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Medical Disclaimer: This information is for educational purposes only and is not a substitute for professional medical advice.
Brand Name
Fenopron
Generic Name
Fenoprofen Calcium
Active Ingredient
FenoprofenCategory
Other
Salt Form
Calcium
Variants
1
Different strengths and dosage forms
| Strength | Form | Route | NDC |
|---|---|---|---|
| 300 mg/1 | CAPSULE | ORAL | 61825-311 |
Detailed information about Fenopron
This page is for informational purposes only and does not replace medical advice. Before using any prescription or over-the-counter medication for Fenopron, you must consult a qualified healthcare professional.
Fenoprofen is a nonsteroidal anti-inflammatory drug (NSAID) of the propionic acid class used primarily for the management of rheumatoid arthritis, osteoarthritis, and mild to moderate pain symptoms.
The dosage of fenoprofen must be individualized based on the patient's clinical response, the severity of the condition being treated, and their overall health profile. Healthcare providers generally aim for the lowest effective dose for the shortest duration possible to minimize the risk of adverse effects.
The safety and effectiveness of fenoprofen in pediatric patients (children under the age of 18) have not been established. Therefore, fenoprofen is generally NOT recommended for use in children. Pediatric pain and inflammatory conditions are typically managed with other NSAIDs that have more robust safety data in younger populations, such as ibuprofen or naproxen. If a specialist determines that fenoprofen is necessary for a child, it would be considered an off-label use requiring extremely close monitoring.
Fenoprofen is primarily excreted by the kidneys. In patients with significant renal impairment, the drug and its metabolites may accumulate, increasing the risk of toxicity. Healthcare providers typically avoid prescribing fenoprofen to patients with advanced renal disease. For those with mild to moderate impairment, a reduced dose and frequent monitoring of serum creatinine and glomerular filtration rate (GFR) are essential.
Since the liver is responsible for the metabolism (glucuronidation) of fenoprofen, patients with hepatic insufficiency may require lower doses. While specific dosage adjustment scales for hepatic impairment are not standardized for fenoprofen, clinicians generally exercise caution and monitor liver enzymes (ALT/AST) closely during treatment.
Patients over the age of 65 are at a higher risk for NSAID-induced gastrointestinal bleeding and renal dysfunction. For the elderly, healthcare providers often start at the lowest end of the dosing spectrum (e.g., 200-300 mg per dose) and monitor for signs of occult blood loss or changes in kidney function.
To achieve the best results and minimize side effects, follow these specific administration guidelines:
If you miss a dose of fenoprofen, take it as soon as you remember. However, if it is almost time for your next scheduled dose, skip the missed dose and return to your regular dosing schedule. Do not double the dose to 'catch up,' as this significantly increases the risk of gastrointestinal irritation and other side effects.
An overdose of fenoprofen can be serious. Symptoms of an acute NSAID overdose may include:
In the event of a suspected overdose, contact emergency services or a poison control center immediately. Management usually involves supportive care, gastric lavage (if performed shortly after ingestion), and the administration of activated charcoal to prevent further absorption.
> Important: Follow your healthcare provider's dosing instructions exactly. Do not adjust your dose or stop the medication without medical guidance, as this could lead to a return of inflammatory symptoms.
Like all NSAIDs, fenoprofen is most frequently associated with gastrointestinal and central nervous system side effects. Many of these symptoms are dose-dependent and may resolve as the body adjusts to the medication.
These effects occur in a smaller percentage of the population but still require clinical awareness:
Rare but documented side effects include:
> Warning: Stop taking Fenoprofen and call your doctor immediately or seek emergency care if you experience any of the following:
Prolonged use of fenoprofen increases the cumulative risk of several conditions:
Fenoprofen carries the standard FDA Black Box Warning for all non-aspirin NSAIDs:
Report any unusual symptoms or persistent side effects to your healthcare provider immediately to ensure your treatment remains safe and effective.
Fenoprofen is a potent medication that requires careful clinical oversight. It is not a simple 'painkiller' and carries significant systemic risks, particularly for the heart, kidneys, and digestive tract. Patients must be screened for cardiovascular risk factors, history of gastrointestinal disease, and renal function before starting therapy. It is vital to use the lowest effective dose for the shortest possible duration to mitigate these risks.
As mandated by the FDA, Fenoprofen includes a Black Box Warning regarding Cardiovascular and Gastrointestinal risks.
Patients with the 'aspirin triad' (asthma, nasal polyps, and aspirin sensitivity) should never take fenoprofen. A severe, potentially life-threatening allergic reaction called anaphylaxis can occur. If you experience hives, facial swelling, or wheezing, seek emergency care immediately.
Anemia is sometimes seen in patients receiving NSAIDs. This may be due to fluid retention, occult or gross GI blood loss, or an incompletely described effect upon erythropoiesis (red blood cell production). Fenoprofen also inhibits platelet aggregation and can prolong bleeding time, though to a lesser extent than aspirin.
Patients on long-term fenoprofen therapy should undergo regular medical monitoring, including:
Fenoprofen may cause somnolence (drowsiness), dizziness, or vision changes in some patients. You should not drive, operate heavy machinery, or engage in potentially hazardous activities until you know how the medication affects you. If you experience significant drowsiness, consult your doctor about adjusting your dose or timing.
Consumption of alcohol while taking fenoprofen significantly increases the risk of gastrointestinal bleeding and stomach ulcers. Alcohol acts as a gastric irritant, and when combined with the prostaglandin-inhibiting effects of fenoprofen, the protective lining of the stomach is doubly compromised. It is generally advised to avoid or strictly limit alcohol during treatment.
While fenoprofen does not typically cause a 'withdrawal syndrome' like opioids, stopping it suddenly can lead to a rapid return of inflammatory symptoms and pain. If you have been taking high doses for a long period, your doctor may suggest a gradual taper to monitor the return of symptoms.
> Important: Discuss all your medical conditions, especially heart disease, high blood pressure, or a history of stomach ulcers, with your healthcare provider before starting Fenoprofen.
Certain medications should never be combined with fenoprofen due to the extreme risk of adverse events:
Fenoprofen and its metabolites may interfere with certain laboratory tests:
For each major interaction, the mechanism typically involves either a pharmacodynamic effect (additive risk of bleeding) or a pharmacokinetic effect (competition for renal excretion or protein binding). Management usually involves dose adjustment, increased monitoring, or choosing an alternative medication.
> Important: Tell your doctor about ALL medications, supplements, and herbal products you are taking, including over-the-counter pain relievers like ibuprofen or naproxen.
Fenoprofen must NEVER be used in the following circumstances:
Conditions requiring a careful risk-benefit analysis by a healthcare professional include:
There is a high degree of cross-sensitivity between fenoprofen and other NSAIDs. If a patient has had a severe reaction to ibuprofen, naproxen, or diclofenac, they are highly likely to react to fenoprofen. This cross-reactivity extends to both allergic symptoms (rashes, bronchospasm) and the risk of gastrointestinal injury.
> Important: Your healthcare provider will evaluate your complete medical history, including any past reactions to pain medications, before prescribing Fenoprofen.
Data on the excretion of fenoprofen into human milk are limited. However, most propionic acid derivative NSAIDs are excreted in very small amounts. Because of the potential for serious adverse reactions in nursing infants (such as prostaglandin inhibition effects), a decision should be made whether to discontinue nursing or discontinue the drug, taking into account the importance of the drug to the mother.
Fenoprofen is not approved for use in children under 18 years of age. The lack of safety and efficacy data means that other treatments are preferred for juvenile idiopathic arthritis or pediatric pain. If used off-label, growth and renal function must be monitored with extreme care.
Elderly patients (65 and older) are at significantly higher risk for serious NSAID-related complications.
Fenoprofen should be used with extreme caution in patients with pre-existing kidney disease. In patients with a GFR below 30 mL/min, use is generally avoided. For those with mild impairment (GFR 30-60 mL/min), the dose should be reduced, and renal function (creatinine/BUN) should be checked within days of starting therapy. Fenoprofen is not significantly removed by hemodialysis.
In patients with chronic liver disease (Child-Pugh Class A or B), the protein-binding capacity of albumin may be reduced, leading to higher levels of 'free' (active) fenoprofen. This increases the risk of toxicity even at standard doses. In severe hepatic impairment (Child-Pugh Class C), the use of fenoprofen is generally not recommended.
> Important: Special populations require individualized medical assessment and more frequent monitoring than the general population.
Fenoprofen calcium is a non-selective inhibitor of the enzymes cyclooxygenase-1 (COX-1) and cyclooxygenase-2 (COX-2). At the molecular level, it competes with arachidonic acid for the active site of the COX enzymes. By binding to these enzymes, fenoprofen prevents the synthesis of cyclic endoperoxides, which are the precursors to prostaglandins, prostacyclin, and thromboxanes. The reduction in prostaglandin E2 (PGE2) in the joints reduces the recruitment of inflammatory cells and the sensitization of pain fibers. Its analgesic effect is primarily peripheral, though some secondary central mechanisms may contribute to pain modulation.
| Parameter | Value |
|---|---|
| Bioavailability | >85% (Rapidly absorbed) |
| Protein Binding | 99% (Primarily to Albumin) |
| Half-life | 2 - 3 hours |
| Tmax | 1 - 2 hours (Fasting) |
| Metabolism | Hepatic (Glucuronidation) |
| Excretion | Renal (90% as metabolites) |
Fenoprofen is a member of the Propionic Acid Derivative class of Nonsteroidal Anti-inflammatory Drugs (NSAIDs). It is therapeutically categorized as an analgesic and antirheumatic agent. Related medications in this specific chemical class include Ibuprofen, Naproxen, Ketoprofen, and Flurbiprofen.
