What is the maximum rate for a nicardipine infusion in cc per hour?

Maximum Rate of Nicardipine Infusion

The maximum rate for nicardipine infusion is 15 mg/hr, which translates to 6 cc/hr when using the standard 2.5 mg/mL concentration (25 mg/10 mL vial after dilution). 1

Dosing Algorithm

Initial Dosing

• Start at 5 mg/hr for drug-free patients 1
• This equals 2 cc/hr when using the 2.5 mg/mL concentration

Titration Strategy

The rate of titration depends on clinical urgency 1:

• For gradual blood pressure reduction: Increase by 2.5 mg/hr every 15 minutes until desired BP reduction is achieved 1
• For rapid blood pressure reduction: Increase by 2.5 mg/hr every 5 minutes 1
• Maximum dose: 15 mg/hr (6 cc/hr with standard concentration) 1

Concentration-Specific Rates

When using premixed bags 1:

• 0.1 mg/mL concentration (20 mg/200 mL): Maximum rate = 150 cc/hr
• 0.2 mg/mL concentration (40 mg/200 mL): Maximum rate = 75 cc/hr

Clinical Context from Guidelines

The European Society of Cardiology recommends nicardipine at 5-15 mg/hr as continuous IV infusion, starting at 5 mg/hr, increasing every 15-30 minutes by 2.5 mg until goal BP is reached, then decreasing to 3 mg/hr for maintenance 2. This aligns with FDA labeling that specifies the 15 mg/hr maximum 1.

Maintenance Dosing

After achieving target BP 1:

• Reduce to 3-5 mg/hr for maintenance (1.2-2 cc/hr with standard concentration)
• This lower maintenance rate helps sustain BP control while minimizing adverse effects

Critical Safety Considerations

Hypotension Management

• If hypotension or tachycardia develops, discontinue the infusion immediately 1
• After stabilization, restart at low doses of 3-5 mg/hr 1

Infusion Site Management

• Change infusion site every 12 hours to minimize peripheral venous irritation and phlebitis risk 1
• Avoid small veins (dorsum of hand/wrist) and avoid intraarterial administration 1
• Phlebitis typically occurs after ≥14 hours at a single site 3

Common Pitfalls

• Most common adverse effects: Headache (13%), hypotension (5%), tachycardia (4%), nausea/vomiting (4%) 1
• Reflex tachycardia: Expect mean heart rate increase of ~5-10 bpm 2, 4
• Not a beta-blocker: Provides no protection against abrupt beta-blocker withdrawal 1

Special Populations

Hepatic Impairment

• Use with caution and close monitoring in patients with impaired hepatic function or portal hypertension 1
• Nicardipine is contraindicated in liver failure 2

Pregnancy

• While not the first-line agent in pregnancy, if used, the same maximum of 15 mg/hr applies 1
• Labetalol and hydralazine are preferred for hypertensive emergencies in pregnancy 5