Enter drug's generic or brand name below. Results will appear here. Note: all drug related information obtained on this page is provided by RX List.
Using the RX LIST database:
(1) Enter the drug name in the search box below and hit ENTER
(2) The rx list web site will open here with the drug search completed. Next, scroll down the page to locate the link to the drug you are searching for and then click on the link.
What is Ferriprox and how is it used?
Ferriprox is a prescription medicine used to treat people with thalassemia syndromes who have iron overload from blood transfusions, when current iron removal (chelation) therapy does not work well enough.
It is not known if Ferriprox is safe and effective:
Who should not take Ferriprox?
Do not take Ferriprox if you are allergic to deferiprone or any of the ingredients in Ferriprox. See the end of this Medication Guide for a complete list of ingredients in Ferriprox.
Before you take Ferriprox, tell your healthcare provider if you:
FERRIPROX®
(deferiprone) oral solution, for oral use
WARNING
AGRANULOCYTOSIS/NEUTROPENIA
FERRIPROX (deferiprone) oral solution contains 100 mg/mL deferiprone (3-hydroxy-1,2-dimethylpyridin-4-one), a synthetic, orally active, iron-chelating agent. The molecular formula for deferiprone is C7H9NO2 and its molecular weight is 139.15 g/mol. Deferiprone has the following structural formula:
 |
Deferiprone is a white to pinkish-white powder. It is sparingly soluble in deionized water and has a melting point range of 272°C - 278°C.
FERRIPROX oral solution is a clear, reddish orange colored solution. Each mL of oral solution contains 100 mg deferiprone and the following inactive ingredients: purified water, hydroxyethylcellulose, glycerin, hydrochloric acid, artificial cherry flavor, peppermint oil, FD&C Yellow No. 6 and sucralose.
FERRIPROX is indicated for the treatment of patients with transfusional iron overload due to thalassemia syndromes when current chelation therapy is inadequate.
Approval is based on a reduction in serum ferritin levels. There are no controlled trials demonstrating a direct treatment benefit, such as improvement in disease-related symptoms, functioning, or increased survival [see Clinical Studies].
FERRIPROX is available in two different 1,000 mg tablet formulations, which have different oral dosing regimens to achieve the same total daily dosage.
To prevent medication errors, before prescribing and dispensing, ensure that the tablet formulation is appropriate for the dosing regimen. Each tablet has different identifying characteristics [see Dosage Forms And Strengths].
The recommended starting oral dosage of FERRIPROX (three times a day) is 75 mg/kg/day (actual body weight), in three divided doses per day. Table 1 describes the number of FERRIPROX tablets (three times a day) needed to achieve the 75 mg/kg/day total starting dosage). Round dose to the nearest 500 mg (half-tablet).
Table 1: FERRIPROX Tablets (three times a day) Needed to Achieve the Total Starting Daily Dosage of 75 mg/kg (rounded to the nearest half-tablet)
| Body Weight (kg) | Morning | Midday | Evening |
| 20 | 0.5 | 0.5 | 0.5 |
| 30 | 1 | 0.5 | 1 |
| 40 | 1 | 1 | 1 |
| 50 | 1.5 | 1 | 1.5 |
| 60 | 1.5 | 1.5 | 1.5 |
| 70 | 2 | 1.5 | 2 |
| 80 | 2 | 2 | 2 |
| 90 | 2.5 | 2 | 2.5 |
Tailor dosage adjustments for FERRIPROX (three times a day) to the individual patient’s response and therapeutic goals (maintenance or reduction of body iron burden). The maximum oral dosage is 99 mg/kg/day (actual body weight), orally, in three divided doses per day. Table 2 describes the number of FERRIPROX tablets (three times a day) needed to achieve the 99 mg/day total maximum daily dosage.
