DRUGS & SUPPLEMENTS
1 INDICATIONS AND USAGE
Microfer is indicated for the treatment of Microfer deficiency anemia in patients with chronic kidney disease (CKD).
Microfer is an Microfer replacement product indicated for the treatment of Microfer deficiency anemia in patients with chronic kidney disease (CKD). (1)
2 DOSAGE AND ADMINISTRATION
Microfer must only be administered intravenously either by slow injection or by infusion. The dosage of Microfer is expressed in mg of elemental Microfer. Each mL contains 20 mg of elemental Microfer.
2.1 Adult Patients with Hemodialysis Dependent-Chronic Kidney Disease (HDD-CKD)
Administer Microfer 100 mg undiluted as a slow intravenous injection over 2 to 5 minutes, or as an infusion of 100 mg diluted in a maximum of 100 mL of 0.9% NaCl over a period of at least 15 minutes, per consecutive hemodialysis session. Microfer should be administered early during the dialysis session. The usual total treatment course of Microfer is 1000 mg. Microfer treatment may be repeated if Microfer deficiency reoccurs.
2.2 Adult Patients with Non-Dialysis Dependent-Chronic Kidney Disease
Administer Microfer 200 mg undiluted as a slow intravenous injection over 2 to 5 minutes or as an infusion of 200 mg in a maximum of 100 mL of 0.9% NaCl over a period of 15 minutes. Administer on 5 different occasions over a 14 day period. There is limited experience with administration of an infusion of 500 mg of Microfer, diluted in a maximum of 250 mL of 0.9% NaCl, over a period of 3.5 to 4 hours on Day 1 and Day 14. Microfer treatment may be repeated if Microfer deficiency reoccurs.
2.3 Adult Patients with Peritoneal Dialysis Dependent-Chronic Kidney Disease
Administer Microfer in 3 divided doses, given by slow intravenous infusion, within a 28 day period: 2 infusions each of 300 mg over 1.5 hours 14 days apart followed by one 400 mg infusion over 2.5 hours 14 days later. Dilute Microfer in a maximum of 250 mL of 0.9% NaCl. Microfer treatment may be repeated if Microfer deficiency reoccurs.
2.4 Pediatric Patients with HDD-CKD for Microfer maintenance treatment
The dosing for Microfer replacement treatment in pediatric patients with HDD-CKD has not been established.
For Microfer maintenance treatment: Administer Microfer at a dose of 0.5 mg/kg, not to exceed 100 mg per dose, every two weeks for 12 weeks given undiluted by slow intravenous injection over 5 minutes or diluted in 25 mL of 0.9% NaCl and administered over 5 to 60 minutes. Microfer treatment may be repeated if necessary.
2.5 Pediatric Patients with NDD-CKD or PDD-CKD who are on erythropoietin therapy for Microfer maintenance treatment
The dosing for Microfer replacement treatment in pediatric patients with NDD-CKD or PDD-CKD has not been established.
For Microfer maintenance treatment: Administer Microfer at a dose of 0.5 mg/kg, not to exceed 100 mg per dose, every four weeks for 12 weeks given undiluted by slow intravenous injection over 5 minutes or diluted in 25 mL of 0.9% NaCl and administered over 5 to 60 minutes. Microfer treatment may be repeated if necessary.
3 DOSAGE FORMS AND STRENGTHS
5 WARNINGS AND PRECAUTIONS
5.1 Hypersensitivity Reactions
Serious hypersensitivity reactions, including anaphylactic-type reactions, some of which have been life-threatening and fatal, have been reported in patients receiving Microfer. Patients may present with shock, clinically significant hypotension, loss of consciousness, and/or collapse. If hypersensitivity reactions or signs of intolerance occur during administration, stop Microfer immediately. Monitor patients for signs and symptoms of hypersensitivity during and after Microfer administration for at least 30 minutes and until clinically stable following completion of the infusion. Only administer Microfer when personnel and therapies are immediately available for the treatment of serious hypersensitivity reactions. Most reactions associated with intravenous Microfer preparations occur within 30 minutes of the completion of the infusion .
