MILRINONE LACTATE

Milrinone Lactate is a member of a class of bipyridine inotropic/vasodilator agents with phosphodiesterase inhibitor activity, distinct from digitalis glycosides or catecholamines. Milrinone lactate is designated chemically as 1,6-dihydro-2-methyl-6-oxo-[3,4´-bipyridine]-5-carbonitrile lactate and has the following structure: CH 3 CHOHCOOH Milrinone is an off-white to tan crystalline compound with a molecular weight of 211.2 and a molecular formula of C 12 H 9 N 3 O. It is slightly soluble in methanol, and very slightly soluble in chloroform and in water. As the lactate salt, it is stable and colorless to pale yellow in solution. Milrinone Lactate is available as sterile aqueous solutions of the lactate salt of milrinone for injection or infusion intravenously. Sterile, single dose vials: Single dose vials of 10, 20 and 50 mL contain in each mL milrinone lactate equivalent to 1 mg milrinone and 47 mg Dextrose, Anhydrous, USP, in Water for Injection, USP. The pH is adjusted to between 3.2 and 4.0 with lactic acid or sodium hydroxide. The total concentration of lactic acid can vary between 0.95 mg/mL and 1.29 mg/mL. These vials require preparation of dilutions prior to administration to patients intravenously. Pre-Mix Flexible Containers : The Flexible Containers provide two ready-to-use dilutions of milrinone in volumes of 100 mL and 200 mL of 5% Dextrose Injection. Each mL contains milrinone lactate equivalent to 200 mcg (0.2 mg) milrinone. The nominal concentration of lactic acid is 0.282 mg/mL. Each mL also contains 49.4 mg Dextrose Anhydrous, USP. The pH is adjusted to between 3.2 and 4.0 with lactic acid or sodium hydroxide. The flexible plastic container is comprised of polypropylene with a foil overwrap. Water can permeate the plastic into the overwrap, but the amount is insufficient to significantly affect the pre-mix solution. chemical structure

Milrinone Lactate Injection, USP and Milrinone Lactate in 5% Dextrose Injection are indicated for the short-term intravenous treatment of patients with acute decompensated heart failure. Patients receiving milrinone should be observed closely with appropriate electrocardiographic equipment. The facility for immediate treatment of potential cardiac events, which may include life threatening ventricular arrhythmias, must be available. The majority of experience with intravenous milrinone has been in patients receiving digoxin and diuretics. There is no experience in controlled trials with infusions of milrinone for periods exceeding 48 hours.

Milrinone Lactate in 5% Dextrose Injection should not be used for administering a loading dose. The information regarding loading doses for milrinone is for 1 mg/mL vial only. A loading dose of Milrinone Lactate Injection (1 mg [base]/mL) should be administered followed by a continuous infusion (maintenance dose) according to the following guidelines: LOADING DOSE — 50 mcg/kg: Administer slowly over 10 minutes The table below shows the loading dose in milliliters (mL) of milrinone (1 mg/mL) by patient body weight (kg). Loading Dose (mL) Using 1 mg/mL Concentration Patient Body Weight (kg) kg 30 40 50 60 70 80 90 100 110 120 mL 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 The loading dose may be given undiluted, but diluting to a rounded total volume of 10 or 20 mL (see Maintenance Dose for diluents) may simplify the visualization of the injection rate. MAINTENANCE DOSE Infusion Rate Total Daily Dose (24 hours) Minimum 0.375 mcg/kg/min 0.59 mg/kg Administer as a continuous intravenous infusion Standard 0.50 mcg/kg/min 0.77 mg/kg Maximum 0.75 mcg/kg/min 1.13 mg/kg Milrinone drawn from vials should be diluted prior to maintenance dose administration. The diluents that may be used are 0.45% Sodium Chloride Injection, USP; 0.9% Sodium Chloride Injection, USP; or 5% Dextrose Injection, USP. The table below shows the volume of diluent in milliliters (mL) that must be used to achieve 200 mcg/mL concentration for infusion, and the resultant total volumes. Desired Infusion Concentration mcg/mL Milrinone 1 mg/mL (mL) Diluent (mL) Total Volume (mL) 200 10 40 50 200 20 80 100 The infusion rate should be adjusted according to hemodynamic and clinical response. Patients should be closely monitored. In controlled clinical studies, most patients showed an improvement in hemodynamic status as evidenced by increases in cardiac output and reductions in pulmonary capillary wedge pressure. Note : See " Dosage Adjustment in Renally Impaired Patients ." Dosage may be titrated to the maximum hemodynamic effect and should not exceed 1.13 mg/kg/day. Duration of therapy should depend upon patient responsiveness. The maintenance dose in mL/hr by patient body weight (kg) may be determined by reference to the following table. Note : Milrinone Lactate in 5% Dextrose Injection supplied in 100 mL and 200 mL Flexible Containers (200 mcg/mL in 5% Dextrose Injection) need not be diluted prior to use. Milrinone Infusion Rate(mL/hr) Using 200 mcg/mL Concentration Maintenance Dose (mcg/kg/min) Patient Body Weight (kg) 30 40 50 60 70 80 90 100 110 120 0.375 3.4 4.5 5.6 6.8 7.9 9 10.1 11.3 12.4 13.5 0.4 3.6 4.8 6 7.2 8.4 9.6 10.8 12 13.2 14.4 0.5 4.5 6 7.5 9 10.5 12 13.5 15 16.5 18 0.6 5.4 7.2 9 10.8 12.6 14.4 16.2 18 19.8 21.6 0.7 6.3 8.4 10.5 12.6 14.7 16.8 18.9 21 23.1 25.2 0.75 6.8 9 11.3 13.5 15.8 18 20.3 22.5 24.8 27 When administering milrinone lactate by continuous infusion, it is advisable to use a calibrated electronic infusion device. The Flexible Container has a concentration of milrinone equivalent to 200 mcg/mL in 5% Dextrose Injection and is more convenient to use than dilutions prepared from the vials. To use the Flexible Container, tear the overwrap at the notch and remove the Pre-Mix solution container. Squeeze the container firmly to check for leaks. Discard the container if leaks are found since the sterility of the product could be affected. Do not add supplementary medication. To prepare the container for administration of milrinone intravenously, use aseptic techniques. 1. The flow control clamp of the administration set is closed. 2. The cover of the outlet port at the bottom of the container is removed. 3. Noting the full directions on the administration set carton, the piercing pin of the set is inserted into the port with a twisting motion until it is firmly sealed. 4. The container is suspended on the hanger. 5. The drop chamber is squeezed and released to establish the fill level. 6. The flow control clamp is opened to expel air from the set and then closed. 7. The set is attached to the venipuncture device, primed, and if not indwelling, the venipuncture is performed. 8. The rate of administration is controlled with the flow control clamp. WARNING - DO NOT USE IN SERIES CONNECTIONS . Caution: Do not use plastic containers in series connections. Such use could result in air embolism due to residual air being drawn from the primary container before administration of the fluid from the secondary container is complete. Intravenous drug products should be inspected visually and should not be used if particulate matter or discoloration is present. Dosage Adjustment in Renally Impaired Patients Data obtained from patients with severe renal impairment (creatinine clearance = 0 to 30 mL/min) but without congestive heart failure have demonstrated that the presence of renal impairment significantly increases the terminal elimination half-life of milrinone. Reductions in infusion rate may be necessary in patients with renal impairment. For patients with clinical evidence of renal impairment, the recommended infusion rate can be obtained from the following table: Creatinine Clearance (mL/min/1.73 m 2 ) Infusion Rate (mcg/kg/min) 5 0.20 10 0.23 20 0.28 30 0.33 40 0.38 50 0.43

