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Note: This document contains side effect information about fenoprofen. Some of the dosage forms listed on this page may not apply to the brand name Nalfon.
Common side effects of Nalfon include: drowsiness and headache. Other side effects include: asthenia, constipation, dizziness, dyspepsia, heartburn, myalgia, myasthenia, nausea, nervousness, palpitations, prolonged bleeding time, pruritus, and vomiting. See below for a comprehensive list of adverse effects.
Applies to fenoprofen: oral capsule, oral tablet
Oral route (Capsule)
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. Fenoprofen is contraindicated in the setting of CABG surgery. NSAIDs also 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.
Along with its needed effects, fenoprofen (the active ingredient contained in Nalfon) may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.
Check with your doctor immediately if any of the following side effects occur while taking fenoprofen:
Symptom of overdose
Some side effects of fenoprofen may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:
Applies to fenoprofen: compounding powder, oral capsule, oral tablet
The most frequently reported side effects were dyspepsia, headache, somnolence, nausea, dizziness, constipation, nervousness, asthenia, and peripheral edema.
Very common (10% or more): Dyspepsia (10.3%)
Common (1% to 10%): Nausea, constipation, vomiting, abdominal pain, diarrhea
Frequency not reported: Gastritis, peptic ulcer, peptic ulcer with perforation, gastrointestinal (GI) hemorrhage, GI bleeding, flatulence, dry mouth, blood in stool, buccal mucosa aphthous ulcerations, pancreatitis, burning tongue, melena, hematemesis, ulcerative stomatitis, Crohn's disease exacerbated, colitis exacerbated
Common (1% to 10%): Palpitations
Frequency not reported: Atrial fibrillation, electrocardiographic changed, supraventricular tachycardia, tachycardia, hypertension, cardiac failure
Frequency not reported: Renal failure, cystitis, azotemia, interstitial nephritis, nephrosis, papillary necrosis, nephrotoxicity, nephrotic syndrome
Frequency not reported: Dysuria, hematuria, oliguria, anuria, mastodynia, breast pain
Frequency not reported: SGOT/AST increased, jaundice, cholestatic hepatitis, abnormal liver function
Common (1% to 10%): Dyspnea, upper respiratory infection, nasopharyngitis
Frequency not reported: Pulmonary edema
Common (1% to 10%): Headache, somnolence, dizziness, tremor
Frequency not reported: Taste metallic, seizure, trigeminal neuralgia, paresthesia, drowsiness
Common (1% to 10%): Confusion, nervousness
Frequency not reported: Depression, disorientation, insomnia, personality changed, hallucinations
Common (1% to 10%): Sweating increased, pruritus, rash
Frequency not reported: Angioedema, purpura, bruising, exfoliative dermatitis, toxic epidermal necrolysis, Stevens-Johnson syndrome, alopecia, urticaria, photosensitivity, sweating increased
Frequency not reported: Hypersensitivity reaction
Frequency not reported: Anaphylaxis
Frequency not reported: Hemorrhage, thrombocytopenia, hemolytic anemia, aplastic anemia, agranulocytosis, pancytopenia, lymphadenopathy, neutropenia
Common (1% to 10%): Tinnitus, decreased hearing, asthenia, peripheral edema, fatigue
Frequency not reported: Alkaline phosphatase increased, LDH increased, malaise, fever, aseptic meningitis, tinnitus, hearing decreased, vertigo, aseptic meningitis
Common (1% to 10%): Vision blurred
Frequency not reported: Diplopia, optic neuritis, vision disturbed, optic neuritis, amblyopia, diplopia
Frequency not reported: Anorexia