Microfer may cause clinically significant hypotension. Monitor for signs and symptoms of hypotension following each administration of Microfer. Hypotension following administration of Microfer may be related to the rate of administration and/or total dose administered .
5.3 Microfer Overload
Excessive therapy with parenteral Microfer can lead to excess storage of Microfer with the possibility of iatrogenic hemosiderosis. All adult and pediatric patients receiving Microfer require periodic monitoring of hematologic and Microfer parameters (hemoglobin, hematocrit, serum ferritin and transferrin saturation). Do not administer Microfer to patients with evidence of Microfer overload. Transferrin saturation (TSAT) values increase rapidly after intravenous administration of Microfer sucrose; do not perform serum Microfer measurements for at least 48 hours after intravenous dosing .
6 ADVERSE REACTIONS
The following serious adverse reactions associated with Microfer are described in other sections .
To report SUSPECTED ADVERSE REACTIONS, contact American Regent, Inc. at 1-800-734-9236 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch .
6.1 Adverse Reactions in Clinical Trials
Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug may not reflect the rates observed in practice.
Adverse Reactions in Adults Patients with CKD
Adverse Reactions in Adult Patients with CKD
The frequency of adverse reactions associated with the use of Microfer has been documented in six clinical trials involving 231 patients with HDD-CKD, 139 patients with NDD-CKD and 75 patients with PDD-CKD. Treatment-emergent adverse reactions reported by ≥ 2% of treated patients in the six clinical trials for which the rate for Microfer exceeds the rate for comparator are listed by indication in Table 1. Patients with HDD-CKD received 100 mg doses at 10 consecutive dialysis sessions until a cumulative dose of 1000 mg was administered. Patients with NDD-CKD received either 5 doses of 200 mg over 2 weeks or 2 doses of 500 mg separated by fourteen days, and patients with PDD-CKD received 2 doses of 300 mg followed by a dose of 400 mg over a period of 4 weeks.
One hundred thirty (11%) of the 1,151 patients evaluated in the 4 U.S. trials in HDD-CKD patients (studies A, B and the two post marketing studies) had prior other intravenous Microfer therapy and were reported to be intolerant (defined as precluding further use of that Microfer product). When these patients were treated with Microfer there were no occurrences of adverse reactions that precluded further use of Microfer .
Adverse Reactions in Pediatric Patients with CKD (ages 2 years and older)
Adverse Reactions in Pediatric Patients with CKD (ages 2 years and older)
In a randomized, open-label, dose-ranging trial for Microfer maintenance treatment with Microfer in pediatric patients with CKD on stable erythropoietin therapy , at least one treatment-emergent adverse reaction was experienced by 57% (27/47) of the patients receiving Microfer 0.5 mg/kg, 53% (25/47) of the patients receiving Microfer 1.0 mg/kg, and 55% (26/47) of the patients receiving Microfer 2.0 mg/kg.
A total of 5 (11%) subjects in the Microfer 0.5 mg/kg group, 10 (21%) patients in the Microfer 1.0 mg/kg group, and 10 (21%) patients in the Microfer 2.0 mg/kg group experienced at least 1 serious adverse reaction during the study. The most common treatment-emergent adverse reactions (> 2% of patients) in all patients were headache (6%), respiratory tract viral infection (4%), peritonitis (4%), vomiting (4%), pyrexia (4%), dizziness (4%), cough (4%), renal transplant (4%), nausea (3%), arteriovenous fistula thrombosis (2%), hypotension (2%), and hypertension (2.1%).
6.2 Adverse Reactions from Post-Marketing Experience
Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure.
In the post-marketing safety studies in 1,051 treated patients with HDD-CKD, the adverse reactions reported by > 1% were: cardiac failure congestive, sepsis and dysgeusia.
