digestive system Dry mouth, esophagitis, gastric/peptic ulcers, gastritis, gastrointestinal bleeding, glossitis, hematemesis, hepatitis, jaundice Hemic and lymphatic system Ecchymosis, eosinophilia, leukopenia, melena, purpura, rectal bleeding, stomatitis, thrombocytopenia Metabolic and nutritional Weight changes Nervous system Anxiety, asthenia, confusion, depression, dream abnormalities, drowsiness;
insomnia, malaise, nervousness, paresthesia, somnolence, tremors, vertigo Respiratory system Asthma, dyspnea Skin and appendages Alopecia, photosensitivity, pruritus, sweat Special senses Blurred vision Urogenital system Cystitis, dysuria, hematuria, interstitial nephritis, oliguria/polyuria, proteinuria, renal failure Other adverse reactions, which occur rarely are: Body as a whole Anaphylactoid reactions, appetite changes, death Cardiovascular system Arrhythmia, hypotension, myocardial infarction, palpitations, vasculitis Digestive system Eructation, liver failure, pancreatitis Hemic and lymphatic system Agranulocytosis, hemolytic anemia, aplastic anemia, lymph-adenopathy, pancytopenia Metabolic and nutritional Hyperglycemia Nervous system Convulsions, coma, hallucinations, meningitis.
Respiratory Respiratory depression, pneumonia Skin and appendages Angioedema, toxic epidermal necrosis, erythema multiforme, exfoliative dermatitis, Stevens-Johnson syndrome, urticaria Special senses Conjunctivitis, hearing impairment
WARNINGS 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.
Like all medications, Mefenamic Acid can cause side effects. However, not everyone who takes this medication will experience them. Many side effects are dose-dependent and may improve as your body adjusts to the medication. Others may require dose adjustment or medical attention.
Contact your healthcare provider promptly if you experience:
Seek immediate emergency medical care if you experience signs of: