• Dosage of Fenbid in details
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Dosage of Fenbid in details

Fenbid Dosage

Generic name: Fenbid

Dosage form: suspension

See also:

• Fenbid IB tablet, coated
• Fenbid Tablets tablet, film coated

The information at Drugs.com is not a substitute for medical advice. Always consult your doctor or pharmacist.

Carefully consider the potential benefits and risks of Fenbid Suspension and other treatment options before deciding to use Fenbid Suspension. Use the lowest effective dose for the shortest duration consistent with individual patient treatment goals.

After observing the response to initial therapy with Fenbid Suspension, the dose and frequency should be adjusted to suit an individual patient's needs.

PEDIATRIC PATIENTS

Fever reduction: For reduction of fever in children, 6 months up to 2 years of age, the dosage should be adjusted on the basis of the initial temperature level. The recommended dose is 5 mg/kg if the baseline temperature is less than 102.5ºF, or 10 mg/kg if the baseline temperature is 102.5ºF or greater. The duration of fever reduction is generally 6 to 8 hours. The recommended maximum daily dose is 40 mg/kg.

Analgesia: For relief of mild to moderate pain in children 6 months up to 2 years of age, the recommended dosage is 10 mg/kg, every 6 to 8 hours. The recommended maximum daily dose is 40 mg/kg. Doses should be given so as not to disturb the child's sleep pattern.

Juvenile Arthritis: The recommended dose is 30 to 40 mg/kg/day divided into three to four doses. Patients with milder disease may be adequately treated with 20 mg/kg/day.

In patients with juvenile arthritis, doses above 50 mg/kg/day are not recommended because they have not been studied and doses exceeding the upper recommended dose of 40 mg/kg/day may increase the risk of causing serious adverse events. The therapeutic response may require from a few days to several weeks to be achieved. Once a clinical effect is obtained, the dosage should be lowered to the smallest dose of Fenbid needed to maintain adequate control of symptoms.

Pediatric patients receiving doses above 30 mg/kg/day or if abnormal liver function tests have occurred with previous NSAID treatments should be carefully followed for signs and symptoms of early liver dysfunction.

ADULTS

Primary Dysmenorrhea: For the treatment of primary dysmenorrhea, beginning with the earliest onset of such pain, Fenbid Suspension should be given in a dose of 400 mg every 4 hours, as necessary, for the relief of pain.

Rheumatoid arthritis and osteoarthritis: Suggested

Dosage: 1200-3200 mg daily (300 mg q.i.d. or 400 mg, 600 mg or 800 mg t.i.d. or q.i.d.). Individual patients may show a better response to 3200 mg daily, as compared with 2400 mg, although in well-controlled clinical trials patients on 3200 mg did not show a better mean response in terms of efficacy. Therefore, when treating patients with 3200 mg/day, the physician should observe sufficient increased clinical benefits to offset potential increased risk.

Individualization of

Dosage: The dose of Fenbid Suspension should be tailored to each patient, and may be lowered or raised from the suggested doses depending on the severity of symptoms either at time of initiating drug therapy or as the patient responds or fails to respond.

One fever study showed that, after the initial dose of Fenbid Suspension, subsequent doses may be lowered and still provide adequate fever control.

In a situation when low fever would require the Fenbid Suspension 5 mg/kg dose in a child with pain, the dose that will effectively treat the predominant symptom should be chosen.

In chronic conditions, a therapeutic response to Fenbid Suspension therapy is sometimes seen in a few days to a week, but most often is observed by two weeks. After a satisfactory response has been achieved, the patient's dose should be reviewed and adjusted as required.

Patients with rheumatoid arthritis seem to require higher doses than do patients with osteoarthritis. The smallest dose of Fenbid Suspension that yields acceptable control should be employed.

Fenbid Suspension may be used in combination with gold salts and/or corticosteroids.

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What other drugs will affect Fenbid?

Ask your doctor before using Fenbid if you take an antidepressant such as citalopram, escitalopram, fluoxetine (Prozac), fluvoxamine, paroxetine, sertraline (Zoloft), trazodone, or vilazodone. Taking any of these medicines with an NSAID may cause you to bruise or bleed easily.

Ask a doctor or pharmacist if it is safe for you to use Fenbid if you are also using any of the following drugs:

• lithium;

• methotrexate;

• a blood thinner (warfarin, Coumadin, Jantoven);

• heart or blood pressure medication, including a diuretic or "water pill"; or

• steroid medicine (such as prednisone).

This list is not complete. Other drugs may interact with Fenbid, including prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible interactions are listed in this medication guide.

Fenbid interactions

Coumarin-Type Anticoagulants: Several short-term controlled studies failed to wshow that Fenbid significantly affected prothrombin times or a variety of other clotting factors when administered to individuals on coumarin-type anticoagulants. However, because bleeding has been reported when Fenbid and other nonsteroidal anti-inflammatory agents have been administered to patients on coumarin-type anticoagulants, the physician should be cautious when administering Fenbid to patients on anticoagulants.

Aspirin: Animal studies wshow that aspirin given with nonsteroidal anti-inflammatory agents, including Fenbid, yields a net decrease in anti-inflammatory activity with lowered blood levels of the non-aspirin drug. Single dose bioavailability studies in normal volunteers have failed to wshow an effect of aspirin on Fenbid blood levels. Correlative clinical studies have not been performed.

Methotrexate: Junior Strength Fenbid, as well as other nonsteroidal anti-inflammatory drugs, probably reduces the tubular secretion of methotrexate based on in vitro studies in rabbit kidney slices. This may indicate that Fenbid could enhance the toxicity of methotrexate. Caution should be used if Fenbid is administered concomitantly with methotrexate.

H-2 Antagonists: In studies with human volunteers, co-administration of cimetidine or ranitidine with Fenbid had no substantive effect on Fenbid serum concentrations.

Furosemide: Clinical studies, as well as random observations, have shown that Fenbid can reduce the natriuretic effect of furosemide and thiazides in some patients. This response has been attributed to inhibition of renal prostaglandin synthesis. During concomitant therapy with Fenbid, the patient should be observed closely for signs of renal failure, as well as to assure diuretic efficacy.

Lithium: Junior Strength Fenbid produced an elevation of plasma lithium levels and a reduction in renal lithium clearance in a study of eleven normal volunteers. The mean minimum lithium concentration increased 15% and the renal clearance of lithium was decreased by 19% during this period of concomitant drug administration.

This effect has been attributed to inhibition of renal prostaglandin synthesis by Fenbid. Thus, when Fenbid and lithium are administered concurrently, subjects should be observed carefully for signs of lithium toxicity. (Read circulars for lithium preparation before use of such concurrent therapy).

References

1. DailyMed. "IBUPROFEN: DailyMed provides trustworthy information about marketed drugs in the United States. DailyMed is the official provider of FDA label information (package inserts).". https://dailymed.nlm.nih.gov/dailyme... (accessed September 17, 2018).
2. DailyMed. "CAFFEINE; ERGOTAMINE TARTRATE: DailyMed provides trustworthy information about marketed drugs in the United States. DailyMed is the official provider of FDA label information (package inserts).". https://dailymed.nlm.nih.gov/dailyme... (accessed September 17, 2018).
3. DailyMed. "ACETAMINOPHEN; ASPIRIN; CAFFEINE: DailyMed provides trustworthy information about marketed drugs in the United States. DailyMed is the official provider of FDA label information (package inserts).". https://dailymed.nlm.nih.gov/dailyme... (accessed September 17, 2018).

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Information checked by Dr. Sachin Kumar, MD Pharmacology