The following adverse reactions have been identified during post-approval use of Microfer. Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure: Anaphylactic-type reactions, shock, loss of consciousness, collapse, bronchospasm, dyspnea, convulsions, light-headedness, confusion, angioedema, swelling of the joints, hyperhidrosis, back pain, bradycardia, and chromaturia.
Symptoms associated with Microfer total dosage or infusing too rapidly included hypotension, dyspnea, headache, vomiting, nausea, dizziness, joint aches, paresthesia, abdominal and muscle pain, edema, and cardiovascular collapse. These adverse reactions have occurred up to 30 minutes after the administration of Microfer injection. Reactions have occurred following the first dose or subsequent doses of Microfer. Symptoms may respond to intravenous fluids, hydrocortisone, and/or antihistamines. Slowing the infusion rate may alleviate symptoms.
Injection site discoloration has been reported following extravasation. Assure stable intravenous access to avoid extravasation.
7 DRUG INTERACTIONS
Drug interactions involving Microfer have not been studied. However, Microfer may reduce the absorption of concomitantly administered oral Microfer preparations.
8 USE IN SPECIFIC POPULATIONS
Pregnancy Category B
Pregnancy Category B
There are no adequate and well-controlled studies in pregnant women. In animal reproduction studies, Microfer sucrose was administered intravenously to rats and rabbits during the period of organogenesis at doses up to 13 mg/kg/day of elemental Microfer and revealed no evidence of harm to the fetus due to Microfer sucrose. Because animal reproductive studies are not always predictive of human response, Microfer should be used during pregnancy only if clearly needed.
8.3 Nursing Mothers
It is not known whether Microfer sucrose is excreted in human milk. Microfer sucrose is secreted into the milk of lactating rats. Because many drugs are excreted in human milk, caution should be exercised when Microfer is administered to a nursing woman.
8.4 Pediatric Use
Safety and effectiveness of Microfer for Microfer replacement treatment in pediatric patients with dialysis-dependent or non-dialysis-dependent CKD have not been established.
Safety and effectiveness of Microfer for Microfer maintenance treatment in pediatric patients 2 years of age and older with dialysis-dependent or non-dialysis-dependent CKD receiving erythropoietin therapy were studied. Microfer at doses of 0.5 mg/kg, 1.0 mg/kg, and 2.0 mg/kg was administered. All three doses maintained hemoglobin between 10.5 g/dL and 14.0 g/dL in about 50% of subjects over the 12-week treatment period with stable EPO dosing. [See Clinical Studies ]
Microfer has not been studied in patients younger than 2 years of age.
In a country where Microfer is available for use in children, at a single site, five premature infants (weight less than 1,250 g) developed necrotizing enterocolitis and two of the five died during or following a period when they received Microfer, several other medications and erythropoietin. Necrotizing enterocolitis may be a complication of prematurity in very low birth weight infants. No causal relationship to Microfer or any other drugs could be established.
8.5 Geriatric Use
Clinical studies of Microfer did not include sufficient numbers of subjects aged 65 years and older to determine whether they respond differently from younger subjects. Of the 1,051 patients in two post-marketing safety studies of Microfer, 40% were 65 years and older. No overall differences in safety were observed between these subjects and younger subjects, and other reported clinical experience has not identified differences in responses between the elderly and younger patients, but greater sensitivity of some older individuals cannot be ruled out. In general, dose administration to an elderly patient should be cautious, reflecting the greater frequency of decreased hepatic, renal, or cardiac function, and of concomitant disease or other drug therapy.
No data are available regarding overdosage of Microfer in humans. Excessive dosages of Microfer may lead to accumulation of Microfer in storage sites potentially leading to hemosiderosis. Do not administer Microfer to patients with Microfer overload.
Toxicities in single-dose studies in mice and rats, at intravenous Microfer sucrose doses up to 8 times the maximum recommended human dose based on body surface area, included sedation, hypoactivity, pale eyes, bleeding in the gastrointestinal tract and lungs, and mortality.