Table 2: Number of FERRIPROX Tablets (three times daily) Needed to Achieve the Maximum Total Daily Dosage of 99 mg/kg (rounded to the nearest half-tablet)
| Body Weight (kg) | Morning | Midday | Evening |
| 20 | 0.5 | 0.5 | 1 |
| 30 | 1 | 1 | 1 |
| 40 | 1.5 | 1 | 1.5 |
| 50 | 1.5 | 1.5 | 2 |
| 60 | 2 | 2 | 2 |
| 70 | 2.5 | 2 | 2.5 |
| 80 | 2.5 | 2.5 | 3 |
| 90 | 3 | 3 | 3 |
The recommended starting oral dosage of FERRIPROX (twice a day) is 75 mg/kg/day (actual body weight) in two divided doses per day (taken approximately 12 hours apart), with food. Round the total daily dose to the nearest 500 mg (half-tablet). Table 3 describes the number of FERRIPROX tablets (twice a day) needed to achieve the 75 mg/kg/day total starting daily dosage.
Table 3: Number of FERRIPROX Tablets (twice a day) Needed to Achieve the Total Starting Daily Dosage of 75 mg/kg (rounded to the nearest half-tablet)
| Body Weight (kg) | ||
| Morning | Evening | |
| 20 | 0.5 | 1 |
| 30 | 1 | 1.5 |
| 40 | 1.5 | 1.5 |
| 50 | 2 | 2 |
| 60 | 2 | 2.5 |
| 70 | 2.5 | 3 |
| 80 | 3 | 3 |
| 90 | 3.5 | 3.5 |
Tailor dosage adjustments of FERRIPROX (twice daily) to the individual patient’s response and therapeutic goals (maintenance or reduction of body iron burden). The maximum total daily oral dosage is 99 mg/kg (actual body weight) divided into two doses taken approximately 12 hours apart with food. Table 4 describes the number of FERRIPROX tablets (twice a day) needed to achieve the 99 mg/day total maximum daily dosage.
Table 4: Number of FERRIPROX Tablets (twice a day) Needed To Achieve a Total Maximium Recommended Daily Dosage of 99 mg/kg (rounded to the nearest half-tablet)
| Body Weight (kg) | Morning | Evening |
| 20 | 1 | 1 |
| 30 | 1.5 | 1.5 |
| 40 | 2 | 2 |
| 50 | 2.5 | 2.5 |
| 60 | 3 | 3 |
| 70 | 3.5 | 3.5 |
| 80 | 4 | 4 |
| 90 | 4.5 | 4.5 |
Monitor serum ferritin concentration every two to three months to assess the effect of FERRIPROX on body iron stores. If the serum ferritin is consistently below 500 mcg/L, consider temporarily interrupting FERRIPROX therapy until serum ferritin rises above 500 mcg/L.
Allow at least a 4-hour interval between administration of FERRIPROX and other drugs or supplements containing polyvalent cations such as iron, aluminum, or zinc [see DRUG INTERACTIONS, CLINICAL PHARMACOLOGY].
FERRIPROX® (deferiprone) tablets (three times a day) are white to off-white capsule-shaped tablets, film-coated, and have a functional score imprinted with “APO” score “1000” on one side and are plain on the other. They are provided in HDPE bottles.
1,000 mg film-coated tablets, 50 tablets NDC 10122-103-05
Store at 20°C to 25°C (68°F to 77°F); excursions permitted to 15°C to 30°C (59°F to 86°F) [see USP Controlled Room Temperature]. Keep the bottle tightly closed to protect from moisture.
FERRIPROX® (deferiprone) tablets (twice a day) are white to off-white capsule-shaped, beveled edge, biconvex coated tablets, and have a functional score engraved “FPX” bisect “DR” on one side, “APO” bisect “1000” on the other. They are supplied in child-resistant blister packs or HDPE bottles.
