Journal List > J Korean Soc Hypertens > v.17(3) > 1089770

Kim, Jeong, Lee, Sim, Park, Yoon, Yoon, Kim, Hong, Kim, Ahn, Cho, Park, and Kang: The Phase 4 Randomized, Public, Parallel, Comparative, Clinical Trial to Compare Efficacy and Safety of S-(-)-Amlodipine Nicotinate with Ramipril in Hypertensive Patients

ABSTRACT

Background:

The aim of this study was to compare the antihypertensive effect of S-(-)-amlodipine nicotinate with ramipril in patients with essential hypertension.

Methods:

Total 138 patients (54.5 ± 10.5 years, 69 males) were enrolled in this study between 2008 and 2010. Amlodipine 2.5 mg or ramipril 2.5 mg was treated once in a day for 8 weeks. Epidemiologic analysis was performed in intend-to-treat group. Efficacy analysis was performed in the differences of diastolic blood pressure in study groups. Abnormal reactions were divided with severities and drug-relationship.

Results:

The change of diastolic blood pressures were more prominent with -12.7 ± 7.02 mm Hg in amlodipine group, and -9.6 ± 7.38 mm Hg in ramipril group (p = 0.023). The change of systolic blood pressures was higher in amlodipine group with -18.1 ± 7.91 mm Hg, and -14.3 ± 11.96 mm Hg in ramipril group (p = 0.047). Blood pressure normalization rates were 81.3% (48 of 59 patients) in amlodipine group, and 61.4% (35 of 57 patients) in ramipril group (p = 0.017). Abnormal reaction occurred in 5.8% (4 of 68 patients) of amlodipine group and 14.2% (10 of 70 patients) of ramipril group (p = 0.102). The most frequent abnormal reaction was respiratory symptom.

Conclusions:

S-Amlodipine-Nicotinate was more effective than ramipril in hypertensive patients without significant abnormal reaction.

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Fig. 1.
Schedule from Screening to week 8.
jksh-17-103f1.tif
Fig. 2.
Efficacy evaluation with diastolic blood pressure decrement comparing Week 0 with Week 8 in per-protocol and intent-to-treat group.
jksh-17-103f2.tif
Fig. 3.
Efficacy evaluation with systolic blood pressure decrement comparing Week 0 with Week 8 in per-protocol and intent-to-treat group.
jksh-17-103f3.tif
Table 1.
Grades of blood pressure reduction according to guidance for the clinical trials evaluation for hypertension
Descent Descending trend Constancy Elevation
Systolic blood pressure (mm Hg) ≤‐20 ‐19 – ‐10 ± 9 10 ≤
Diastolic blood pressure (mm Hg) ≤‐10 ‐9 – ‐5 ± 4 5 ≤
Mean blood pressure (mm Hg) ≤‐13 ‐12 – ‐7 ± 6 7 ≤
Table 2.
Baseline clinical characteristics in S-amlodipine and Ramipril groups
S-amlodipine Ramipril p-value
Sex (Male/Female) 35/33 (51.4/48.5) 34/36 (48.5/51.4) 0.733
Age (yr) 53.2 ± 11.07 55.7 ± 10.24 0.174
Smoking 0.601
Non-smoker 47 (69.1) 49 (70.0)
Ex-smoker 13 (19.1) 16 (22.8)
Current smoker 8 (11.7) 5 (7.1)
Alcohol history 32 (46.0) 29 (41.4)
Previous cardiovascular disease 39 (57.3) 47 (67.1) 0.235
Hypertension prevalence (yr) 3.2 ± 7.04 3.7 ± 4.87 0.614
Coronary heart disease 8 (11.7) 11 (15.7) 0.500
Other disease medication 14 (20.5) 20 (28.5) 0.276
Table 3.
Efficacy evaluation with blood pressure decrement
Per-protocol group Intent-to-treat group
95% CI S-amlodipine (n = 59, mm Hg) Ramipril (n = 57, mm Hg) p-value 95% CI S-amlodipine (n = 68, mm Hg) Ramipril (n= 70, mm Hg) p-value
Systolic blood pressure
Week 0 0.37 ± 2.21 144.1 ±5.09 144.7 ±7.07 0.620 0.28 ± 3.13 143.9 ± 5.12 145.4 ± 7.36 0.159
(-2.11-2.15) (-1.53-1.99)
Week 8 -2.19 ± 6.18 126.0 ±8.59 130.3 ±13.18 0.037 -1.81 ± 7.22 126.7 ± 9.01 132.5 ± 14.00 0.004
(-4.27-0.88) (-1.55-2.18)
Week 0-8 -3.11 ± 6.42 -18.1 ±7.91 -14.3 ±11.96 0.047 -3.68 ± 6.24 -17.1 ± 8.24 -12.9 ± 11.86 0.016
(1.44-7.73) (1.34-6.77)
Diastolic blood pressure
Week 0 0.43 ± 4.23 94.2 ±4.63 93.8 ±3.77 0.585 0.05 ± 4.27 94.0 ± 4.49 94.0 ± 4.05 0.950
(-1.13-1.99) (-1.39-1.48)
Week 8 -2.65 ± 7.79 81.4 ±7.55 84.1 ±8.03 0.069 -3.58 ± 8.08 81.8 ± 7.47 85.4 ± 8.62 0.010
(-5.52-0.22) (-6.30-0.86)
Week 0-8 -3.08 ± 7.20 -12.7 ±7.02 -9.6 ±7.38 0.023 -3.62 ± 7.24 -12.2 ± 7.12 -8.6 ± 7.36 0.003
(0.43-5.73) (1.18-6.06)
Table 4.
Efficacy evaluation in per-protocol group
S-amlodipine Ramipril p-value
Decrement rate 0.059
Descent 49 (83.0) 37 (64.9)
Descending trend 3 (5.0) 3 (5.2)
Constancy 7 (11.8) 17 (29.8)
Elevation 0 (0.0) 0 (0.0)
BP normalization rate (normal/abnormal) 48/11 (81.3/18.6) 35/22 (61.4/38.6) 0.017
Pulse pressure
Week 0 49.9 ±4.02 50.9 ±5.45 0.263
Week 8 44.5 ±6.21 46.1 ±9.71 0.266
Week 8 - 0 -5.3 ±6.80 -4.7 ±9.67 0.657
BP: blood pressure.
Table 5.
Classified distribution of abnormal reaction
Related occurence
S-amlodipine Ramipril
Asthenia 0 (0.0) 1 (14.2)
Dizziness 0 (0.0) 1 (14.2)
Tooth ache - -
Palpitation 0 (0.0) 1 (14.2)
Liver enzyme elevation 0 (0.0) 1 (14.2)
Generalized edema 1 (50.0) 0 (0.0)
Uterine disorder - -
Cough 1 (50.0) 3 (42.8)

Values are presented as number (%).

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