This study was performed to evaluate the bioequivalency between the Osmetone$^{TM}$ Tablet (Myeongmoon Pharm. Co., Ltd.) as a test formulation and the Relafen$^{TM}$ Tablet (Handok Pharm. Co., Ltd.) as a reference formulation. Twenty-four healthy male volunteers were administered the formulations by the randomized Latin square crossover design, and the plasma samples were determined by a high performance liquid chromatography (HPLC) with Ultra-Violet (UV) detector. AUC$_t$, C$_{max}$ and T$_{max}$ were obtained from the time-plasma concentration curves, and log-transformed AUC$_t$ and C$_{max}$ and log-untransformed T$_{max}$ values for two formulations were compared by statistical tests and analysis of variation. AUC$_t$ was determined to be 897.8${\pm}$431.1 ug.hr/ml for the reference formulation and 902.3${\pm}$408.4 ug.hr/ml for the test formulation. The mean values of C$_{max}$ for the reference and test formulations were 24.2${\pm}$8.9 and 24.0${\pm}$9.5 ug/ml, respectively. The AUC$_t$ and C$_{max}$ ratios of the reference Relafen$^{TM}$ Tablet to the test Osmetone$^{TM}$ Tablet were +5.01% and -0.83%, respectively, showing that the mean differences were satisfied the acceptance criteria within 20%. The results from analysis of variance for logtransformed AUC$_t$ and C$_{max}$ indicated that sequence effects between groups were not exerted and 90% confidence limits of the mean differences for AUC$_t$ and C$_{max}$ were located in ranges from log 0.80 to log 1.25, satisfying the acceptance criteria of the KFDA bioequivalence. The Osmetone$^{TM}$ Tablet as the test formulation was considered to be bioequivalant to the Relafen$^{TM}$ Tablet used as its reference formulation, based on AUC$_t$ and C$_{max}$ values.
The objective of the study was to evaluate the bioequivalency between the $Rozid^{TM}$ Tablet (Ilhwa Pharm. Co., Ltd.) as a test formulation and the $Rulid^{TM}$ Tablet (Handok Pharm. Co., Ltd) as a reference formulation. Twenty-four healthy male volunteers were administered the formulations by the randomized Latin square crossover design, and the plasma samples were determined by a high performance liquid chromatography (HPLC) with fluorescence detector. $AUC_t,\;C_{max}\;and\;T_{max}$ were obtained from the time-plasma concentration curves, and log-transformed $AUC_t\;and\;C_{max}$ and log-untransformed $T_{max}$ values for two formulations were compared by statistical tests and analysis of variation. $AUC_t$ was determined to be $63.30{\pm}25.57{\mu}g.hr/ml$ for the test formulation and $64.02{\pm}29.27mg.hr/ml$ for the reference formulation. The mean values of $C_{max}$ for the test and reference formulations were $5.07{\pm}2.14\;and\;5.53{\pm}2.60{\mu}g/ml$, respectively. The $AUC_t,\;and\;C_{max}$ ratios of the test $Rozid^{TM}$ Tablet to the reference $Rulid^{TM}$ Tablet were -1.12% and -8.32%, respectively, showing that the mean differences were satisfied the acceptance criteria within 20%. The results from analysis of variance for log-transformed $AUC_t,\;and\;C_{max}$ indicated that sequence effects between groups were not exerted and 90% confidence limits of the mean differences for $AUC_t,\;and\;C_{max}$ were located in ranges from log 0.80 and log 1.25, satisfying the acceptance criteria of the KFDA bioequivalence. The RozidTM Tablet as the test formulation was considered to be bioequivalent to the RulidTM Tablet used as its reference formulation, based on $AUC_t,\;and\;C_{max}$ values.
