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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Table 1.
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. |
Table 2.
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 |
Table 3.
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 |
Table 4.
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 |