1,000 mg tablets, carton of 5 x 10-count blister packs NDC 10122-104-01
1,000 mg tablets, bottle of 50 tablets NDC 10122-104-05
1,000 mg tablets, bottle of 500 tablets NDC 10122-104-50
Store at 20°C to 25°C (68°F to 77°F); excursions permitted to 15°C to 30°C (59°F to 86°F) [see USP Controlled Room Temperature].
Manufactured by: Apotex Inc., Toronto, Ontario, Canada, M9L 1T9. Revised: May 2020
The following clinically significant adverse reactions are described below and elsewhere in the labeling:
Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in practice.
FERRIPROX tablets (twice a day) were evaluated in trials in healthy subjects. Currently, there are no clinical data in patients with FERRIPROX tablets (twice a day). FERRIPROX tablets (twice a day) contain deferiprone, the same active ingredient as FERRIPROX (deferiprone) tablets (three times a day) and oral solution. The following adverse reaction information represents the pooled data collected from 642 patients who participated in single arm or active-controlled clinical trials taking FERRIPROX (deferiprone) tablets (three times a day) and oral solution.
The most serious adverse reaction reported in clinical trials with FERRIPROX was agranulocytosis [see WARNINGS AND PRECAUTIONS].
The most common adverse reactions reported during clinical trials were nausea, vomiting, abdominal pain, alanine aminotransferase increased, arthralgia and neutropenia.
The table below lists the adverse drug reactions that occurred in at least 1% of patients treated with FERRIPROX in clinical trials.
Table 5:Adverse drug reactions occurring in ≥ 1% of FERRIPROX-treated patients
| Body System Adverse Reaction | (N=642) % Subjects |
| BLOOD AND LYMPHATIC SYSTEM DISORDERS | |
| Neutropenia | 6 |
| Agranulocytosis | 2 |
| GASTROINTESTINAL DISORDERS | |
| Nausea | 13 |
| Abdominal pain/discomfort | 10 |
| Vomiting | 10 |
| Diarrhea | 3 |
| Dyspepsia | 2 |
| INVESTIGATIONS | |
| Alanine Aminotransferase increased | 7 |
| Weight increased | 2 |
| Aspartate Aminotransferase increased | 1 |
| METABOLISM AND NUTRITION DISORDERS | |
| Increased appetite | 4 |
| Decreased appetite | 1 |
| MUSCULOSKELETAL AND CONNECTIVE TISSUE DISORDERS | |
| Arthralgia | 10 |
| Back pain | 2 |
| Pain in extremity | 2 |
| Arthropathy | 1 |
| NERVOUS SYSTEM DISORDERS | |
| Headache | 2 |
Gastrointestinal symptoms such as nausea, vomiting, and abdominal pain were the most frequent adverse reactions reported by patients participating in clinical trials and led to the discontinuation of FERRIPROX therapy in 1.6% of patients.
Chromaturia (reddish/brown discoloration of the urine) is a result of the excretion of iron in the urine.
The following additional adverse reactions have been reported in patients receiving FERRIPROX. Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or to establish a causal relationship to drug exposure.
Blood and lymphatic system disorders: thrombocytosis, pancytopenia.
Cardiac disorders: atrial fibrillation, cardiac failure.
Congenital, familial and genetic disorders: hypospadias.
Eye disorders: diplopia, papilledema, retinal toxicity.
Gastrointestinal disorders: enterocolitis, rectal hemorrhage, gastric ulcer, pancreatitis, parotid gland enlargement.
General disorders and administration site conditions: chills, pyrexia, edema peripheral, multi-organ failure.
Hepatobiliary disorders: jaundice, hepatomegaly.
Immune system disorders: anaphylactic shock, hypersensitivity.
Infections and infestations: cryptococcal cutaneous infection, enteroviral encephalitis, pharyngitis, pneumonia, sepsis, furuncle, infectious hepatitis, rash pustular, subcutaneous abscess.
Investigations: blood bilirubin increased, blood creatinine phosphokinase increased.
