Journal List > Transl Clin Pharmacol > v.22(1) > 1082588

Choi, Kim, Kim, Noh, Lee, Lee, Bae, and Kim: Pharmacokinetic Characteristics of Ibandronate and Tolerability of DP-R206 (150 mg Ibandronate/24,000 IU Vitamin D3) Compared to the Ibandronate (150 mg) Monotherapy in Healthy Adults

Abstract

Ibandronate (a bisphosphonate) is commonly used as an treatment of osteoporosis in combination with vitamin D. Monthly DP-R206-a novel, fixed-dose combination tablet (150 mg ibandro-nate/24,000 IU vitamin D3)-was recently developed to enhance patient compliance. This open, randomized, two-period crossover study was conducted to compare the pharmacokinetics of ibandronate when administered as DP-R206 or 150 mg ibandronate to healthy adult volunteers. Each volunteer was randomly allocated to receive single-dose DP-R206 or ibandronate with a 28-day washout period between treatments. Blood samples were assessed using pharmacokinetic analysis. Plasma ibandronate concentrations were determined using liquid chromatography-tandem mass spectrometry. Safety and tolerability assessments were performed throughout the study. In total, 103 participants received the study drugs and 72 participants completed the study. The geometric mean ratios (DP-R206/ibandronate) of the maximum concentration (Cmax) and the area under the plasma concentration time curve from time zero to the last concentration (AUClast) values were 0.959 (90% CI: 0.820–1.120) and 0.924 (90% CI: 0.805–1.060), respectively. The frequencies of adverse events (AEs) and drug reactions were similar between treatment groups, and all AEs were recovered without sequalae. Ibandronate pharmacokinetics, tolerability, and safety are comparable when administered to healthy individuals, regardless if administered as DP-R206 or ibandronate.

References

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Figure 1.
Allocation of the subjects to study groups
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Figure 2.
Mean plasma ibandronate concentration-time curves (semilog (upper) and linear (lower) scale)
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Table 1.
Demographic characteristics of the enrolled subjects
    RT (n=49) TR (n=54) Total (n=103) p
Age (yr)   24.71±2.75 24.70±3.49 24.71±3.15 0.694
Weight (kg)   70.24±8.73 71.71±8.03 71.01±8.37 0.579
Height (cm)   174.62±4.92 175.15±4.59 174.90±4.73 0.376
Drinking Yes 63.3% (31) 61.1% (33) 62.1% (64) 0.822§
No 36.7% (18) 38.9% (21) 37.9% (39)
Smoking Yes 38.8% (19) 33.3% (18) 35.9% (37) 0.565§
No 61.2% (30) 66.7% (36) 64.1% (66)
Caffeine Yes 61.2% (30) 55.6% (30) 58.3% (60) 0.560§
No 38.8% (19) 44.4% (24) 41.7% (43)
Subjects who administered the study drug at least once were included in this analysis.

Mann-Whitney U test,

T-test,

% (numbers of participants),

§ Chi-square test,

Shapiro-Wilk test for normality check were conducted. The p-value was <0.05 for age, while p-value>0.05 for weight and height parameters each.

Table 2.
Pharmacokinetic parameters
PK parameter Summary statistics Ibandronate (150 mg) DP-R206
Cmax (ng/mL) Arithmetic mean
SD
CV (%)
90.64
54.72
60.4
87.70
74.52
85.0
AUClast (ng/mL) Arithmetic mean
SD
CV (%)
530.66
340.96
65.9
482.80
325.34
67.4
AUCinf (ng·hr/mL) Arithmetic mean
SD
CV (%)
549.24
366.76
66.8
501.43
349.59
69.7
Tmax (hr) Median
Minimum
Maximum
2.00
0.50
6.00
2.00
0.50
6.00
t1/2 (hr) Mean
SD
CV (%)
32.38
15.29
47.21
30.76
16.52
53.71

DP-R206: fixed-dose 150 mg ibandronate/24,000 IU vitamin D3

Table 3.
Geometric mean ratio and 90% confidence interval limits of the primary ibandronate PK parameters (DP-R206∗:150 mg tablet ibandronate)
PK parameter Geometric mean ratio 90% Confidence interval
Cmax 0.959 0.820–1.120
AUClast 0.924 0.805–1.060
AUCinf 0.923 0.801–1.062

DP-R206: fixed-dose 150 mg ibandronate/24,000 IU vitamin D3

Table 4.
Adverse events
Treatment Ibandronate 150 mg (n=85) DP-R206 (n=90) Total
System organ class Severity Probably related Possibly related Unlikely related Definitely not related Probably related Possibly related Unlikely related Definitely not related  
Gastrointestinal disorders Mild 27 6 0 0 35 7 0 0 75
Moderate 2 1 0 0 6 2 0 0 11
Severe 1 0 0 0 3 0 0 0 4
General disorders and administration site conditions Mild 19 1 0 0 20 1 0 0 41
Moderate 7 0 0 0 6 0 0 0 13
Severe 0 0 0 0 1 0 0 0 1
Immune system disorders Mild 0 0 0 0 0 0 0 0 0
Moderate 0 0 0 0 0 0 0 0 0
Severe 0 1 0 0 0 0 0 0 1
Infections and infestations Mild 0 1 0 0 0 0 1 0 2
Moderate 0 0 0 0 0 0 0 0 0
Severe 0 0 0 0 0 0 0 0 0
Injury, poisoning, and procedural complications Mild 0 0 0 0 0 0 0 1 1
Moderate 0 0 0 0 0 0 0 0 0
Severe 0 0 0 0 0 0 0 0 0
Investigations Mild 0 1 2 0 0 0 0 0 3
Moderate 0 0 0 0 0 0 0 0 0
Severe 0 0 0 0 0 0 0 0 0
Metabolic and nutritional disorders Mild 0 0 0 0 0 1 0 0 1
Moderate 0 0 0 0 0 0 0 0 0
Severe 0 0 0 0 0 0 0 0 0
Musculoskeletal and connective tissue disorders Mild 25 0 0 0 26 1 0 0 52
Moderate 8 0 0 0 6 0 0 0 14
Severe 0 0 0 0 0 0 0 0 0
Nervous system disorders Mild 9 7 0 0 9 3 0 1 29
Moderate 0 0 0 0 0 1 0 0 1
Severe 0 0 0 0 0 0 0 0 0
Renal and urinary disorders Mild 0 2 0 0 0 0 0 0 2
Moderate 0 0 0 0 0 0 0 0 0
Severe 0 0 0 0 0 0 0 0 0
Respiratory, thoracic, and mediastinal disorders Mild 0 0 1 0 0 0 1 3 5
Moderate 0 0 0 0 0 0 0 0 0
Severe 0 0 0 0 0 0 0 0 0
Dermal and subcutaneous tissue disorders Mild 1 0 0 0 0 0 0 0 1
Moderate 0 0 0 0 0 0 0 0 0
Severe 0 1 0 0 0 0 0 0 1
Total   99 21 3 0 112 16 2 5 258

DP-R206: fixed-dose 150 mg ibandronate/24,000 IU vitamin D3

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