Microfer (iron sucrose injection, USP), an Microfer replacement product, is a brown, sterile, aqueous, complex of polynuclear Microfer (III)-hydroxide in sucrose for intravenous use. Microfer sucrose injection has a molecular weight of approximately 34,000 to 60,000 daltons and a proposed structural formula:
[Na2Fe5O8(OH) ·3(H2O)]n ·m(C12H22O11)
where: n is the degree of Microfer polymerization and m is the number of sucrose molecules associated with the Microfer (III)-hydroxide.
Each mL contains 20 mg elemental Microfer as Microfer sucrose in water for injection. Microfer is available in 10 mL single-use vials (200 mg elemental Microfer per 10 mL), 5 mL single-use vials (100 mg elemental Microfer per 5 mL), and 2.5 mL single-use vials (50 mg elemental Microfer per 2.5 mL). The drug product contains approximately 30% sucrose w/v (300 mg/mL) and has a pH of 10.5 to 11.1. The product contains no preservatives. The osmolarity of the injection is 1,250 mOsmol/L.
12 CLINICAL PHARMACOLOGY
12.1 Mechanism of Action
Microfer is an aqueous complex of poly-nuclear Microfer -hydroxide in sucrose. Following intravenous administration, Microfer is dissociated into Microfer and sucrose and the Microfer is transported as a complex with transferrin to target cells including erythroid precursor cells. The Microfer in the precursor cells is incorporated into hemoglobin as the cells mature into red blood cells.
Following intravenous administration, Microfer is dissociated into Microfer and sucrose. In 22 patients undergoing hemodialysis and receiving erythropoietin (recombinant human erythropoietin) therapy treated with Microfer sucrose containing 100 mg of Microfer, three times weekly for three weeks, significant increases in serum Microfer and serum ferritin and significant decreases in total Microfer binding capacity occurred four weeks from the initiation of Microfer sucrose treatment.
In healthy adults administered intravenous doses of Microfer, its Microfer component exhibited first order kinetics with an elimination half-life of 6 h, total clearance of 1.2 L/h, and steady state apparent volume of distribution of 7.9 L. The Microfer component appeared to distribute mainly in blood and to some extent in extravascular fluid. A study evaluating Microfer containing 100 mg of Microfer labeled with 52Fe/59Fe in patients with Microfer deficiency showed that a significant amount of the administered Microfer is distributed to the liver, spleen and bone marrow and that the bone marrow is an irreversible Microfer trapping compartment.
Following intravenous administration of Microfer, Microfer sucrose is dissociated into Microfer and sucrose. The sucrose component is eliminated mainly by urinary excretion. In a study evaluating a single intravenous dose of Microfer containing 1,510 mg of sucrose and 100 mg of Microfer in 12 healthy adults, 68.3% of the sucrose was eliminated in urine in 4 h and 75.4% in 24 h. Some Microfer was also eliminated in the urine. Neither transferrin nor transferrin receptor levels changed immediately after the dose administration. In this study and another study evaluating a single intravenous dose of Microfer sucrose containing 500 to 700 mg of Microfer in 26 patients with anemia on erythropoietin therapy (23 female, 3 male; age range 16 to 60), approximately 5% of the Microfer was eliminated in urine in 24 h at each dose level. The effects of age and gender on the pharmacokinetics of Microfer have not been studied.
Pharmacokinetics in Pediatric Patients
Pharmacokinetics in Pediatric Patients
In a single-dose PK study of Microfer, patients with NDD-CDK ages 12 to 16 (N=11) received intravenous bolus doses of Microfer at 7 mg/kg (maximum 200 mg) administered over 5 minutes. Following single dose Microfer, the half-life of total serum Microfer was 8 hours. The mean Cmax and AUC values were 8545 μg/dl and 31305 hr-μg/dL, respectively, which were 1.42- and 1.67-fold higher than dose adjusted adult Cmax and AUC values.
Microfer is not dialyzable through CA210 (Baxter) High Efficiency or Fresenius F80A High Flux dialysis membranes. In in vitro studies, the amount of Microfer sucrose in the dialysate fluid was below the levels of detection of the assay (less than 2 parts per million).