Metabolism and nutrition disorders: metabolic acidosis, dehydration.
Musculoskeletal and connective tissue disorders: myositis, chondropathy, trismus.
Nervous system disorders: cerebellar syndrome, cerebral hemorrhage, convulsion, gait disturbance, intracranial pressure increased, psychomotor skills impaired, pyramidal tract syndrome, somnolence.
Psychiatric disorders: bruxism, depression, obsessive-compulsive disorder.
Renal disorders: glycosuria, hemoglobinuria.
Respiratory, thoracic and mediastinal disorders: acute respiratory distress syndrome, epistaxis, hemoptysis, pulmonary embolism.
Skin, subcutaneous tissue disorders: hyperhidrosis, periorbital edema, photosensitivity reaction, pruritis, urticaria, rash, Henoch-Schönlein purpura.
Vascular disorders: hypotension, hypertension.
Avoid co-administration of FERRIPROX with other drugs known to be associated with neutropenia or agranulocytosis. If co-administration is unavoidable, closely monitor the absolute neutrophil count [see WARNINGS AND PRECAUTIONS].
Avoid use of UGT1A6 inhibitors (e.g., diclofenac, probenecid, or silymarin (milk thistle)) with FERRIPROX [see DOSAGE AND ADMINISTRATION, ADVERSE REACTIONS, CLINICAL PHARMACOLOGY].
Deferiprone has the potential to bind polyvalent cations (e.g., iron, aluminum, and zinc); allow at least a 4-hour interval between FERRIPROX and other medications (e.g., antacids), or supplements containing these polyvalent cations [see DOSAGE AND ADMINISTRATION].
Included as part of the "PRECAUTIONS" Section
Fatal agranulocytosis can occur with FERRIPROX use. FERRIPROX can also cause neutropenia, which may foreshadow agranulocytosis. Measure the absolute neutrophil count (ANC) before starting FERRIPROX therapy and monitor it weekly while on therapy.
Interrupt FERRIPROX therapy if neutropenia develops (ANC < 1.5 x 109/L).
Interrupt FERRIPROX if infection develops and monitor the ANC frequently.
Advise patients taking FERRIPROX to immediately interrupt therapy and report to their physician if they experience any symptoms indicative of infection.
In pooled clinical trials, the incidence of agranulocytosis was 1.7% of patients. The mechanism of FERRIPROX-associated agranulocytosis is unknown. Agranulocytosis and neutropenia usually resolve upon discontinuation of FERRIPROX, but there have been reports of agranulocytosis leading to death.
Implement a plan to monitor for and to manage agranulocytosis and neutropenia prior to initiating FERRIPROX treatment.
Consider hospitalization and other management as clinically appropriate.
Do not resume FERRIPROX in patients who have developed agranulocytosis unless potential benefits outweigh potential risks. Do not rechallenge patients who have developed neutropenia with FERRIPROX unless potential benefits outweigh potential risks.
Instruct the patient to immediately discontinue FERRIPROX and all other medications with a potential to cause neutropenia.
Obtain a complete blood cell (CBC) count, including a white blood cell (WBC) count corrected for the presence of nucleated red blood cells, an absolute neutrophil count (ANC), and a platelet count daily until recovery (ANC ≥ 1.5 x 109/L).
In clinical studies, 7.5% of 642 patients treated with FERRIPROX developed increased ALT values. Four (0.62%) FERRIPROX-treated subjects discontinued the drug due to increased serum ALT levels and 1 (0.16%) due to an increase in both ALT and AST.
Monitor serum ALT values monthly during therapy with FERRIPROX and consider interruption of therapy if there is a persistent increase in the serum transaminase levels.
Decreased plasma zinc concentrations have been observed on FERRIPROX therapy. Monitor plasma zinc, and supplement in the event of a deficiency.
