korsuva
difelikefalin acetate · by vifor intl
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Overview
11 DESCRIPTION KORSUVA (difelikefalin) is a kappa opioid receptor agonist. Difelikefalin is a synthetic peptide with a single stereoisomer and is present as an acetate salt. Difelikefalin acetate is a white to off-white powder with a molecular formula of C 36 H 53 N 7 O 6 ∙xAcOH (1.0≤ × ≤2.0) and a molecular weight of 679.4 g/mol (mono- isotopic; free base). It is soluble in water. The chemical name of difelikefalin acetate is 4-amino-1-(D-phenylalanyl-D-phenylalanyl-D-leucyl-D-lysyl)piperidine-4-carboxylic acid, acetate salt. The chemical structure is: KORSUVA (difelikefalin) injection is supplied in a single-dose vial containing 65 mcg/1.3 mL (50 mcg/mL) of difelikefalin as a sterile, preservative-free, clear and colorless solution for intravenous injection. KORSUVA is formulated as an isotonic 40 mM acetate buffer solution with an osmolality of 250 to 350 mOsm and a pH of 4.5. Each milliliter of KORSUVA injection contains 50 mcg of difelikefalin (equivalent to an average of 58.3 mcg of difelikefalin acetate), 1.3 mg of acetic acid, 2.5 mg of sodium acetate trihydrate, 7.2 mg of sodium chloride (to adjust tonicity), and water for injection. Chemical Structure
How to use
Recommended dosage is 0.5 mcg/kg. ( 2.1 ) Administer by intravenous bolus injection into the venous line of the dialysis circuit at the end of each HD treatment. ( 2.1 ) Do not mix or dilute KORSUVA prior to administration. ( 2.2 ) Administer within 4 hours of syringe preparation. ( 2.3 ) See full prescribing information for additional recommendations on preparation and administration of KORSUVA. ( 2.2 , 2.3 ) 2.1 Dosage The recommended dosage of KORSUVA is 0.5 mcg/kg administered by intravenous bolus injection into the venous line of the dialysis circuit at the end of each HD treatment [see Dosage and Administration (2.3) ] . If a regularly scheduled HD treatment is missed, resume KORSUVA at the end of the next HD treatment. 2.2 Preparation Instructions Do not mix or dilute KORSUVA prior to administration. Inspect KORSUVA for particulate matter and discoloration prior to administration. The solution should be clear and colorless. Do not use KORSUVA vials if particulate matter or discoloration is observed. KORSUVA is supplied in a single-dose vial. Discard any unused product. Injection volume to be administered is determined by patient's target dry body weight in kilograms (one patient may use less than the full contents of the vial or use more than one vial). See Table 1 . Table 1. KORSUVA Injection Volumes Based on Target Dry Body Weight Target Dry Body Weight Range (kg)…
Side effects
The following clinically significant adverse reactions are described elsewhere in the labeling: Dizziness, Somnolence, Mental Status Changes, and Gait Disturbances [see Warnings and Precautions (5.1) ] The most common adverse reactions (incidence ≥2% and ≥1% higher than placebo) were diarrhea, dizziness, nausea, gait disturbances, including falls, hyperkalemia, headache, somnolence, and mental status change. ( 6 ) To report SUSPECTED ADVERSE REACTIONS, contact Vifor (International) Inc. at 1-844-835-8277 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch . 6.1 Clinical Trials Experience 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. A total of 1306 subjects undergoing HD who had moderate-to-severe pruritus were treated with KORSUVA in placebo-controlled and uncontrolled Phase 3 clinical trials. Of these, 711 were treated for at least 6 months and 400 were treated for at least one year. Two placebo-controlled Phase 3 trials (Trial 1 and Trial 2), in subjects undergoing HD who had moderate-to-severe pruritus were pooled to evaluate the safety of KORSUVA in comparison to placebo up to 12 weeks. In total, 848 subjects were evaluated (424 in KORSUVA group and 424 in…
Warnings
Important safety information
Dizziness, Somnolence, Mental Status Changes, and Gait Disturbances: Dizziness, somnolence, mental status changes, and gait disturbances, including falls, have occurred. Centrally-acting depressant medications, sedating antihistamines, and opioid analgesics should be used with caution during treatment with KORSUVA. ( 5.1 ) Risk of Driving and Operating Machinery: May impair mental or physical abilities. Advise patients not to drive or operate dangerous machinery until the effect of KORSUVA on a patient's ability to drive or operate machinery is known. ( 5.2 ) 5.1 Dizziness, Somnolence, Mental Status Changes, and Gait Disturbances Dizziness, somnolence, mental status changes, and gait disturbances, including falls, have occurred in patients taking KORSUVA and may subside over time with continued treatment [see Adverse Reactions (6.1) ] . In Trial 1 and Trial 2, 17.0% of patients randomized to receive KORSUVA reported at least one of these adverse reactions, compared to 12.0% of patients who received placebo. The incidence of somnolence was higher in KORSUVA-treated subjects 65 years of age and older (7.0%) than in KORSUVA-treated subjects less than 65 years of age (2.8%). Concomitant use of centrally-acting depressant medications, sedating antihistamines and opioid analgesics may increase the likelihood of these adverse reactions and should be used with caution during treatment…
May treat
Dosage forms
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Frequently asked questions
- What is Korsuva?
- 11 DESCRIPTION KORSUVA (difelikefalin) is a kappa opioid receptor agonist. Difelikefalin is a synthetic peptide with a single stereoisomer and is present as an acetate salt. Difelikefalin acetate is a white to off-white powder with a molecular formula of C 36 H 53 N 7 O 6 ∙xAcOH (1.0≤ × ≤2.0) and a molecular weight of 679.4 g/mol (mono- isotopic; free base). It is soluble in water. The chemical name of difelikefalin acetate is 4-amino-1-(D-phenylalanyl-D-phenylalanyl-D-leucyl-D-lysyl)piperidine-4-carboxylic acid, acetate salt. The chemical structure is: KORSUVA (difelikefalin) injection is supplied in a single-dose vial containing 65 mcg/1.3 mL (50 mcg/mL) of difelikefalin as a sterile, preservative-free, clear and colorless solution for intravenous injection. KORSUVA is formulated as an isotonic 40 mM acetate buffer solution with an osmolality of 250 to 350 mOsm and a pH of 4.5. Each milliliter of KORSUVA injection contains 50 mcg of difelikefalin (equivalent to an average of 58.3 mcg of difelikefalin acetate), 1.3 mg of acetic acid, 2.5 mg of sodium acetate trihydrate, 7.2 mg of sodium chloride (to adjust tonicity), and water for injection. Chemical Structure
- What does Korsuva treat?
- Korsuva (Difelikefalin Acetate) is indicated for pruritus, per its drug-label indications. This is general reference, not medical advice.
Clinical content sourced from the FDA label via openFDA (U.S. FDA). Provided for general reference only — not medical advice. Always consult a licensed professional and the current prescribing information.
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