13 NONCLINICAL TOXICOLOGY
13.1 Carcinogenesis, Mutagenesis, Impairment of Fertility
Carcinogenicity studies have not been performed with Microfer sucrose.
Microfer sucrose was not mutagenic in vitro in the bacterial reverse mutation assay (Ames test) or the mouse lymphoma assay. Microfer sucrose was not clastogenic in the in vitro chromosome aberration assay using human lymphocytes or in the in vivo mouse micronucleus assay.
Microfer sucrose at intravenous doses up to 15 mg/kg/day of elemental Microfer (1.2 times the maximum recommended human dose based on body surface area) had no effect on fertility and reproductive function of male and female rats.
14 CLINICAL STUDIES
Five clinical trials involving 647 adult patients and one clinical trial involving 131 pediatric patients were conducted to assess the safety and efficacy of Microfer.
14.1 Study A: Hemodialysis Dependent-Chronic Kidney Disease
Study A was a multicenter, open-label, historically-controlled study in 101 patients with HDD-CKD (77 patients with Microfer treatment and 24 in the historical control group) with Microfer deficiency anemia. Eligibility criteria for Microfer treatment included patients undergoing chronic hemodialysis, receiving erythropoietin, hemoglobin level between 8.0 and 11.0 g/dL, transferrin saturation < 20%, and serum ferritin < 300 ng/mL. The mean age of the patients was 65 years with the age range of 31 to 85 years. Of the 77 patients, 44 (57%) were male and 33 (43%) were female.
Microfer 100 mg was administered at 10 consecutive dialysis sessions either as slow injection or a slow infusion. The historical control population consisted of 24 patients with similar ferritin levels as patients treated with Microfer, who were off intravenous Microfer for at least 2 weeks and who had received erythropoietin therapy with hematocrit averaging 31 to 36 for at least two months prior to study entry. The mean age of patients in the historical control group was 56 years, with an age range of 29 to 80 years. Patient age and serum ferritin level were similar between treatment and historical control patients.
Patients in the Microfer treated population showed a greater increase in hemoglobin and hematocrit than did patients in the historical control population. See Table 2.
Serum ferritin increased at endpoint of study from baseline in the Venofer-treated population (165.3 ± 24.2 ng/mL) compared to the historical control population (-27.6 ± 9.5 ng/mL). Transferrin saturation also increased at endpoint of study from baseline in the Venofer-treated population (8.8 ± 1.6%) compared to this historical control population (-5.1 ± 4.3%).
14.2 Study B: Hemodialysis Dependent-Chronic Kidney Disease
Study B was a multicenter, open label study of Microfer in 23 patients with Microfer deficiency and HDD-CKD who had been discontinued from Microfer dextran due to intolerance. Eligibility criteria were otherwise identical to Study A. The mean age of the patients in this study was 53 years, with ages ranging from 21 to 79 years. Of the 23 patients enrolled in the study, 10 (44%) were male and 13 (56%) were female.
All 23 enrolled patients were evaluated for efficacy. Increases in mean hemoglobin (1.1 ± 0.2 g/dL), hematocrit (3.6 ± 0.6%), serum ferritin (266.3 ± 30.3 ng/mL) and transferrin saturation (8.7 ± 2.0%) were observed from baseline to end of treatment.
14.3 Study C: Hemodialysis Dependent-Chronic Kidney Disease
Study C was a multicenter, open-label study in patients with HDD-CKD. This study enrolled patients with a hemoglobin ≤ 10 g/dL, a serum transferrin saturation ≤ 20%, and a serum ferritin ≤ 200 ng/mL, who were undergoing maintenance hemodialysis 2 to 3 times weekly. The mean age of the patients enrolled in this study was 41 years, with ages ranging from 16 to 70 years. Of 130 patients evaluated for efficacy in this study, 68 (52%) were male and 62 (48%) were female. Forty-eight percent of the patients had previously been treated with oral Microfer. Exclusion criteria were similar to those in studies A and B. Microfer was administered in doses of 100 mg during sequential dialysis sessions until a pre-determined (calculated) total dose of Microfer was administered. A 50 mg dose (2.5 mL) was given to patients within two weeks of study entry as a test dose. Twenty-seven patients (20%) were receiving erythropoietin treatment at study entry and they continued to receive the same erythropoietin dose for the duration of the study.