Based on findings from animal reproduction studies and evidence of genotoxicity, FERRIPROX can cause fetal harm when administered to a pregnant woman. The available data on the use of FERRIPROX in pregnant women are insufficient to inform risk. In animal studies, administration of deferiprone during the period of organogenesis resulted in embryo-fetal death and malformations at doses lower than equivalent human clinical doses. Advise pregnant women and females of reproductive potential of the potential risk to the fetus [see Use In Specific Populations].
Advise females of reproductive potential to use an effective method of contraception during treatment with FERRIPROX and for at least six months after the last dose. Advise males with female partners of reproductive potential to use effective contraception during treatment with FERRIPROX and for at least three months after the last dose [see Use In Specific Populations].
Advise the patient to read the FDA-approved patient labeling (Medication Guide)
Store in the originally supplied bottle, closed tightly to protect from moisture.
Advise patients to take the first dose of FERRIPROX in the morning, the second dose at midday, and the third dose in the evening. Clinical experience suggests that taking FERRIPROX with meals may reduce nausea.
Advise patients to take the first dose of FERRIPROX tablets (twice a day) in the morning and the second in the evening.
Advise patients to take FERRIPROX tablets (twice a day) with food to reduce the risk of nausea and vomiting.
Advise patients to avoid alcohol while taking FERRIPROX tablets (twice a day). Consumption of alcohol while taking FERRIPROX tablets (twice a day) may result in more rapid release of deferiprone
Advise pregnant women and females of reproductive potential of the potential risk to a fetus. Advise females to inform their healthcare provider of a known or suspected pregnancy [see WARNINGS AND PRECAUTIONS and Use In Specific Populations]. Advise female patients of reproductive potential to use effective contraception during treatment with FERRIPROX and for at least six months after the last dose [see Use In Specific Populations]. Advise males with female partners of reproductive potential to use effective contraception during treatment with FERRIPROX and for at least three months after the last dose [see Use In Specific Populations and Nonclinical Toxicology].
Advise females not to breastfeed during treatment with FERRIPROX and for at least 2 weeks after the last dose [see Use In Specific Populations].
Carcinogenicity studies have not been conducted with deferiprone. However, in view of the genotoxicity results, and the findings of mammary gland hyperplasia and mammary gland tumors in rats treated with deferiprone in the 52-week toxicology study, tumor formation in carcinogenicity studies must be regarded as likely.
Deferiprone was positive in a mouse lymphoma cell assay in vitro. Deferiprone was clastogenic in an in vitro chromosomal aberration test in mice and in a chromosomal aberration test in Chinese Hamster Ovary cells. Deferiprone given orally or intraperitoneally was clastogenic in a bone marrow micronucleus assay in non-iron-loaded mice. A micronucleus test was also positive when mice predosed with iron dextran were treated with deferiprone. Deferiprone was not mutagenic in the Ames bacterial reverse mutation test.
A fertility and early embryonic development study of deferiprone was conducted in rats. Sperm counts, motility and morphology were unaffected by treatment with deferiprone. There were no effects observed on male or female fertility or reproductive function at the highest dose which was 25% of the MRHD.
In animal reproduction studies, oral administration of deferiprone to pregnant rats and rabbits during organogenesis at doses 33% and 49%, respectively, of the maximum recommended human dose (MRHD) resulted in structural abnormalities, embryo-fetal mortality and alterations to growth (see Data). The limited available data deferiprone use in pregnant women are insufficient to inform a drug-associated risk of major birth defects and miscarriage. Based on evidence and developmental toxicity in animal studies, FERRIPROX can cause fetal harm when administered to a pregnant woman. Advise pregnant women and females of reproductive potential of the potential risk to a fetus.
The estimated background risk of major birth defects and miscarriage for the indicated population is unknown. All pregnancies have a background risk of birth defect, loss, or other adverse outcomes. In the U.S. general population, the estimated background risk of major birth defects and of miscarriage is 2-4% and 15-20%, respectively.
