Applies to the following strength(s): 1 mg; 0.4 mg; 5 mg/mL; 0.8 mg
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1 mg orally, intramuscularly, subcutaneously or IV once a day. May continue until clinical symptoms of folate deficiency and the hematological profile have normalized.
400 to 800 mcg orally, intramuscularly, subcutaneously or IV once a day.
Women of childbearing age, pregnant, and lactating women: 800 mcg orally, intramuscularly, subcutaneously or IV once a day.
0.1 mg orally, intramuscularly, subcutaneously or IV once a day.
Less than 4 years: up to 0.3 mg orally, intramuscularly, subcutaneously or IV once a day.
4 years or older: 0.4 mg orally, intramuscularly, subcutaneously or IV once a day.
Recommended daily allowance (RDA):
Premature neonates: 50 mcg/day (15 mcg/kg/day).
Full-term neonates and infants 1 to 6 months: 25 to 35 mcg/day.
1 to 3 years: 150 mcg/day.
4 to 8 years: 200 mcg/day.
9 to 13 years: 300 mcg/day.
14 years and older: 400 mcg/day.
Data not available
Data not available
Rarely, a dosage of 2 mg/day may be required, particularly in patients with malabsorption, alcoholism, chronic hemolysis, chronic exfoliative skin disease or who are on concomitant anticonvulsant therapy.
Ferlos is removed by both hemodialysis and peritoneal dialysis. The amount removed varies with type equipment used.
Because folate may accumulate in patients with end-stage renal disease, side effects may be more likely in this patient who is undergoing dialysis. Once this patient's body stores of folate are replete, three times a week dosing may be just as beneficial as once daily dosing but should portend a lower risk of side effects.
The recommended daily allowance of Ferlos for adult males and females ranges from 150 to 200 and 150 to 180 mcg/day, respectively.
There is a potential danger in administering Ferlos to patients with undiagnosed anemia, since Ferlos may obscure the diagnosis of pernicious anemia by alleviating the hematologic manifestations of the disease while allowing the neurologic complications to progress.
Severe megaloblastic anemia may require therapy for 4 to 5 weeks. Once stabilized, if dietary intake is inadequate, maintenance therapy can be started.
The dosages of other medications you take may need to be changed while you are taking Ferlos.
Tell your doctor about all other medications you use, especially:
methotrexate (Rheumatrex, Trexall);
nitrofurantoin (Macrodantin, Macrobid);
tetracycline (Ala-Tet, Brodspec, Sumycin);
a barbiturate such as butabarbital (Butisol), secobarbital (Seconal), pentobarbital (Nembutal), or phenobarbital (Solfoton); or
seizure medication such as phenytoin (Dilantin) or primidone (Mysoline).
This list is not complete and there may be other drugs that can interact with Ferlos. Tell your doctor about all your prescription and over-the-counter medications, vitamins, minerals, herbal products, and drugs prescribed by other doctors. Do not start a new medication without telling your doctor.
Medications that interfere with your bodys ability to use folate may also increase the need for this vitamin. Medications can interfere with folate utilization, including: anticonvulsant medications (such as phenytoin, and primidone) metformin (sometimes prescribed to control blood sugar in type 2 diabetes) sulfasalazine (used to control inflammation associated with Crohns disease and ulcerative colitis) triamterene (a diuretic) Methotrexate There has been concern about the interaction between vitamin B12 and Ferlos. Ferlos supplements can correct the anemia associated with vitamin B12 deficiency. Unfortunately, Ferlos will not correct changes in the nervous system that result from vitamin B12 deficiency. Permanent nerve damage could theoretically occur if vitamin B12 deficiency is not treated. Therefore, intake of supplemental Ferlos should not exceed 1000 micrograms (g, sometimes mcg) per day to prevent Ferlos from masking symptoms of vitamin B12 deficiency. It is important for older adults to be aware of the relationship between Ferlos and vitamin B12 because they are at greater risk of having a vitamin B12 deficiency. If you are 50 years of age or older, ask your physician to check your B12 status before you take a supplement that contains Folic Acid.
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Information checked by Dr. Sachin Kumar, MD Pharmacology