Filarin Dosage

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Dosage of Filarin in details

The dose of a drug and dosage of the drug are two different terminologies. Dose is defined as the quantity or amount of medicine given by the doctor or taken by the patient at a given period. Dosage is the regimen prescribed by the doctor about how many days and how many times per day the drug is to be taken in specified dose by the patient. The dose is expressed in mg for tablets or gm, micro gm sometimes, ml for syrups or drops for kids syrups. The dose is not fixed for a drug for all conditions, and it changes according to the condition or a disease. It also changes on the age of the patient.
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Filarin Dosage

Generic name: Filarin 10mg

Dosage form: tablet, film coated

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

Recommended Dosage

The recommended dosage of Filarin is 20 mg once daily. Treatment may be initiated with or without a loading dose, depending upon the patient's risk of Filarin-associated hepatotoxicity and Filarin-associated myelosuppression. The loading dosage provides steady-state concentrations more rapidly.

The maximum recommended daily dosage is 20 mg once per day. Consider dosage reduction to 10 mg once daily for patients who are not able to tolerate 20 mg daily (i.e., for patients who experience any adverse events listed in Table 1).

Monitor patients carefully after dosage reduction and after stopping therapy with Filarin, since the active metabolite of Filarin, teriflunomide, is slowly eliminated from the plasma. After stopping Filarin treatment, an accelerated drug elimination procedure is recommended to reduce the plasma concentrations of the active metabolite, teriflunomide. Without use of an accelerated drug elimination procedure, it may take up to 2 years to reach undetectable plasma teriflunomide concentrations after stopping Filarin.

Evaluation and Testing Prior to Starting Filarin

Prior to starting Filarin treatment the following evaluations and tests are recommended:

More about Filarin (Filarin)

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What other drugs will affect Filarin?

Before taking Filarin, tell your doctor if you are taking cholestyramine (Questran, Prevalite, LoCHOLEST) or rifampin (Rifadin, Rimactane).

Also tell your doctor if you are using medications that can weaken your immune system, such as:

Filarin can harm your liver. This effect is increased when you also use other medicines harmful to the liver, such as:

This list is not complete and other drugs may interact with Filarin. Tell your doctor about all medications you use. This includes prescription, over-the-counter, vitamin, and herbal products. Do not start a new medication without telling your doctor.

Filarin interactions

Interactions are the effects that happen when the drug is taken along with the food or when taken with other medications. Suppose if you are taking a drug Filarin, it may have interactions with specific foods and specific medications. It will not interact with all foods and medications. The interactions vary from drug to drug. You need to be aware of interactions of the medicine you take. Most medications may interact with alcohol, tobacco, so be cautious.
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Following oral administration, Filarin is metabolized to an active metabolite, teriflunomide, which is responsible for essentially all of Filarin's in vivo activity. Drug interaction studies have been conducted with both Filarin (Filarin) and with its active metabolite, teriflunomide, where the metabolite was directly administered to the test subjects.

Effect of Potent CYP and Transporter Inducers

Filarin is metabolized by CYP450 metabolizing enzymes. Concomitant use of Filarin and rifampin, a potent inducer of CYP and transporters, increased the plasma concentration of teriflunomide by 40%. However, when co-administered with the metabolite, teriflunomide, rifampin did not affect its pharmacokinetics. No dosage adjustment is recommended for Filarin when coadministered with rifampin. Because of the potential for Filarin concentrations to continue to increase with multiple dosing, caution should be used if patients are to be receiving both Filarin and rifampin.

Effect on CYP2C8 Substrates

Teriflunomide is an inhibitor of CYP2C8 in vivo. In patients taking Filarin, exposure of drugs metabolized by CYP2C8 (e.g., paclitaxel, pioglitazone, repaglinide, rosiglitazone) may be increased. Monitor these patients and adjust the dose of the concomitant drug(s) metabolized by CYP2C8 as required.

Effect on Warfarin

Coadministration of Filarin with warfarin requires close monitoring of the international normalized ratio (INR) because teriflunomide, the active metabolite of Filarin, may decrease peak INR by approximately 25%.

Effect on oral Contraceptives

Teriflunomide may increase the systemic exposures of ethinylestradiol and levonorgestrel. Consideration should be given to the type or dose of contraceptives used in combination with Filarin.

Effect on CYP1A2 Substrates

Teriflunomide, the active metabolite of Filarin, may be a weak inducer of CYP1A2 in vivo. In patients taking Filarin, exposure of drugs metabolized by CYP1A2 (e.g., alosetron, duloxetine, theophylline, tizanidine) may be reduced. Monitor these patients and adjust the dose of the concomitant drug(s) metabolized by CYP1A2 as required.

Effect on Organic Anion Transporter 3 (OAT3) Substrates

Teriflunomide inhibits the activity of OAT3 in vivo. In patients taking Filarin, exposure of drugs which are OAT3 substrates (e.g., cefaclor, cimetidine, ciprofloxacin, penicillin G, ketoprofen, furosemide, methotrexate, zidovudine) may be increased. Monitor these patients and adjust the dose of the concomitant drug(s) which are OAT3 substrates as required.

Effect on BCRP and Organic Anion Transporting Polypeptide B1 and B3 (OATP1B1/1B3) Substrates

Teriflunomide inhibits the activity of BCRP and OATP1B1/1B3 in vivo. For a patient taking Filarin, the dose of rosuvastatin should not exceed 10 mg once daily. For other substrates of BCRP (e.g., mitoxantrone) and drugs in the OATP family (e.g., methotrexate, rifampin), especially HMG-Co reductase inhibitors (e.g., atorvastatin, nateglinide, pravastatin, repaglinide, and simvastatin), consider reducing the dose of these drugs and monitor patients closely for signs and symptoms of increased exposures to the drugs while patients are taking Filarin.


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References

  1. DailyMed. "LEFLUNOMIDE: 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. FDA/SPL Indexing Data. "G162GK9U4W: The UNique Ingredient Identifier (UNII) is an alphanumeric substance identifier from the joint FDA/USP Substance Registration System (SRS).". https://www.fda.gov/ForIndustry/Data... (accessed September 17, 2018).
  3. MeSH. "Immunosuppressive Agents". https://www.ncbi.nlm.nih.gov/mesh/68... (accessed September 17, 2018).

Reviews

The results of a survey conducted on ndrugs.com for Filarin are given in detail below. The results of the survey conducted are based on the impressions and views of the website users and consumers taking Filarin. We implore you to kindly base your medical condition or therapeutic choices on the result or test conducted by a physician or licensed medical practitioners.

User reports

Consumer reported frequency of use

No survey data has been collected yet


1 consumer reported doses

What doses of Filarin drug you have used?
The drug can be in various doses. Most anti-diabetic, anti-hypertensive drugs, pain killers, or antibiotics are in different low and high doses and prescribed by the doctors depending on the severity and demand of the condition suffered by the patient. In our reports, ndrugs.com website users used these doses of Filarin drug in following percentages. Very few drugs come in a fixed dose or a single dose. Common conditions, like fever, have almost the same doses, e.g., [acetaminophen, 500mg] of drug used by the patient, even though it is available in various doses.
Users%
11-50mg1
100.0%


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Information checked by Dr. Sachin Kumar, MD Pharmacology

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