Human Data
Post-marketing data available from 39 pregnancies of deferiprone-treated patients and 10 pregnancies of partners of deferipronetreated patients are as follows:
Of the 39 pregnancies in deferiprone-treated patients, 23 resulted in healthy newborns, 6 ended in spontaneous abortion, 9 had unknown outcomes, and 1 infant was born with anal atresia, nephroptosis, ventricular septal defect, hemivertebra and urethral fistula.
Of the 10 pregnancies in partners of deferiprone-treated patients, 5 resulted in healthy newborns, 1 resulted in a healthy newborn with slight hypospadias, 1 was electively terminated, 1 resulted in the intrauterine death of twins, and 2 had unknown outcomes.
Animal Data
During organogenesis, pregnant rats and rabbits received deferiprone at oral doses of 0, 30, 80 or 200 mg/kg/day, and 0, 10, 50, or 150 mg/kg/day, respectively. The daily dose was administered as two equal divided doses approximately 7 hours apart. Doses of 200 mg/kg/day in rats and 150 mg/kg/day in rabbits, approximately 33% and 49% of the MRHD, respectively, resulted in increased post-implantation loss and reduced fetal weights in the presence of maternal toxicity (reduced maternal body weight and body weight gain in both rats and rabbits; abnormal large placenta at low incidence in rats). The 200 mg/kg/day dose in rats resulted in external, visceral and skeletal fetal malformations such as cranial malformations, cleft palate, limb malrotation, anal atresia, internal hydrocephaly, anophthalmia and fused bones. The dose of 150 mg/kg/day in rabbits resulted in external fetal malformations (partially opened eyes) and minor blood vessel and skeletal variations.
In rats, malformations including micrognathia and persistent ductus arteriosus could be observed in the absence of maternal toxicity at doses equal to or greater than 30 and 80 mg/kg/day, approximately 5% and 13% of the MHRD, respectively.
There is no information regarding the presence of deferiprone in human milk, the effects on the breastfed child, or the effects on milk production.
Because of the potential for serious adverse reactions in the breastfed child, including the potential for tumorigenicity shown for deferiprone in animal studies, advise patients that breastfeeding is not recommended during FERRIPROX, and for at least 2 weeks after the last dose.
Pregnancy testing is recommended for females of reproductive potential prior to initiating FERRIPROX.
Females
FERRIPROX can cause embryo-fetal harm when administered to a pregnant woman [see Pregnancy]. Advise female patients of reproductive potential to use effective contraception during treatment with FERRIPROX and for at least 6 months after the last dose.
Males
Based on genotoxicity findings, advise males with female partners of reproductive potential to use effective contraception during treatment with FERRIPROX and for at least 3 months after the last dose [see Nonclinical Toxicology].
Safety and effectiveness in pediatric patients have not been established.
Clinical studies of deferiprone did not include sufficient numbers of subjects aged 65 and over to determine whether they respond differently from younger subjects. Other reported clinical experience has not identified differences in responses between the elderly and younger patients.
No cases of acute overdose have been reported. There is no specific antidote to FERRIPROX overdose.
Neurological disorders such as cerebellar symptoms, diplopia, lateral nystagmus, psychomotor slowdown, hand movements and axial hypotonia have been observed in children treated with 2.5 to 3 times the recommended dose for more than one year. The neurological disorders progressively regressed after deferiprone discontinuation.
FERRIPROX is contraindicated in patients with known hypersensitivity to deferiprone or to any of the excipients in the formulation. The following reactions have been reported in association with the administration of deferiprone: Henoch-Schönlein purpura; urticaria; and periorbital edema with skin rash [see ADVERSE REACTIONS].
Deferiprone is a chelating agent with an affinity for ferric ion (iron III). Deferiprone binds with ferric ions to form neutral 3:1 (deferiprone:iron) complexes that are stable at physiological pH.