PURPOSE. To investigate the microtensile bond strength between two all-ceramic systems; lithium disilicate glass ceramic and zirconia core ceramics bonded with their corresponding glass veneers. MATERIALS AND METHODS. Blocks of core ceramics (IPS e.max$^{(R)}$ Press and Lava$^{TM}$ Frame) were fabricated and veneered with their corresponding glass veneers. The bilayered blocks were cut into microbars; 8 mm in length and $1mm^2$ in cross-sectional area (n = 30/group). Additionally, monolithic microbars of these two veneers (IPS e.max$^{(R)}$ Ceram and LavaTM Ceram; n = 30/group) were also prepared. The obtained microbars were tested in tension until fracture, and the fracture surfaces of the microbars were examined with fluorescent black light and scanning electron microscope (SEM) to identify the mode of failure. One-way ANOVA and the Dunnett's T3 test were performed to determine significant differences of the mean microtensile bond strength at a significance level of 0.05. RESULTS. The mean microtensile bond strength of IPS e.max$^{(R)}$ Press/IPS e.max$^{(R)}$ Ceram ($43.40{\pm}5.51$ MPa) was significantly greater than that of Lava$^{TM}$ Frame/Lava$^{TM}$ Ceram ($31.71{\pm}7.03$ MPa)(P<.001). Fluorescent black light and SEM analysis showed that most of the tested microbars failed cohesively in the veneer layer. Furthermore, the bond strength of Lava$^{TM}$ Frame/Lava$^{TM}$ Ceram was comparable to the tensile strength of monolithic glass veneer of Lava$^{TM}$ Ceram, while the bond strength of bilayered IPS e.max$^{(R)}$ Press/IPS e.max$^{(R)}$ Ceram was significantly greater than tensile strength of monolithic IPS e.max$^{(R)}$ Ceram. CONCLUSION. Because fracture site occurred mostly in the glass veneer and most failures were away from the interfacial zone, microtensile bond test may not be a suitable test for bonding integrity. Fracture mechanics approach such as fracture toughness of the interface may be more appropriate to represent the bonding quality between two materials.
A bioequivalence study of $Gomcillin^{TM}$ capsules (DAEWOONG Pharmaceutical Co., Korea) to $Famoxin^{TM}$ capsules (Dong Wha Pharm. Ind. Co., Korea) was conducted according to the guideline of Korea Food and Drug Administration (KFDA). Twenty four healthy male Korean volunteers received each medicine at the amoxicillin dose of 500 mg in a $2{\times}2$ crossover study. There was a one-week wash out period between the doses. Plasma concentrations of amoxicillin were monitored by a high-performance liquid chromatography for over a period of 8 hours after the administration. $AUC_t$ (the area under the plasma concentration-time curve from time zero to 8 hr) was calculated by the linear trapezoidal rule method. $C_{max}$ (maximum plasma drug concentration) and $T_{max}$ (time to reach $C_{max}$) were compiled from the plasma concentration-time data. Analysis of variance was carried out using logarithmically transformed $AUC_t$ and $C_{max}$. No significant sequence effect was found for all of the bioavailability parameters indicating that the crossover design was properly performed. The 90% confidence intervals of the $AUC_t$ ratio and the $C_{max}$ ratio for $Gomcillin^{TM}/Famoxin^{TM}$ were $log0.91\;{\sim}\;log1.03$ and $;log0.93\;{\sim}\;log1.10$, respectively. These values were within the acceptable bioequivalence intervals of $log0.80\;{\sim}\;log1.25$. Thus, our study demonstrated the bioequivalence of $Gomcillin^{TM}$ and $Famoxin^{TM}$ with respect to the rate and extent of absorption.
