Nalfon Side Effects

Generic name: fenoprofen

Medically reviewed by Drugs.com. Last updated on Aug 6, 2024.

Note: This document provides detailed information about Nalfon Side Effects associated with fenoprofen. Some dosage forms listed on this page may not apply specifically to the brand name Nalfon.

Applies to fenoprofen: oral capsule, oral tablet.

Common side effects of Nalfon

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:

Serious side effects of Nalfon

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

• dizziness, faintness, or lightheadedness when getting up suddenly from a lying or sitting position
• irregular, fast or slow, or shallow breathing
• pale or blue lips, fingernails, or skin
• rapid, deep breathing
• restlessness
• shakiness and unsteady walk
• stomach cramps
• unsteadiness, trembling, or other problems with muscle control or coordination

For healthcare professionals

Applies to fenoprofen: compounding powder, oral capsule, oral tablet.

General adverse events

The most frequently reported side effects were dyspepsia, headache, somnolence, nausea, dizziness, constipation, nervousness, asthenia, and peripheral edema.^[Ref]

Gastrointestinal

• 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^[Ref]

Cardiovascular

• Common (1% to 10%): Palpitations
• Frequency not reported: Atrial fibrillation, electrocardiographic changed, supraventricular tachycardia, tachycardia, hypertension, cardiac failure^[Ref]

Renal

• Frequency not reported: Renal failure, cystitis, azotemia, interstitial nephritis, nephrosis, papillary necrosis, nephrotoxicity, nephrotic syndrome^[Ref]

Genitourinary

• Frequency not reported: Dysuria, hematuria, oliguria, anuria, mastodynia, breast pain^[Ref]

Hepatic

• Frequency not reported: SGOT/AST increased, jaundice, cholestatic hepatitis, abnormal liver function^[Ref]

Respiratory

• Common (1% to 10%): Dyspnea, upper respiratory infection, nasopharyngitis
• Frequency not reported: Pulmonary edema^[Ref]

Nervous system

• Common (1% to 10%): Headache, somnolence, dizziness, tremor
• Frequency not reported: Taste metallic, seizure, trigeminal neuralgia, paresthesia, drowsiness^[Ref]

Psychiatric

• Common (1% to 10%): Confusion, nervousness
• Frequency not reported: Depression, disorientation, insomnia, personality changed, hallucinations^[Ref]

Dermatologic

• 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^[Ref]

Hypersensitivity

• Frequency not reported: Hypersensitivity reaction^[Ref]

Immunologic

• Frequency not reported: Anaphylaxis^[Ref]

Hematologic

• Frequency not reported: Hemorrhage, thrombocytopenia, hemolytic anemia, aplastic anemia, agranulocytosis, pancytopenia, lymphadenopathy, neutropenia^[Ref]

Other

• 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^[Ref]

Ocular

• Common (1% to 10%): Vision blurred
• Frequency not reported: Diplopia, optic neuritis, vision disturbed, optic neuritis, amblyopia, diplopia^[Ref]

Metabolic

• Frequency not reported: Anorexia^[Ref]

See also:

Further information

Nalfon side effects can vary depending on the individual. Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Note: Medication side effects may be underreported. If you are experiencing side effects that are not listed, submit a report to the FDA by following this guide.

Medical Disclaimer