No clinical studies were performed to assess the relationship between the dose of deferiprone and the amount of iron eliminated from the body.
At the maximum approved recommended dose, deferiprone does not prolong the QT interval to any clinically relevant extent.
The mean Cmax and AUC of deferiprone was 20 mcg/mL and 50 mcg·h/mL, respectively, in healthy subjects. The dose proportionality of deferiprone over the approved recommended dosage range is unknown.
Absorption
Deferiprone appeared in the blood within 5 to 10 minutes after oral administration. Peak serum concentration of deferiprone was reached approximately 1 to 2 hours after a single dose.
No clinically significant differences in the pharmacokinetics of deferiprone were observed following administration with food.
The elimination half-life of deferiprone is approximately 2 hours.
Metabolism
Deferiprone is metabolized primarily by UGT1A6. The major metabolite of deferiprone is the 3-O-glucuronide, which lacks iron binding capability.
Excretion
Following oral administration, 75% to 90% of the administered dose was recovered in urine (primarily as metabolite) in the first 24 hours.
In healthy subjects, the mean ± SD Cmax of deferiprone in serum was 6 ± 2 mcg/mL, and the mean ± SD AUC was 28 ± 7 mcg·h/mL following oral administration of a 1,000 mg dose of FERRIPROX tablets (twice a day) with food.
Absorption
Peak serum concentrations of deferiprone occur approximately 2 hours after a single dose of FERRIPROX tablets (twice a day) in fasted healthy subjects.
Following the administration of FERRIPROX tablets (twice a day) to healthy volunteers, the Cmax and the AUC of deferiprone remain unchanged after a high-fat meal (approximately 1,000 calories, 53% fat, 33% carbohydrates, and 14% protein) compared to fasted conditions.
At 40% (v/v) alcohol concentration in vitro dissolution studies, there was 88% release of deferiprone from a 1,000 mg FERRIPROX tablet (twice a day) within two hours compared to 4% release of deferiprone within 2 hours in the absence of alcohol.
Distribution
The apparent mean ± SD volume of distribution (V/F) of deferiprone was 97 ± 28 L following oral administration of a 1,000 mg dose of FERRIPROX tablets (twice a day) with food.
The mean ± SD elimination half-life of deferiprone is 1.8 ± 0.3 hours following the administration of FERRIPROX tablets (twice a day).
Metabolism
Deferiprone is metabolized primarily by UGT1A6. The major metabolite of deferiprone is the 3-O-glucuronide, which lacks iron-binding capability.
Excretion
Following oral administration, 75% to 90% of the administered dose was recovered in urine (primarily as metabolite) in the first 24 hours.
No clinically significant differences in the pharmacokinetics of deferiprone were observed based on sex, race/ethnicity, body weight, mild to severe (eGFR 15 to 89 mL/min/1.73 m2) renal impairment, or mild (Child Pugh Class A) to moderate (Child Pugh Class B) hepatic impairment. The effect of age, including geriatric or pediatric populations, end stage renal disease or severe (Child Pugh Class C) hepatic impairment on the pharmacokinetics of deferiprone is unknown.
UGTIA6 Inhibitors
Phenylbutazone (UGT1A6 inhibitor) decreased glucuronidation of deferiprone by up to 78%.
Polyvalent Cations
Deferiprone has the potential to bind polyvalent cations (e.g., iron, aluminum, and zinc).
FERRIPROX tablets (twice a day) were evaluated in trials in healthy subjects. Currently, there are no clinical data in patients treated with FERRIPROX tablets (twice a day). FERRIPROX tablets (twice a day) contains deferiprone, the same active ingredient as FERRIPROX (deferiprone) tablets and oral solution. The following information is based on studies with FERRIPROX (deferiprone) tablets (three times a day) and oral solution.