Bioequivalence of two terazosin tablets, the $Hytrine^{TM}$ (Il-Yang Pharmaceutical Co., Ltd.) and the $Hytrine^{TM}$ (Daewon Pharmaceutical Co., Ltd.), was evaluated according to the guideline of KFDA. Sixteen normal male volunteers $(21{\sim}30\;years\;old)$ were divided into two groups and a randomized $2{\times}2$ cross-over study was employed. After one tablet containing 2 mg of terazosin was orally administered, blood was taken at predetermined time intervals and the concentration of terazosin in serum was determined with a HPLC method using spectrofluorometric detector. The pharmacokinetic parameters $(AUC_t,\;C_{max}\;and\;T_{max})$ were calculated and ANOVA was utilized for the statistical analysis of the parameters. The results showed that the differences in $AUC_t$$C_{max}$ and $T_{max}$ between two tablets were 6.02%,3.44% and -3.67%, respectively. The powers $(1-{\beta})$ for $AUC_t$, $C_{max}$ and $T_{max}$ were 98.05%, 98.34% and 29.81 %, respectively. Detectable differences $({\Delta})$ and confidence intervals were all less than ${\pm}20%$ except $T_{max}$. $AUC_t$ and $C_{max}$ met the criteria of KFDA for bioequivalence, indicating that $Terasin^{TM}$ tablet is bioequivalent to $Hytrine^{TM}$ tablet.
Cimetropium bromide, a quaternary ammonium compound which is chemically related to scopolamine, exhibits its antispasmodic activity by competing with acetylcholine for the muscarinic receptors of the smooth muscle of gastrointestinal tract. The drug has been used for the treatment of various disorders involving spasms of the musculature of the gastrointestinal, biliary and genitourinary tracts. The purpose of the present study was to evaluate the bioequivalence of two cimetropium bromide tablets, $Algiron^{TM}$ (Boehringer Ingelheim Korea Ltd.) and $Alpit^{TM}$ (Hana Pharmaceutical Co., Ltd.), according to the prior and revised guidelines of Korea Food and Drug Administration (KFDA). The cimetropium bromide release from the two cimetropium bromide tablets in vitro was tested using KP VII Apparatus II method with various different kinds of dissolution media (pH 1.2, 4.0, 6.8 buffer solution and water). Twenty normal male volunteers, $25.25{\pm}2.10$ years in age and $65.76{\pm}6.39$ kg in body weight, were divided into two groups and a randomized $2{\times}2$ cross-over study was employed. After three tablets containing 50 mg of cimetropium bromide per tablet were orally administered, blood was taken at predetermined time intervals and the concentrations of cimetropium bromide in serum were determined using HPLC method with UV detector. The dissolution profiles of two cimetropium bromide tablets were very similar at all dissolution media. Besides, the pharmacokinetic parameters such as $AUC_t,\;C_{max}\;and\;T_{max}$ were calculated and ANOVA test was utilized for the statistical analysis of the parameters using non-transformed and logarithmically transformed $AUC_t\;and\;C_{max}$. The results showed that the differences in $AUC_t,\;C_{max}\;and\;T_{max}$ between two tablets based on the $Algiron^{TM}$ were 2.19%, -5.97% and 3.49%, respectively. Minimum detectable differences $({\Delta})\;at \;{\alpha}=0.05\;and\;1-{\beta}=0.8$ were less than 20% (e.g., 13.71 %, 19.05% and 15.11% for $AUC_t,\;C_{max}\;and\;T_{max}$, respectively). The powers $(1-{\beta})\;at\;{\alpha}=0.05,\;{\Delta}=0.2\;for\;AUC_t$, $C_{max}\;and\;T_{max}$ were 97.79%, 83.22% and 95.60%, respectively. The 90% confidence intervals were within ${\pm}20%$ (e.g., $-5.84{\sim}10.21,\;-17.11{\sim}5.18\;and\;-5.35{\sim}12.33\;for\;AUC_t,\;C_{max}\;and\;T_{max}$, respectively). There were no sequence effect between two tablets in logarithmically transformed $AUC_t\;and\;C_{max}$. The 90% confidence intervals using logarithmically transformed data were within the acceptance range of log(0.8) to log(1.25) (e.g., $0.94{\sim}1.10\;and\;0.85{\sim}1.05\;for\;AUC_t\;and\;C_{max}$, respectively). Two parameters met the criteria of prior and revised KFDA guideline for bioequivalence, indicating that $Alpit^{TM}$ tablet is bioequivalent to $Algiron^{TM}$ tablet.
