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PubMed1991

A review of the pharmacokinetics of cefpodoxime proxetil.

Cefpodoxime proxetil is an orally absorbed broad spectrum third generation cephalosporin antibacterial. It is a prodrug that is de-esterified in vivo to its active metabolite, cefpodoxime. After single- and multiple-dose (12-hourly) administration of cefpodoxime proxetil in the therapeutic dose range of 100 to 400mg of cefpodoxime equivalents, average peak plasma concentrations of cefpodoxime range from 1.0 to 4.5 mg/L and occur between 1.9 and 3.1 hours after administration. The half-life of cefpodoxime ranges from 1.9 to 2.8 hours. The absolute bio-availability of cefpodoxime proxetil tablets is 50%, and absorption is enhanced by concomitant administration of food. Raising gastric pH by pretreatment with antacids or H2-receptor antagonists results in reduced absorption. Binding of cefpodoxime to human plasma or serum protein is low (18 to 23%), suggesting that cefpodoxime should readily transfer across the capillary lining into tissues. Cefpodoxime undergoes minimal metabolism in humans. Drug not absorbed is degraded in the gastrointestinal tract and excreted in the faeces. As expected for a drug eliminated primarily by renal excretion, the disposition of cefpodoxime is altered in patients with impaired renal function; the half-life increases, while apparent plasma clearance and renal clearance decrease. The pharmacokinetics of cefpodoxime after oral administration of cefpodoxime proxetil are not affected by age.

Adolescent↗

PubMed1991

Pharmacokinetic and tolerance studies of cefpodoxime after single- and multiple-dose oral administration of cefpodoxime proxetil.

Cefpodoxime proxetil, a third generation, broad-spectrum, oral cephalosporin, was administered in single doses of 100, 200, 400, 600, and 800 mg (dose expressed as cefpodoxime equivalents) and multiple doses of 100, 200, and 400 mg twice daily to healthy volunteers. The pharmacokinetics of the active metabolite, cefpodoxime, and tolerance of cefpodoxime proxetil were determined. Results from the single-dose study indicate that cefpodoxime exhibits nonlinear pharmacokinetics over the dose range of 100 to 800 mg. This nonlinearity is primarily due to differences in dose-normalized AUC and Cmax, urinary recovery, and half-life between one or more of the higher-dose treatment groups and the 100-mg dosing group. After multiple-dose (twice daily) administration for 15 days, steady state is achieved on the second day of dosing, and there is no drug accumulation. Cefpodoxime pharmacokinetics are linear with dose over the clinically relevant dosing range of 100 to 400 mg. Microbiologic and HPLC plasma assay results are highly correlated, with close agreement between HPLC- and microbiologic-determined pharmacokinetic parameter estimates. Cefpodoxime proxetil was well tolerated in both studies. The most frequent medical events were related to gastrointestinal problems and consisted of transient loose stools in three subjects in the single-dose study and antibiotic-associated diarrhea in one subject in the multiple-dose study.

Administration, Oral↗

PubMed2003

An improved method for preparation of cefpodoxime proxetil.

Cefpodoxime proxetil, a third-generation cephalosporin for oral administration, was synthesized by a method based on the following sequence of reactions: acylation of 7-aminocephalosporanic acid (7-ACA) with S-benzothiazol-2-yl(2-amino-4-thiazolyl)(methoxyimino)thioacetate (MAEM), chloroacetylation of the cefotaxime formed with chloroacetyl chloride, esterification of the acid function with 1-iodoethyl isopropyl carbonate and final cleavage of chloroacetamide protective group by treatment with thiourea in N,N-dimethylacetamide. The developed procedure allows us to obtain better yields of cefpodoxime proxetil and to eliminate the final purification step by column chromatography, necessary during the synthesis of this antibiotic by the previously reported methods.

Acetates↗

PubMed1991

Microbiological evaluation of cefpodoxime proxetil.