Milrinone Lactate Injection, USP and Milrinone Lactate in 5% Dextrose Injection are contraindicated in patients who are hypersensitive to it.

Cardiovascular Effects In patients receiving milrinone in Phase II and III clinical trials, ventricular arrhythmias were reported in 12.1%: Ventricular ectopic activity, 8.5%; nonsustained ventricular tachycardia, 2.8%; sustained ventricular tachycardia, 1% and ventricular fibrillation, 0.2% (2 patients experienced more than one type of arrhythmia). Holter recordings demonstrated that in some patients injection of milrinone increased ventricular ectopy, including nonsustained ventricular tachycardia. Life-threatening arrhythmias were infrequent and when present have been associated with certain underlying factors such as preexisting arrhythmias, metabolic abnormalities (e.g., hypokalemia), abnormal digoxin levels and catheter insertion. Milrinone was not shown to be arrhythmogenic in an electrophysiology study. Supraventricular arrhythmias were reported in 3.8% of the patients receiving milrinone. The incidence of both supraventricular and ventricular arrhythmias has not been related to the dose or plasma milrinone concentration. Other cardiovascular adverse reactions include hypotension, 2.9% and angina/chest pain, 1.2%. In the post-marketing experience, there have been rare cases of “torsades de pointes” reported. CNS Effects Headaches, usually mild to moderate in severity, have been reported in 2.9% of patients receiving milrinone. Other Effects Other adverse reactions reported, but not definitely related to the administration of milrinone include hypokalemia, 0.6%; tremor, 0.4%; and thrombocytopenia, 0.4%. Isolated spontaneous reports of bronchospasm and anaphylactic shock have been received; and in the post-marketing experience, liver function test abnormalities and skin reactions such as rash have been reported. Post-Marketing Adverse Event Reports In addition to adverse events reported from clinical trials, the following events have been reported from worldwide post-marketing experience with milrinone: Isolated spontaneous reports of bronchospasm and anaphylactic shock. Liver function test abnormalities and skin reactions such as rash. Administration site conditions: Infusion site reaction. To report SUSPECTED ADVERSE REACTIONS, contact Hikma Pharmaceuticals USA Inc. at 1-877-845-0689 or the FDA at 1-800-FDA-1088 or www.fda.gov/medwatch.

No untoward clinical manifestations have been observed in limited experience with patients in whom milrinone was used concurrently with the following drugs: digitalis glycosides; lidocaine, quinidine; hydralazine, prazosin; isosorbide dinitrate, nitroglycerin; chlorthalidone, furosemide, hydrochlorothiazide, spironolactone; captopril; heparin, warfarin, diazepam, insulin; and potassium supplements.

Store at 20° to 25°C (68° to 77°F) [See USP Controlled Room Temperature]. Avoid freezing. Exposure of pharmaceutical products to heat should be minimized. Avoid excessive heat. Brief exposure of Flexible Containers up to 40ºC (104ºF) does not adversely affect the product. Manufactured by: HIKMA FARMACÊUTICA (PORTUGAL), S.A. Estrada do Rio da Mó, 8, 8A e 8B – Fervença – 2705-906 Terrugem SNT, PORTUGAL Distributed by: Hikma Pharmaceuticals USA Inc. Berkeley Heights, NJ 07922 Revised: 9/2024 PIN238-WES/4