Terbinafine has a primary fungicidal action mediated by squalene epoxidase inhibition. Treated fungi accumulate squalene while becoming deficient in ergosterol, an essential component of fungal cell membranes. Bioequivalence of two terbinafine tablets, $Lamisil^{TM}$ (Novartis Korea Ltd., Seoul, Korea) and $Mycosil^{TM}$ (Daewon Pharmaceutical Co., Ltd., Seoul, Korea), was evaluated according to the guidelines of Korea Food and Drug Administration (KFDA). Sixteen normal male volunteers ($20\sim29$ years old) were randomly divided into two groups and a randomized $2\times2$ cross-over study was employed. After oral administration of $Mycosil^{TM}\;or\;Lamisil^{TM}$ (125 mg terbinafine), blood samples were taken at predetermined time intervals and the serum terbinafine concentrations were determined using an HPLC method with UV/VIS detector. The pharmacokinetic parameters $(AUC_t,\;C_{max}\;and\;T_{max})$ were calculated and ANOVA was utilized for the statistical analysis. The results showed that the differences in $AUC_t,\;C_{max}\;and\;T_{max}$ between two tablets based on the $Lamisil^{TM}$ tablet were $-2.24\%,\;-7.68\%\;and\;2.92\%$, respectively. The powers %(1-\beta)\;for\;AVC_t,\;C_{max}\;and\;T_{max}\;were\;87.11\%,\;95.36\%\;and\;99.99\%$, respectively. Minimum detectable differences $(\Delta)\;and\;90\%$ confidence intervals were all less than $\pm20\%$. All these parameters met the criteria of KFDA for bioequivalence, indicating that $Mycosil^{TM}$ tablet is bioequivalent to $Lamisil^{TM}$ tablet.
A bioequivalence study of Lovastati $n^{TM}$ tablets (Dong Sung Pharmaceutical Co., Korea) to Mevaco $r^{TM}$ tablets (Choong Wae Pharmaceutical Co., Korea) was conducted according to the guidelines (No. 98-56) of Korea Food and Drug Administration (KFDA). Each tablet contained 20 mg of lovastatin. Eighteen healthy Korean male subjects received each formulation at a lovastatin dose of 80 mg (i.e., four tablets) in a 2 $\times$ 2 crossover study. There was a washout period of a week between the dose of the two formulations. Plasma concentrations of lovastatin acid were monitored by a GC/MS method for over a period of 12hr after each administration. The area under the plasma concentration-time curve from time zero to 12hr (AUC) was calculated by a linear trapezoidal method. The maximum plasma drug concentration ( $C_{max}$) and the time to reach $C_{max}$ ( $T_{max}$) were compiled from the plasma drug concentration-time data. Analysis of variance (ANOVA) of these parameters revealed that there are no differences in AUC and $C_{max}$ between the formulations. The apparent differences between the formulations in these parameters were 4.87 and 8.03% for AUC and $C_{max}$, respectively. Minimum detectable differences (%) at $\alpha$=0.1 and 1-$\beta$=0.8 were 17.84 and 15.36% for AUC and $C_{max}$ respectively. The 90% confidence intervals were -15.30~5.56 and -17.02-0.95% for AUC and $C_{max}$, respective1y. Thus, the criteria of the KFDA guidelines for the bioequivalence was satisfied, indicating Mevaco $r^{TM}$ tablets and Dong Sung Lovastati $n^{TM}$ tablets are bioequivalent.ivalent.ent.alent.ent.