Cefpodoxime, the active de-esterified molecule of the orally absorbable cephalosporin cefpodoxime proxetil, inhibits streptococci, Neisseria spp., and most Enterobacteriaceae, with MIC50 and/or MIC90 values of less than or equal to 2 mg/L; with regard to the latter family of bacteria, the MIC50 and/or MIC90 values of cefpodoxime are consistently greater than or equal to 4 mg/L for only Enterobacter cloacae, Citrobacter freundii, Serratia marcescens, and Morganella morganii. The MIC50 of cedpodoxime for coagulase-negative staphylococci is greater than 2 mg/L, while the MIC for Staphylococcus aureus strains is 4 mg/L. In comparison with other orally absorbable cephalosporins, cefpodoxime is slightly less active than cefixime, cefetamet, and cefotiam against Gram-negative bacteria, but more active than cefuroxime, cefaclor, and cefalexin. Against staphylococci, the activity of cefpodoxime is comparable to that of cefotiam and cefuroxime, and superior to that of cefaclor, while cefixime and cefetamet have insufficient activity against these species. In common with other cephalosporins, cefpodoxime has no activity against enterococci. In vitro models simulating human serum cefpodoxime concentrations demonstrate that a dosage regimen of 200mg is probably sufficient to treat most infections. However, further study is needed to clarify whether infections due to bacteria such as S. aureus, with higher cefpodoxime MICs, can be treated with this dose regimen.

Ceftizoxime↗

PubMed1993

In vitro antimicrobial activities of lactoferrin, its concomitant use with cefpodoxime proxetil and clinical effect of cefpodoxime proxetil.

As one of the biodefense mechanisms, lactoferrin (LFN) in the secreta of female genital organ may be an interesting biological material in view of its antimicrobial activity. In the present study, we investigated antimicrobial activities of LFN and its combination with cefpodoxime proxetil (CPDX-PR), we also as evaluated clinical effect of CPDX-PR. The following results were obtained. 1. Antimicrobial activities of LFN were tested against 15 strains of 10 species of bacteria, and potent activities against Staphylococcus aureus 209P, Escherichia coli, Klebsiella pneumoniae and Proteus spp. were found. 2. In a concomitant use of LFN with CPDX-PR (a checkerboard method), synergistic actions were observed against S. aureus 209P, E. coli STf, K. pneumoniae 602 and Pseudomonas aeruginosa 1046, and additive actions against E. coli NIHJ and Providencia rettgeri 1603. In 3 strains, the MICs of CPDX-PR in the presence of LFN were reduced to < 1/64. 3. In the evaluation of clinical effect of CPDX-PR, efficacy rates were 53/57 (92.9%) in a patient group with infections. The incidence of adverse reaction was 0/57.

Bacteria↗

PubMed2006

Investigation on physicochemical and biological differences of cefpodoxime proxetil enantiomers.

Cefpodoxime proxetil (CP) is a prodrug of cefpodoxime acid (CA), and is supplied as racemic mixture of R- and S-enantiomers. CP has only 50% absolute bioavailability, and the reasons responsible for low bioavailability remain poorly understood. The present work ascertains physicochemical and biological properties of individual isomers of CP and explores their capacity to optimize delivery of CP. Both isomers showed similar pH stability behavior, but R-isomer was more susceptible to enzymatic metabolism compared to S-isomer, when incubated with enzymes collected from various segments of GIT. Based on the in vitro and in vivo results, use of S-isomer for development of a dosage form such as gastro-retentive dosage form can improve oral bioavailability of CP.

Administration, Oral↗

PubMed1988

[Clinical evaluation of cefpodoxime proxetil in the treatment of skin and soft tissue infections. A double blind comparison of cefpodoxime proxetil and cefaclor].

In order to objectively evaluate the effectiveness, safety and usefulness of the new oral cephem cefpodoxime proxetil (CS-807, CPDX-PR) for the treatment of skin and soft tissue infections, a double-blind comparative study was undertaken using cefaclor (CCL) as the control drug. CPDX-PR and CCL were administered for 7 days at daily doses of 400 mg (divided into 2 portions) and 750 mg (divided into 3 portions), respectively. A total of 243 patients (118 in the CPDX-PR group and 125 in the CCL group) was treated in this study. The effectiveness, safety and usefulness were evaluated in 222 (106 in the CPDX-PR group and 116 in the CCL group), 234 (113 in the CPDX-PR group and 121 in the CCL group) and in 223 patients (107 in the CPDX-PR group and 116 in the CCL group), respectively. There were no differences in patients' backgrounds between the 2 groups, except for the presence or the absence of surgical treatments. The results we obtained are summarized below: 1. In the evaluation of clinical efficacy by the subcommittee, excellent, good, fair and poor efficacy were observed in 36, 43, 17 and 10 patients in the CPDX-PR group, respectively; the efficacy rate was, therefore, calculated to be 74.5%. As for the CCL group, respective results were observed in 50, 39, 17 and 10 patients, indicating an efficacy rate of 76.7%. There was no significant difference between the 2 groups. Improvement rates judged by physicians in charge were 80.2% in the CPDX-PR group and 88.8% in the CCL group. Moreover, no significant difference in diseases or severity were found between the 2 groups. 2. As for the bacteriological efficacy, the 2 groups showed high elimination rates, as 90.1% and 91.6% of the disease causing bacteria were eliminated in the CPDX-PR group and in the CCL group, respectively. Elimination rates in single infections with Staphylococcus aureus were determined to be 85.7% in the CPDX-PR group and 85.0% in the CCL group. 3. Although 6 patients in the CPDX-PR group and 2 patients in the CCL group developed side effects, which were mainly gastrointestinal symptoms, there was no significant difference in the incidence of side effects between the 2 groups. Abnormal laboratory values were found in 5 patients in the CPDX-PR group and 1 patient in the CCL group. 4. There was no significant difference in the usefulness between the 2 groups.(ABSTRACT TRUNCATED AT 400 WORDS)

