Nicardipine hydrochloride

1 INDICATIONS AND USAGE Nicardipine hydrochloride injection, USP is a calcium channel blocker indicated for the short-term treatment of hypertension in adults when oral therapy is not feasible. (1.1) 1.1 Hypertension Nicardipine hydrochloride injection, USP is indicated in adults for the short-term treatment of hypertension when oral therapy is not feasible or not desirable. For prolonged control of blood pressure, transfer patients to oral medication as soon as their clinical condition permits [see Dosage and Administration (2.1)] .

2 DOSAGE AND ADMINISTRATION For Intravenous Use. (2.1) Dilution is required. (2.3) When substituting for oral nicardipine therapy, use the intravenous infusion rate from the table below (2.1): Oral Nicardipine hydrochloride Dose Equivalent I.V. Infusion Rate (0.1 mg/mL) 20 mg q8h 0.5 mg/hr = 5 mL/hr 30 mg q8h 1.2 mg/hr = 12 mL/hr 40 mg q8h 2.2 mg/hr = 22 mL/hr In a patient not receiving oral nicardipine, initiate therapy at 5 mg/hr. Increase the infusion rate by 2.5 mg/hr every 5 minutes (for rapid titration) to 15 minutes (for gradual titration) up to a maximum of 15 mg/hr until desired blood pressure reduction is achieved. (2.1) Conversion Table (mg/hr) Equivalent I.V. Infusion Rate (0.1 mg/mL) 5 mg/hr 50 mL/hr 2.5 mg/hr 25 mL/hr 15 mg/hr 150 mL/hr If unacceptable hypotension or tachycardia occurs, discontinue the infusion. When blood pressure and heart rate stabilize, restart the infusion at low doses such as 3-5 mg/hr. (2.2) 2.1 Recommended Dosing Nicardipine hydrochloride injection, USP is intended for intravenous use. Vial must be diluted to 0.1 mg/ml before use [see Dosage and Administration (2.3)]. Titrate dose to achieve the desired blood pressure reduction. Individualize dosage depending on the blood pressure to be obtained and the response of the patient. Dosage as a Substitute for Oral Nicardipine Therapy The intravenous infusion rate required to produce an average plasma concentration equivalent to a given oral dose at steady state is shown in the following table: Oral Nicardipine hydrochloride Dose Equivalent I.V. Infusion Rate (0.1 mg/mL) 20 mg q8h 0.5 mg/hr = 5 mL/hr 30 mg q8h 1.2 mg/hr = 12 mL/hr 40 mg q8h 2.2 mg/hr = 22 mL/hr Dosage for Initiation of Therapy in a Patient Not Receiving Oral Nicardipine Initiate therapy at 50 mL/hr (5 mg/hr). If desired blood pressure reduction is not achieved at this dose, the infusion rate may be increased by 25 mL/hr (2.5 mg/hr) every 5 minutes (for rapid titration) to 15 minutes (for gradual titration) up to a maximum of 150 mL/hr (15 mg/hr), until desired blood pressure reduction is achieved. Following achievement of the blood pressure goal utilizing rapid titration, decrease the infusion rate to 30 mL/hr (3 mg/hr). Drug Discontinuation and Transition to an Oral Antihypertensive Agent Discontinuation of infusion is followed by a 50% offset of action in about 30 minutes. If treatment includes transfer to an oral antihypertensive agent other than oral nicardipine, initiate therapy upon discontinuation of nicardipine hydrochloride injection. If oral nicardipine is to be used, administer the first dose 1 hour prior to discontinuation of the infusion. Special Populations Titrate nicardipine hydrochloride injection slowly in patients with heart failure or impaired hepatic or renal function [see Warnings and Precautions (5.2, 5.3 and 5.4)] 2.2 Monitoring The time course of blood pressure decrease is dependent on the initial rate of infusion and the frequency of dosage adjustment. With constant infusion, blood pressure begins to fall within minutes. It reaches about 50% of its ultimate decrease in about 45 minutes. Monitor blood pressure and heart rate continually during infusion and avoid too rapid or excessive blood pressure drop during treatment. If there is concern of impending hypotension or tachycardia, the infusion should be discontinued. Then, when blood pressure has stabilized, infusion of nicardipine hydrochloride injection may be restarted at low doses such as 30-50 mL/hr (3-5 mg/hr) and adjusted to maintain desired blood pressure. 2.3 Instructions for Administration Administer nicardipine hydrochloride injection by a central line or through a large peripheral vein. Change the infusion site every 12 hours if administered via peripheral vein [see Warnings and Precautions (5.5)] . Preparation for Administration Vials must be diluted before infusion. Inspection As with all parenteral drugs, nicardipine hydrochloride injection. should be inspected visually for particulate m…