Common questions about Fenopron
Fenoprofen is primarily prescribed by healthcare providers to manage the symptoms of rheumatoid arthritis and osteoarthritis, including joint pain, swelling, and stiffness. It is also FDA-approved for the relief of mild to moderate pain from various causes, such as dental procedures or musculoskeletal injuries. As an NSAID, it works by reducing the production of prostaglandins, which are chemicals in the body that signal pain and trigger inflammation. It is important to note that while fenoprofen treats the symptoms of arthritis, it does not cure the underlying condition. Your doctor will determine if this medication is appropriate based on your specific diagnosis and medical history.
The most frequently reported side effects of fenoprofen involve the digestive and nervous systems. Many patients experience dyspepsia (indigestion), nausea, or abdominal discomfort, which can often be managed by taking the medication with food or milk. Central nervous system effects such as somnolence (drowsiness), dizziness, and headache are also quite common. Some individuals may notice changes in bowel habits, such as constipation or diarrhea. While these common side effects are usually mild, any persistent or worsening symptoms should be discussed with a healthcare professional to ensure the treatment is being tolerated well.
It is strongly recommended to avoid or strictly limit alcohol consumption while taking fenoprofen. Both alcohol and fenoprofen can irritate the lining of the stomach and intestines. When used together, they significantly increase the risk of developing gastrointestinal ulcers and potentially life-threatening stomach bleeding. Furthermore, alcohol can increase the risk of liver toxicity and may worsen the dizziness or drowsiness caused by the medication. If you regularly consume alcohol, you must discuss this with your doctor before starting any NSAID therapy to assess your personal risk level.
Fenoprofen is generally not recommended during pregnancy, especially during the third trimester. Starting at 30 weeks of gestation, fenoprofen must be avoided entirely because it can cause the premature closure of the ductus arteriosus in the fetal heart and lead to serious kidney problems in the unborn baby. During the first and second trimesters, it should only be used if specifically prescribed by a doctor who has weighed the risks and benefits. There is some evidence suggesting that NSAID use in early pregnancy might increase the risk of miscarriage. Always consult your obstetrician before taking any pain or anti-inflammatory medication while pregnant.
The time it takes for fenoprofen to work depends on the condition being treated. For acute pain relief, such as a headache or dental pain, you may begin to feel the effects within 30 to 60 minutes after taking a dose. However, for chronic conditions like rheumatoid arthritis or osteoarthritis, it often takes longer to see the full therapeutic benefit. Most patients require two to three weeks of consistent daily use before they notice a significant reduction in joint swelling and morning stiffness. It is important to continue taking the medication as prescribed, even if you do not feel immediate relief in your arthritis symptoms.
Fenoprofen is not an addictive medication, and stopping it suddenly does not cause a physical withdrawal syndrome like opioids do. However, if you are taking it for a chronic condition like arthritis, stopping the medication abruptly will likely cause a rapid return of your pain, swelling, and stiffness. If you wish to discontinue the medication, it is best to consult your healthcare provider first. They may suggest a gradual reduction in dose or help you transition to an alternative therapy to ensure your symptoms remain under control during the process.
If you miss a dose of fenoprofen, take it as soon as you remember. If it is almost time for your next scheduled dose, you should skip the missed dose and simply take your next dose at the regular time. Never take two doses at once or 'double up' to make up for a missed one, as this increases the likelihood of stomach irritation and other side effects. To help prevent missed doses, try taking your medication at the same time every day, perhaps in conjunction with a daily routine like eating breakfast or dinner.
Fenoprofen does not typically cause weight gain in the form of increased body fat. However, like other NSAIDs, it can cause the body to retain sodium and water, which may lead to 'fluid weight' and swelling (edema) in the hands, ankles, or feet. This fluid retention can cause a slight increase on the scale. If you notice sudden or significant weight gain, or if you experience swelling accompanied by shortness of breath, you should contact your doctor immediately. This could be a sign that the medication is affecting your heart or kidney function, particularly if you have pre-existing health conditions.
Fenoprofen has several significant drug interactions that must be managed by a healthcare provider. It should not be taken with other NSAIDs, such as ibuprofen or naproxen, as this increases the risk of side effects without adding benefit. It can also interact dangerously with blood thinners like warfarin, increasing the risk of bleeding. Other notable interactions include lithium, methotrexate, and certain blood pressure medications like ACE inhibitors or diuretics. Always provide your doctor and pharmacist with a complete list of all medications, supplements, and herbal products you are taking to prevent harmful interactions.
Yes, fenoprofen is available as a generic medication in both capsule and tablet forms. Generic versions are typically more cost-effective than brand-name versions like Nalfon while containing the same active ingredient and meeting the same FDA standards for quality and bioequivalence. Availability may vary by pharmacy, so it is a good idea to check with your local pharmacist. Most insurance plans cover the generic version of fenoprofen, but you should verify your specific coverage and any potential co-pays with your insurance provider.
Other drugs with the same active ingredient (Fenoprofen)