Abscess↗

PubMed2000

Cerebrospinal fluid pharmacokinetics of cefpodoxime proxetil in piglets.

Cefpodoxime is an oral third-generation cephalosporin used for the treatment of acute upper-respiratory tract infections caused by susceptible bacteria in children. Although not indicated for the treatment of bacterial meningitis, it is used to treat other infections produced by organisms associated with meningitis and may obscure the result of cerebrospinal fluid (CSF) cultures in children who develop meningitis while receiving oral antibiotics if sufficient concentrations are achieved in the CSF. This study evaluated the disposition of cefpodoxime and penetration into CSF in piglets. Fifteen Landacre-Camborough cross piglets (10-20 days old) received cefpodoxime proxetil oral suspension (10 mg/kg). Repeated plasma and CSF samples were collected over 24 hours for quantitation of cefpodoxime by HPLC. Pharmacokinetic analysis was performed on both plasma and CSF data. The plasma concentration versus time data for cefpodoxime were best characterized using a one-compartment model with first-order absorption. The mean (+/- SD) pharmacokinetic parameters for Cmax, tmax, and AUC0-infinity were 23.3 +/- 12.9 mg/L, 3.9 +/- 1.4 h, and 237 +/- 129 mg/L.h, respectively. CSF/plasma ratios for AUC0-infinity demonstrated a mean cefpodoxime penetration of approximately 5%. CSF penetration of cefpodoxime was evident following a single oral dose of cefpodoxime proxetil suspension. Despite the small percentage of total cefpodoxime dose distributing into the CSF, the resultant concentrations approached or exceeded the MIC90 for many bacterial pathogens considered susceptible to cefpodoxime. Accordingly, clinicians should use caution in the interpretation of CSF cultures in patients who develop clinical signs and symptoms consistent with meningitis and who have been previously treated with cefpodoxime.

Animals↗

PubMed1991

Cefpodoxime proxetil in the treatment of lower respiratory tract infections.

Cefpodoxime proxetil is the orally absorbed ester of cefpodoxime, a new third generation cephalosporin. In the gastrointestinal tract, cefpodoxime proxetil is hydrolysed to cefpodoxime, which has potent antibacterial activity against the major bacterial pathogens involved in lower respiratory tract infections: Haemophilus influenzae, Moraxella (Branhamella) catarrhalis (including beta-lactamase-producing strains), and Streptococcus pneumoniae (including amoxicillin-resistant strains). Six randomised comparative studies in patients with lower respiratory tract infections, 5 of which were large (enrollment of more than 200 patients) and double-blind, examined the efficacy and safety of cefpodoxime proxetil. Cefpodoxime proxetil (at a dosage equivalent to 200mg of cefpodoxime) administered twice daily for 5 to 10 days was similar in clinical and bacteriological efficacy to the following: amoxicillin 500mg 3 times daily in the treatment of community-acquired pneumonia; intramuscular ceftriaxone Ig once daily in the treatment of pulmonary infections in hospitalised patients; and to amoxicillin/clavulanic acid 500/125mg 3 times daily in the treatment of acute exacerbations of chronic bronchitis (AECB). Additionally, a dosage equivalent to 100mg or 200mg of cefpodoxime twice daily was similar in clinical and bacteriological efficacy to amoxicillin 250mg 3 times daily in the treatment of bronchitis (acute or AECB). The adverse events noted with cefpodoxime proxetil administration were similar to those associated with other beta-lactam antibacterials and most commonly involved the gastrointestinal tract and skin or mucous membranes. Thus, cefpodoxime proxetil is a useful addition to the antibacterials available for the treatment of infections of the lower respiratory tract.