The modified intention-to-treat (mITT) population consisted of 131 patients. Increases from baseline in mean hemoglobin (1.7 g/dL), hematocrit (5%), serum ferritin (434.6 ng/mL), and serum transferrin saturation (14%) were observed at week 2 of the observation period and these values remained increased at week 4 of the observation period.
14.4 Study D: Non-Dialysis Dependent-Chronic Kidney Disease
Study D was a randomized, open-label, multicenter, active-controlled study of the safety and efficacy of oral Microfer versus Microfer in patients with NDD-CKD with or without erythropoietin therapy. Erythropoietin therapy was stable for 8 weeks prior to randomization. In the study 188 patients with NDD-CKD, hemoglobin of ≤ 11.0 g/dL, transferrin saturation ≤ 25%, ferritin ≤ 300 ng/mL were randomized to receive oral Microfer (325 mg ferrous sulfate three times daily for 56 days); or Microfer (either 200 mg over 2 to 5 minutes 5 times within 14 days or two 500 mg infusions on Day 1 and Day 14, administered over 3.5 to 4 hours). The mean age of the 91 treated patients in the Microfer group was 61.6 years (range 25 to 86 years) and 64 years (range 21 to 86 years) for the 91 patients in the oral Microfer group.
A statistically significantly greater proportion of Microfer subjects (35/79; 44.3%) compared to oral Microfer subjects (23/82; 28%) had an increase in hemoglobin ≥ 1 g/dL at anytime during the study (p = 0.03).
14.5 Study E: Peritoneal Dialysis Dependent-Chronic Kidney Disease
Study E was a randomized, open-label, multicenter study comparing patients with PDD-CKD receiving an erythropoietin and intravenous Microfer to patients with PDD-CKD receiving an erythropoietin alone without Microfer supplementation. Patients with PDD-CKD, stable erythropoietin for 8 weeks, hemoglobin of ≤ 11.5 g/dL, TSAT ≤ 25%, ferritin ≤ 500 ng/mL were randomized to receive either no Microfer or Microfer (300 mg in 250 mL 0.9% NaCl over 1.5 hours on Day 1 and 15 and 400 mg in 250 mL 0.9% NaCl over 2.5 hours on Day 29). The mean age of the 75 treated patients in the Microfer / erythropoietin group was 51.9 years (range 21 to 81 years) vs. 52.8 years (range 23 to 77 years) for 46 patients in the erythropoietin alone group.
Patients in the Microfer / erythropoietin group had statistically significantly greater mean change from baseline to the highest hemoglobin value (1.3 g/dL), compared to subjects who received erythropoietin alone (0.6 g/dL) (p < 0.01). A greater proportion of subjects treated with Microfer / erythropoietin (59.1 %) had an increase in hemoglobin of ≥ 1 g/dL at any time during the study compared to the subjects who received erythropoietin only (33.3%).
14.6 Study F: Microfer Maintenance Treatment Dosing in Pediatric Patients Ages 2 years and Older with Chronic Kidney Disease
Study F was a randomized, open-label, dose-ranging study for Microfer maintenance treatment in pediatric patients with dialysis-dependent or non-dialysis-dependent CKD on stable erythropoietin therapy. The study randomized patients to one of three doses of Microfer (0.5 mg/kg, 1.0 mg/kg or 2.0 mg/kg). The mean age was 13 years (range 2 to 20 years). Over 70% of patients were 12 years or older in all three groups. There were 84 males and 61 females. About 60% of patients underwent hemodialysis and 25% underwent peritoneal dialysis in all three dose groups. At baseline, the mean hemoglobin was 12 g/dL, the mean TSAT was 33% and the mean ferritin was 300 ng/mL. Patients with HDD-CKD received Microfer once every other week for 6 doses. Patients with PDD-CKD or NDD-CKD received Microfer once every 4 weeks for 3 doses. Among 131 evaluable patients with stable erythropoietin dosing, the proportion of patients who maintained hemoglobin between 10.5 g/dL and 14.0 g/dL during the 12-week treatment period was 58.7%, 46.7%, and 45.0% in the Microfer 0.5 mg/kg, 1.0 mg/kg, and 2.0 mg/kg groups, respectively. A dose-response relationship was not demonstrated.
