What dose of amlodipine is equivalent to a daily dose of 60 mg nifedipine?

Amlodipine Equivalent to Nifedipine 60mg Daily

Amlodipine 5mg once daily is approximately equivalent to nifedipine 60mg once daily for blood pressure control.

Dosing Equivalence

Based on the FDA-approved dosing ranges and clinical trial data, the conversion follows this pattern:

• Nifedipine extended-release 60mg daily ≈ Amlodipine 5mg daily 1, 2

This equivalence is supported by:

• FDA labeling shows nifedipine extended-release is dosed at 30-90mg daily 2
• Amlodipine is dosed at 2.5-10mg daily 1
• The typical therapeutic range suggests a roughly 12:1 ratio

Clinical Evidence Supporting Equivalence

Multiple head-to-head trials demonstrate comparable blood pressure lowering between these doses:

Direct comparison studies show that nifedipine GITS 60mg and amlodipine 5mg produce similar 24-hour ambulatory blood pressure reductions 3, 4. In a 2019 randomized controlled trial, after 8 weeks of treatment, both drugs achieved similar BP reductions (24-hour systolic/diastolic BP: amlodipine 10.3/6.5 vs nifedipine-GITS 10.9/6.3 mm Hg, P ≥ 0.24) 4.

A 1998 forced-titration study comparing felodipine ER, amlodipine, and nifedipine GITS found that amlodipine 5mg and nifedipine GITS 60mg produced comparable ambulatory BP reductions over 24 hours 5.

Important Clinical Distinctions

While the BP-lowering efficacy is similar, there are key pharmacological differences:

Amlodipine advantages:

• Longer half-life provides more consistent coverage - significantly better BP control when doses are missed 4, 6
• Less pharmacokinetic variability (33% vs 59% intra-subject variability) 3
• Reserve pharmacological activity up to 48 hours post-dose 3
• Lower discontinuation rates due to side effects 7

Nifedipine GITS characteristics:

• More rapid onset of action (5-10 minutes vs 1-2 hours for amlodipine) 8
• May cause more transient sympathetic activation 9

Practical Conversion Approach

When converting from nifedipine 60mg daily to amlodipine:

1. Start with amlodipine 5mg once daily - this is the standard equivalent dose
2. Monitor BP after 7-14 days - adjust if needed 1
3. Maximum amlodipine dose is 10mg daily if additional BP lowering is required 1
4. For elderly, fragile, or hepatically impaired patients, consider starting at amlodipine 2.5mg daily 1

Common Pitfalls

• Do not assume a linear dose conversion - the relationship is not 1:1 or even proportional across all dose ranges
• Amlodipine's longer half-life means steady-state takes longer to achieve (7-8 days), so avoid premature dose escalation
• Both drugs cause dose-related pedal edema, more common in women 10