In a prospective, planned, pooled analysis of patients from several studies, the efficacy of deferiprone was assessed in transfusion-dependent iron overload patients in whom previous iron chelation therapy had failed or was considered inadequate due to poor tolerance. The main criterion for chelation failure was serum ferritin > 2,500 mcg/L before treatment with deferiprone. Deferiprone therapy (35-99 mg/kg/day) was considered successful in individual patients who experienced a ≥ 20% decline in serum ferritin within one year of starting therapy.
Data from a total of 236 patients were analyzed. Of the 224 patients with thalassemia who received deferiprone monotherapy and were eligible for serum ferritin analysis, 105 (47%) were male and 119 (53%) were female. The mean age of these patients was 18.2 years.
For the patients in the analysis, the endpoint of at least a 20% reduction in serum ferritin was met in 50% (of 236 subjects), with a 95% confidence interval of 43% to 57%.
A small number of patients with thalassemia and iron overload were assessed by measuring the change in the number of milliseconds (ms) in the cardiac MRI T2* value before and after treatment with deferiprone for one year. There was an increase in cardiac MRI T2* from a mean at baseline of 11.8 ± 4.9 ms to a mean of 15.1 ± 7.0 ms after approximately one year of treatment. The clinical significance of this observation is not known.
FERRIPROX®
(Feh’ ri prox)
(deferiprone) tablets
What is the most important information I should know about FERRIPROX?
FERRIPROX can cause serious side effects, including a very low white blood cell count. One type of white blood cell that is important for fighting infections is called a neutrophil. If your neutrophil count is low (neutropenia), you may be at risk of developing a serious infection that can lead to death.
Neutropenia is common with FERRIPROX and can become severe in some people. Severe neutropenia is known as agranulocytosis. If you develop agranulocytosis, you will be at risk of developing serious infections that can lead to death. Your healthcare provider should do a blood test before you start FERRIPROX and weekly during treatment to check your neutrophil count. If you develop neutropenia, your healthcare provider should check your blood counts every day until your white blood cell count improves. Your healthcare provider may temporarily stop treatment with FERRIPROX if you develop neutropenia or infection.
Stop taking FERRIPROX and get medical help right away if you develop any of these symptoms of infection:
See “What are the possible side effects of FERRIPROX?” for more information about side effects.
What is FERRIPROX?
FERRIPROX is a prescription medicine used to treat people with thalassemia syndromes who have iron overload from blood transfusions, when current iron removal (chelation) therapy does not work well enough.
It is not known if FERRIPROX is safe and effective:
Do not take FERRIPROX if you are allergic to deferiprone or any of the ingredients in FERRIPROX.
See the end of this Medication Guide for a complete list of ingredients in FERRIPROX.
Before you take FERRIPROX, tell your healthcare provider about all of your medical conditions, including if you:
Females who are able to become pregnant:
Males with female partners who are able to become pregnant:
Tell your healthcare provider about all the medicines you take, including prescription and over-the-counter medicines, vitamins and herbal supplements.
How should I take FERRIPROX?
What should be avoided during treatment with FERRIPROX?
What are the possible side effects of FERRIPROX?
FERRIPROX can cause serious side effects, including:
The most common side effects of FERRIPROX include:
FERRIPROX may cause a change in urine color to reddish-brown. This is not harmful and is expected during treatment with FERRIPROX.
These are not all of the possible side effects of FERRIPROX.
Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
How should I store FERRIPROX?
Keep FERRIPROX and all medicines out of the reach of children.
General information about the safe and effective use of FERRIPROX.
Medicines are sometimes prescribed for purposes other than those listed in a Medication Guide. Do not use FERRIPROX for a condition for which it was not prescribed. Do not give FERRIPROX to other people, even if they have the same symptoms that you have. It may harm them. You can ask your pharmacist or healthcare provider for information about FERRIPROX that is written for health professionals.
What are the ingredients in FERRIPROX?
Active ingredient: deferiprone
Inactive ingredients:
This Medication Guide has been approved by the U.S. Food and Drug Administration