Aged↗

PubMed1996

Concentrations of cefpodoxime in plasma, adenoid, and tonsillar tissue after repeated administrations of cefpodoxime proxetil in children.

Cefpodoxime proxetil was administered to 36 children undergoing tonsillectomy, adenoidectomy or both. It was very well tolerated. The detectable tissue concentrations of cefpodoxime were moderate but remained constant (approximately 0.05 mg/kg) 3, 6, and 12 h after the last dose of the drug, while the respective plasma concentrations were declining. This suggests the possibility of twice-daily administration. However, 30% of children did not have quantifiable concentrations in the tonsil and more than half the adenoids did not have quantifiable levels. Whether a higher dosage would lead to higher and more satisfactory tissue concentrations is a matter for further investigation.

Adenoids↗

PubMed1989

[Clinical evaluation of a new oral cephem, cefpodoxime proxetil in children].

Cefpodoxime proxetil (CPDX-PR, CS-807) was evaluated for its efficacy, safety and pharmacokinetics in children. CPDX-PR was effective in 93.6% of 47 cases with respiratory tract, middle ear, skin or urinary tract infections. Twice or 3 times daily administration of 3 mg/kg each was sufficient to treat streptococcal pharyngitis and Haemophilus influenzae infections. No severe adverse reaction was encountered in 52 cases treated with CPDX-PR. The serum half-life was approximately 2.17 +/- 0.24 hours after oral administration.

Administration, Oral↗

PubMed1992

Disposition of cefpodoxime proxetil in hemodialysis patients.

The disposition of cefpodoxime after single, oral 200-mg doses of cefpodoxime proxetil (cefpodoxime equivalents) was investigated in an open-label study of six patients with end-stage renal disease currently maintained on hemodialysis. Subjects were randomly assigned to one of two treatment groups, which differed in the sequence of the interdialytic and intradialytic periods. Doses were separated by at least 2 weeks. Blood samples were serially collected for 48 hours after each treatment; if obtainable, urine was also collected over this same period. During the intradialytic period, hemodialysis was scheduled to begin approximately 3 hours after dosing, and dialysate was collected before and until the end of dialysis. Average cefpodoxime elimination half-life for the interdialytic period was 18.0 +/- 6.5 hours; apparent total body clearance was 28.6 +/- 13 mL/minute. The half-life during hemodialysis, 2.66 +/- 0.74 hours, was considerably shorter than that after hemodialysis, 19.2 +/- 3.5 hours, in the intradialytic period of the study. Hemodialysis clearance of cefpodoxime was 120 +/- 31 mL/minute, which was 57.1 +/- 13% and 71.7 +/- 25% of the hemodialysis clearance for urea nitrogen and creatinine, respectively. The 2.86 +/- 0.25 hour hemodialysis session removed 22.4 +/- 2.9% of the administered dose, as assessed by cefpodoxime recovery in dialysate. A maximum rebound in cefpodoxime plasma concentration of 0.41 +/- 0.33 mcg/mL was observed, at about one-half hour after the end of hemodialysis. Based on these results, dosage adjustment is not required, but extension of the dosing interval is warranted.(ABSTRACT TRUNCATED AT 250 WORDS)

Administration, Oral↗

PubMed1992

Pharmacokinetics of cefpodoxime proxetil and interactions with an antacid and an H2 receptor antagonist.

Cefpodoxime proxetil is a new oral esterified cephem antibiotic with a broad antibacterial spectrum. The dissolution of cefpodoxime proxetil is pH dependent. The objectives of this study were to characterize the pharmacokinetics of cefpodoxime proxetil in two different oral doses and to examine possible interactions with an antacid, aluminum magnesium hydroxide (Maalox 70), and an H2 receptor antagonist, famotidine. Two studies involving the same 10 healthy volunteers were performed. In the first study, cefpodoxime proxetil was administered in two doses, 0.1 and 0.2 g. In the second study, two interventions were performed in a randomized crossover design. For one intervention, the volunteers were pretreated with 40 mg of famotidine 1 h before 0.2 g of cefpodoxime proxetil was administered. In the second trial, participants were given 10 ml of Maalox 70 2 h and 10 ml of Maalox 70 15 min before they received 0.2 g of cefpodoxime proxetil. Serum and urine concentrations were determined by high-performance liquid chromatography. For the statistical evaluation, these data were tested by using the pharmacokinetics of 0.2 g of cefpodoxime proxetil from the first study. The maximum concentrations were 1.19 +/- 0.32 mg/liter after 0.1 g of cefpodoxime proxetil and 2.54 +/- 0.64 mg/liter after 0.2 g of cefpodoxime proxetil. The elimination half-lives were 149 min for 0.1 g and 172 min for 0.2 g of cefpodoxime proxetil. The total increase in the area under the concentration-time curve (AUC) was dose dependent. Combination with Maalox 70 caused a reduction in the AUC from 14.0 +/- 3.9 to 8.44 +/- 1.85 mg.h/liter. After famotidine, the AUC decreased to 8.36 +/- 2.0 mg . h/liter. Corresponding changes were registered for the maximum concentration of drug in serum, 24-h urine recovery, and the time to maximum concentration of drug serum. Cefpodoxime proxetil was well tolerated without any seriously adverse drug reactions.