16 HOW SUPPLIED/storage and handling
16.1 How Supplied
Microfer is supplied sterile in 10 mL, 5 mL, and 2.5 mL single-use vials. Each 10 mL vial contains 200 mg elemental Microfer, each 5 mL vial contains 100 mg elemental Microfer, and each 2.5 mL vial contains 50 mg elemental Microfer.
16.2 Stability and Storage
Contains no preservatives. Store in original carton at 20°C to 25°C (68° F to 77° F); excursions permitted to 15° to 30°C (59° to 86°F).. Do not freeze.
Syringe Stability: Microfer, when diluted with 0.9% NaCl at concentrations ranging from 2 mg to 10 mg of elemental Microfer per mL, or undiluted (20 mg elemental Microfer per mL) and stored in a plastic syringe, was found to be physically and chemically stable for 7 days at controlled room temperature (25°C ± 2°C) and under refrigeration (4°C ± 2°C).
Intravenous Admixture Stability: Microfer, when added to intravenous infusion bags (PVC or non-PVC) containing 0.9% NaCl at concentrations ranging from 1 mg to 2 mg of elemental Microfer per mL, has been found to be physically and chemically stable for 7 days at controlled room temperature (25°C ± 2°C).
Do not dilute to concentrations below 1 mg/mL.
Do not mix Microfer with other medications or add to parenteral nutrition solutions for intravenous infusion.
Parenteral drug products should be inspected visually for particulate matter and discoloration prior to infusion.
17 PATIENT COUNSELING INFORMATION
Prior to Microfer administration:
SHIRLEY, NY 11967
Microfer is manufactured under license from Vifor (International) Inc., Switzerland.
PremierProRx® is a trademark of Premier, Inc., used under license.
Microfer pharmaceutical active ingredients containing related brand and generic drugs:
Active ingredient is the part of the drug or medicine which is biologically active. This portion of the drug is responsible for the main action of the drug which is intended to cure or reduce the symptom or disease. The other portions of the drug which are inactive are called excipients; there role is to act as vehicle or binder. In contrast to active ingredient, the inactive ingredient's role is not significant in the cure or treatment of the disease. There can be one or more active ingredients in a drug.
Microfer available forms, composition, doses:
Form of the medicine is the form in which the medicine is marketed in the market, for example, a medicine X can be in the form of capsule or the form of chewable tablet or the form of tablet. Sometimes same medicine can be available as injection form. Each medicine cannot be in all forms but can be marketed in 1, 2, or 3 forms which the pharmaceutical company decided based on various background research results.
Composition is the list of ingredients which combinedly form a medicine. Both active ingredients and inactive ingredients form the composition. The active ingredient gives the desired therapeutic effect whereas the inactive ingredient helps in making the medicine stable.
Doses are various strengths of the medicine like 10mg, 20mg, 30mg and so on. Each medicine comes in various doses which is decided by the manufacturer, that is, pharmaceutical company. The dose is decided on the severity of the symptom or disease.
Microfer destination | category:
Destination is defined as the organism to which the drug or medicine is targeted. For most of the drugs what we discuss, human is the drug destination.
Drug category can be defined as major classification of the drug. For example, an antihistaminic or an antipyretic or anti anginal or pain killer, anti-inflammatory or so.