5 WARNINGS AND PRECAUTIONS Closely monitor response in patients with angina, heart failure, impaired hepatic function, or renal impairment. (5.1, 5.2, 5.3, 5.4) To reduce the possibility of venous thrombosis, phlebitis, and vascular impairment, do not use small veins, such as those on the dorsum of the hand or wrist. Exercise extreme care to avoid intra-arterial administration or extravasation. (5.5) To minimize the risk of peripheral venous irritation, change the site of infusion of nicardipine hydrochloride injection every 12 hours. (5.5) 5.1 Exacerbation of Angina Increases in frequency, duration, or severity of angina have been seen in chronic therapy with oral nicardipine. Induction or exacerbation of angina has been seen in less than 1% of coronary artery disease patients treated with nicardipine hydrochloride injection. The mechanism of this effect has not been established. 5.2 Exacerbation of Heart Failure Titrate slowly when using nicardipine hydrochloride injection, particularly in combination with a beta-blocker, in patients with heart failure or significant left ventricular dysfunction because of possible negative inotropic effects. 5.3 Increased effect with Impaired Hepatic Function Since nicardipine is metabolized in the liver, consider lower dosages and closely monitor responses in patients with impaired liver function or reduced hepatic blood flow. 5.4 Prolonged effect with Impaired Renal Function When nicardipine hydrochloride injection was given to mild to moderate hypertensive patients with moderate renal impairment, a significantly lower systemic clearance and higher area under the curve (AUC) was observed. These results are consistent with those seen after oral administration of nicardipine. Titrate gradually in patients with renal impairment. 5.5 Local Irritation To reduce the possibility of venous thrombosis, phlebitis, local irritation, swelling, extravasation, and the occurrence of vascular impairment, administer drug through large peripheral veins or central veins rather than arteries or small peripheral veins, such as those on the dorsum of the hand or wrist. To minimize the risk of peripheral venous irritation, change the site of the drug infusion every 12 hours.

4 CONTRAINDICATIONS Do not use in patients with advanced aortic stenosis (4.1). 4.1 Advanced Aortic Stenosis Nicardipine hydrochloride injection is contraindicated in patients with advanced aortic stenosis because part of the effect of nicardipine hydrochloride injection is secondary to reduced afterload. Reduction of diastolic pressure in these patients may worsen rather than improve myocardial oxygen balance.

7 DRUG INTERACTIONS Cimetidine increases oral nicardipine plasma levels. (7.2) Oral or intravenous nicardipine may increase cyclosporine and tacrolimus plasma levels. Frequent monitoring of trough blood levels of cyclosporine and tacrolimus is recommended when co-administering nicardipine hydrochloride injection (7.3, 7.4) 7.1 Beta-Blockers In most patients, nicardipine hydrochloride injection can safely be used concomitantly with beta-blockers. However, titrate slowly when using nicardipine hydrochloride injection in combination with a beta-blocker in heart failure patients [see Warnings and Precautions (5.2)] . 7.2 Cimetidine Cimetidine has been shown to increase nicardipine plasma concentrations with oral nicardipine administration. Frequently monitor response in patients receiving both drugs. Data with other histamine-2 antagonists are not available. 7.3 Cyclosporine Concomitant administration of oral or intravenous nicardipine and cyclosporine results in elevated plasma cyclosporine levels through nicardipine inhibition of hepatic microsomal enzymes, including CYP3A4. Closely monitor plasma concentrations of cyclosporine during nicardipine hydrochloride injection administration, and reduce the dose of cyclosporine accordingly. 7.4 Tacrolimus Concomitant administration of intravenous nicardipine and tacrolimus may result in elevated plasma tacrolimus levels through nicardipine inhibition of hepatic microsomal enzymes, including CYP3A4. Closely monitor plasma concentrations of tacrolimus during nicardipine hydrochloride injection administration, and adjust the dose of tacrolimus accordingly. 7.5 In Vitro Interaction The plasma protein binding of nicardipine was not altered when therapeutic concentrations of furosemide, propranolol, dipyridamole, warfarin, quinidine, or naproxen were added to human plasma in vitro.

6 ADVERSE REACTIONS Most common adverse reactions are headache (15%), hypotension (6%), tachycardia (4%) and nausea/vomiting (5%). (6.1) To report SUSPECTED ADVERSE REACTIONS, contact Lifestar Pharma LLC at 1-888-995-4337 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. The adverse reaction information from clinical trials does, however, provide a basis for identifying the adverse events that appear to be related to drug use and for approximating rates. Two hundred forty-four patients participated in two multicenter, double-blind, placebo-controlled trials of nicardipine hydrochloride injection. Adverse experiences were generally not serious and most were expected consequences of vasodilation. Adverse experiences occasionally required dosage adjustment. Therapy was discontinued in approximately 12% of patients, mainly due to hypotension, headache, and tachycardia. The table below shows percentage of patients with adverse events where the rate is >3% more common on nicardipine hydrochloride injection than placebo. Adverse Event Nicardipine hydrochloride (N=144) Placebo (N=100) Body as a Whole Headache, n (%) 21 (15) 2 (2) Cardiovascular Hypotension, n (%) 8 (6) 1 (1) Tachycardia, n (%) 5 (4) 0 Digestive Nausea/vomiting, n (%) 7 (5) 1 (1) Other adverse events have been reported in clinical trials or in the literature in association with the use of intravenously administered nicardipine: Body as a Whole: fever, neck pain Cardiovascular: angina pectoris, atrioventricular block, ST segment depression, inverted T wave, deep-vein thrombophlebitis Digestive: dyspepsia Hemic and Lymphatic: thrombocytopenia Metabolic and Nutritional: hypophosphatemia, peripheral edema Nervous: confusion, hypertonia Respiratory: respiratory disorder Special Senses: conjunctivitis, ear disorder, tinnitus Urogenital: urinary frequency Sinus node dysfunction and myocardial infarction, which may be due to disease progression, have been seen in patients on chronic therapy with orally administered nicardipine. 6.2 Postmarketing Experience Because adverse reactions are reported voluntarily from a population of uncertain size, it is not always possible to estimate reliably their frequency or to establish a causal relationship to drug exposure. The following adverse reaction has been identified during post-approval use of nicardipine hydrochloride injection: decreased oxygen saturation (possible pulmonary shunting).