Administration, Oral↗

PubMed1995

The bioavailability of cefpodoxime proxetil tablets relative to an oral solution.

The bioavailability of cefpodoxime proxetil tablets relative to an oral solution of cefpodoxime proxetil in a sucrose/alcohol/citric acid vehicle was studied in 11 healthy volunteers in a randomized, crossover study. Fasted subjects took one cefpodoxime proxetil 100 mg tablet or 50 mL of a 2 mg mL-1 cefpodoxime proxetil oral solution on two separate occasions. In a third study period, all subjects took a 100 mg dose of the oral solution with a high-fat meal to investigate the effect of food on cefpodoxime proxetil absorption from the oral solution. Serial blood samples were obtained over a 24 h period, and urine was collected for 48 h after dosing. Cefpodoxime concentrations in plasma and in urine were determined using HPLC methods. The bioavailability of cefpodoxime proxetil tablets relative to the oral solution was 82%, as determined from AUC ratios. There was no difference in the rate of cefpodoxime absorption between dosage forms. Food had no effect on the extent of drug absorption from the oral solution but did result in delayed absorption. These results suggest that complete dissolution of cefpodoxime proxetil is critical for optimal bioavailability.

Administration, Oral↗

PubMed1990

Pharmacokinetics and inflammatory fluid penetration of cefpodoxime proxetil in volunteers.

The pharmacokinetics of cefpodoxime were determined after a single oral dose of 261 mg of cefpodoxime proxetil, equivalent to 200 mg of cefpodoxime, was given to each of six healthy male volunteers. Concentrations in serum, urine, and cantharidin-induced inflammatory fluid were measured by a microbiological assay. The mean peak level in plasma was 2.1 micrograms/ml, attained at a mean time of 2.9 h. The mean half-life of elimination from serum was 2.2 h. The inflammatory exudate was penetrated moderately rapidly, the mean peak level being 1.7 micrograms/ml at 3.5 h. The mean percent penetration of the inflammatory exudate was 103.7. The mean 24-h urine recovery of cefpodoxime was 32.2%. This study suggests that cefpodoxime proxetil taken once or twice daily will be sufficient to treat urinary or systemic infections caused by susceptible pathogens.

Adult↗

PubMed1992

Cefpodoxime proxetil. A review of its antibacterial activity, pharmacokinetic properties and therapeutic potential.

Cefpodoxime proxetil is an orally administered prodrug which is absorbed and de-esterified by the intestinal mucosa to release the third generation cephalosporin, cefpodoxime. Cefpodoxime is stable towards the most commonly found plasmid-mediated beta-lactamases and the drug has a broad spectrum of antibacterial activity encompassing both Gram-negative and Gram-positive bacteria, rendering it a possible option for empirical use in a wide range of community acquired infections in both adult and paediatric patients. The extended plasma half-life of cefpodoxime (1.9 to 3.7 h) permits twice daily administration. In comparative trials, twice daily cefpodoxime proxetil (dose equivalent cefpodoxime 100 to 400 mg) was as effective as a 3- to 4-times daily regimen of phenoxymethylpenicillin in pharyngotonsillitis, as well as thrice daily amoxicillin (with or without clavulanic acid) or cefaclor against infections of the ear, the upper and lower respiratory tract, the urinary tract and those of the skin and soft tissues. The latter reflects the enhanced antistaphylococcal activity of cefpodoxime, which distinguishes it from other orally active third generation cephalosporins such as cefixime. Most notably, an oral regimen of cefpodoxime proxetil was as efficacious as parenterally administered ceftriaxone for the treatment of bronchopneumonia in hospitalised patients at risk due to the presence of underlying diseases, addictions or advancing age. A single oral dose of cefpodoxime was also as efficacious as ceftriaxone in uncomplicated anogenital gonococcal infections. Cefpodoxime proxetil is generally well tolerated, with mild to moderate gastrointestinal disturbances occurring in 4 to 15% of patients treated with therapeutic doses. Thus, a convenient twice daily oral regimen of cefpodoxime proxetil can be prescribed as an effective alternative to established beta-lactam therapies in the empirical outpatient treatment of infections of the respiratory and urinary tracts as well as those of the skin and soft tissues.