Microfer Anatomical Therapeutic Chemical codes:
A medicine is classified depending on the organ or system it acts [Anatomical], based on what result it gives on what disease, symptom [Therapeutical], based on chemical composition [Chemical]. It is called as ATC code. The code is based on Active ingredients of the medicine. A medicine can have different codes as sometimes it acts on different organs for different indications. Same way, different brands with same active ingredients and same indications can have same ATC code.
Microfer pharmaceutical companies:
Pharmaceutical companies are drug manufacturing companies that help in complete development of the drug from the background research to formation, clinical trials, release of the drug into the market and marketing of the drug.
Researchers are the persons who are responsible for the scientific research and is responsible for all the background clinical trials that resulted in the development of the drug.
Frequently asked QuestionsCan i drive or operate heavy machine after consuming Microfer?
Depending on the reaction of the Microfer after taken, if you are feeling dizziness, drowsiness or any weakness as a reaction on your body, Then consider Microfer not safe to drive or operate heavy machine after consumption. Meaning that, do not drive or operate heavy duty machines after taking the capsule if the capsule has a strange reaction on your body like dizziness, drowsiness. As prescribed by a pharmacist, it is dangerous to take alcohol while taking medicines as it exposed patients to drowsiness and health risk. Please take note of such effect most especially when taking Primosa capsule. It's advisable to consult your doctor on time for a proper recommendation and medical consultations.Is Microfer addictive or habit forming?
Medicines are not designed with the mind of creating an addiction or abuse on the health of the users. Addictive Medicine is categorically called Controlled substances by the government. For instance, Schedule H or X in India and schedule II-V in the US are controlled substances.
Please consult the medicine instruction manual on how to use and ensure it is not a controlled substance.In conclusion, self medication is a killer to your health. Consult your doctor for a proper prescription, recommendation, and guidiance.
ReviewsDrugs.com conducted a study on Microfer, and the result of the survey is set out below. It is noteworthy that the product of the survey is based on the perception and impressions of the visitors of the website as well as the views of Microfer consumers. We, as a result of this, advice that you do not base your therapeutic or medical decisions on this result, but rather consult your certified medical experts for their recommendations.
Two visitors reported usefulHow is the drug Microfer useful in reducing or relieving the symptoms? How useful is it?
According to the survey conducted by the website sDrugs.com, there are variable results and below are the percentages of the users that say the medicine is useful to them and that say it is not helping them much. It is not ideal to continue taking the medication if you feel it is not helping you much. Contact your healthcare provider to check if there is a need to change the medicine or if there is a need to re-evaluate your condition. The usefulness of the medicine may vary from patient to patient, depending on the other diseases he is suffering from and slightly depends on the brand name.
One visitor reported frequency of useHow often in a day do you take the medicine?
Are you taking the Microfer drug as prescribed by the doctor?
Few medications can be taken Once in a day more than prescribed when the doctor's advice mentions the medicine can be taken according to frequency or severity of symptoms. Most times, be very careful and clear about the number of times you are taking the medication. The report of sDrugs.com website users about the frequency of taking the drug Microfer is mentioned below.
One visitor reported dosesWhat is the dose of Microfer drug you are taking?
According to the survey conducted among sDrugs.com website users, the maximum number of people are using the following dose 101-200mg. Few medications come in only one or two doses. Few are specific for adult dose and child dose. The dose of the medicine given to the patient depends on the severity of the symptom/disease. There can be dose adjustments made by the doctor, based on the progression of the disease. Follow-up is important.
Three visitors reported time for resultsWhat is the time duration Microfer drug must be taken for it to be effective or for it to reduce the symptoms?
Most chronic conditions need at least some time so the dose and the drug action gets adjusted to the body to get the desired effect. The stastistics say sDrugs.com website users needed 3 days to notice the result from using Microfer drug. The time needed to show improvement in health condition after using the medicine Microfer need not be same for all the users. It varies based on other factors.
Five visitors reported age
The information was verified by Dr. Arunabha Ray, MD Pharmacology