Doxazosin, a postsynaptic selective ${\alpha}1-adrenoceptor$ antagonist, is a potent antihypertensive agent which reduces peripheral resistance and blood pressure by vasodilatation of peripheral vessels. It is also used in the treatment of urinary obstruction by benign prostatic hypertrophy. The purpose of the present study was to evaluate the bioequivalence of two doxazosin tablets, $Cardura^{TM}$ (Pfizer Korea Ltd.) and $Cardil^{TM};$ (Kyungdong Pharmaceutical Co., Ltd.), according to the guidelines of Korea Food and Drug Administration (KFDA). Sixteen normal male volunteers, $24.19{\pm}2.48$ years in age and $62.41{\pm}6.66$ kg in body weight, were divided into two groups and a randomized $2{\times}2$ cross-over study was employed. After one tablet containing 2 mg of doxazosin was orally administered, blood was taken at predetermined time intervals and the concentrations of doxazosin in serum were determined with an HPLC method using spectrofluorometric detector. Pharmacokinetic parameters such as $AUC_t,\;C_{max}\;and\;T_{max}$ were calculated and ANOVA test was utilized for the statistical analysis of the parameters. The results showed that the differences in $AUC_t,\;C_{max}\;and\;T_{max}$ between two tablets were -1.54%, -1.51 % and 3.42%, respectively, when calculated against the $Cardura^{TM}$ tablet. The powers $(1-{\beta})$ for $AUC_t,\;C_{max}\;and\;T_{max}$ were all more than 99.00%. Minimum detectable differences $(\Delta)$ at ${\alpha}=0.05\;and\;1-{\beta}=0.8$ were all less than 20% (e.g., 12.73%, 12.84% and 13.01% for $AUC_t,\;C_{max}\;and\;T_{max}$, respectively). The 90% confidence intervals were all within :${\pm}20%$ (e.g., $-8.97{\sim}5.90,\;-9.01{\sim}6.00\;and\;-4.16{\sim}11.05\;for\;AUC_t,\;C_{max}\;and\;T_{max},\;respectively)$. All of the above para- meters met the criteria of KFDA for bioequivalence, indicating that $Cardil^{TM}$ tablet is bioequivalent to $Cardura^{TM}$ tablet.
Triflusal is a new antithrombotic agent which inhibits both platelet cyclooxygenase and c-AMP phosphodiesterase activity. The purpose of the present study was to evaluate the bioequivalence of two triflusal capsules, $Disgren^{TM}$ (Myung-In Pharmaceutical Co., Ltd.) and $Tigriri^{TM}$ (Hana Pharmaceutical Co., Ltd.) according to the guidelines of Korea Food and Drug Administration (KFDA). Eighteen normal male volunteers, $22.94{\pm}1.83$ in age and $63.7l{\pm}10.43$ kg in body weight, were divided into two groups and a randomized $2{\times}2$ cross-over study was employed. After one capsule containing 300 mg of triflusal was orally administered, blood was taken at predetermined time intervals and the concentrations of triflusal in serum were determined using HPLC method with UV detector. Pharmacokinetic parameters such as $AUC_t$$C_{max}$ and $T_{max}$ were calculated and ANOVA test was utilized for the statistical analysis of the parameters. The results showed that the differences in $AUC_t$$C_{max}$ and $T_{max}$ between two capsules were -0.30%, 0.81 % and -3.03%, respectively when calculated against the $Disgren_{TM}$ capsule. The powers $(1-{\beta})$ for $AUC_t$$C_{max}$ and $T_{max}$ were 98.29%,84.73% and 81.02%, respectively. Minimum detectable differences $({\Delta})$ at ${\alpha}=0.1$ and $1-{\beta}=0.8$ were all less than 20% (e.g., 12.91%, 18.46% and 19.65% for $AUC_t$$C_{max}$ and $T_{max}$ respectively). The 90% confid,ence intervals were all within ${\pm}20%$(e.g., $-8.97{\sim}8.37$, $-11.58{\sim}13.22$ and $-16.23{\sim}10.17$ for $AUC_t$$C_{max}$ and $T_{max}$, respectively). All of the above parameters ($1-{\beta}, {\Delta}$ and 90% confidence intervals) met the criteria of KFDA for bioequivalence, indicating that $Tigriri^{TM}$ capsule is bioequivalent to $Disgren^{TM}$ capsule.
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