Animals↗

PubMed2001

Cefpodoxime proxetil: a review of its use in the management of bacterial infections in paediatric patients.

UNLABELLED: Cefpodoxime proxetil is an oral third generation cephalosporin with a broad spectrum of antibacterial activity. The drug has in vitro activity against many common Gram-positive and Gram-negative pathogens associated with common paediatric infections, making the drug a useful option for empirical therapy. In randomised controlled trials conducted in children with acute otitis media, oral cefpodoxime proxetil 8 to 10 mg/kg/day (usually administered in 2 divided doses) for 5 to 10 days was at least as effective as standard regimens of amoxicillin/ clavulanic acid, cefixime, cefuroxime axetil or cefaclor as assessed by either clinical or bacteriological criteria. Cefpodoxime 8 to 10 mg/kg/day (administered in 2 divided doses) for 5 to 10 days was at least as effective as standard 10-day regimens of penicillin V in the treatment of children with pharyngitis and/or tonsillitis. Significant differences in favour of cefpodoxime proxetil were demonstrated in terms of clinical (1 study) and bacteriological (2 studies) criteria. The clinical efficacy of 5 days of treatment with cefpodoxime proxetil is similar to that of 10 days of treatment with penicillin V. In children with lower respiratory tract infections (primarily pneumonia), clinical and bacteriological efficacy rates achieved with cefpodoxime proxetil treatment were similar to those produced by cefuroxime axetil or amoxicillin/clavulanic acid in randomised controlled trials. Cefpodoxime proxetil also demonstrated clinical efficacy in paediatric patients with skin and soft tissue infections. In randomised studies that included both adults and children with a variety of infections (e.g. abscess, atheroma, furuncle and carbuncle, infected wounds, cellulitis), cefpodoxime proxetil showed efficacy similar to that of cefuroxime axetil or cefaclor. Cefpodoxime proxetil is well tolerated by paediatric patients, with adverse events (primarily gastrointestinal tract disturbances and skin rashes) that are consistent with those reported for other oral cephalosporins. CONCLUSION: Cefpodoxime proxetil is a third generation cephalosporin with a broad spectrum of antibacterial activity and a favourable pharmacokinetic profile which allows twice-daily administration. It is generally well tolerated and demonstrates good bacteriological and clinical efficacy in paediatric patients with various infectious diseases, including acute otitis media, tonsillitis and/or pharyngitis. Based on these characteristics, cefpodoxime proxetil is a suitable option for the treatment of paediatric patients with various common bacterial infections.

Acute Disease↗

PubMed1989

[Study of efficacy, safety and dosage on cefpodoxime proxetil in pediatric infections].

Cefpodoxime proxetil (CS-807, CPDX-PR), a new cephalosporin antibiotic, was investigated for its usefulness in pediatrics. 1. The total number of patients treated were 21 with their ages ranging from 3 months to 9 years and 1 month, consisting of 5 male and 16 female infants. 2. Single dosages of the drug ranged between 4.4 mg and 5.8 mg/kg with oral administration for 3 times daily in fasting. A total aggregated dosage was between 46.4 mg/kg and 200.0 mg/kg. The length of administration was 3 to 12 days. 3. The breakdown of symptoms were 9 cases of acute pharyngitis, 5 cases of acute tonsillitis, 3 cases of acute bronchitis, and 1 case each of impetigo + purulent rhinitis, cervical lymphadenitis, scarlet fever, and urinary tract infection. 4. The clinical efficacy rate was 100% with 18 excellent responses and 3 good responses. 5. The bacteriological efficacy rate was 90.9% in eradication rate, based on results on 17 strains of suspected causative microorganism among which 10 strains were eradicated, 1 strain was decreased, and 6 strains were unknown. 6. There was no side effect during the treatment and after the discontinuation, while, in clinical laboratory tests, GOT and GPT were elevated in 1 case which was judged as abnormal. No patient refused the drug. CPDX-PR was considered to be very useful drug because of its excellent efficacy and safety in pediatrics in treating infectious diseases.

Administration, Oral↗