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In the cefpodoxime study group, the average time receiving intravenous and oral antibiotics was 9.1 days at a total cost of $3040.26 for the 20 patients. In the control group, the average time receiving intravenous and oral antibiotics was 11.9 days at a total cost of $3961.26. A savings of $46.05 per patient was achieved. Patients receiving step-down therapy averaged 1 fewer day of hospitalization.
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Tween 80 and TPGS as surfactants and Capmul MCM as oil phase were found to produce stable nanoemulsions. Five formulations of SNEDDS had globule size of 55-60 nm and zeta potential of -4 to -11 mV. Self-emulsification time was between 221 and 370 s, while viscosity was dependent on composition of SNEDDS. Cloud point was above 70°C which indicated the retention of in vivo self-emulsifying properties. Average flux for cefpodoxime proxetil (CP) and SNEDDS was 0.104 and 0.985 µg/cm(2) min. Permeability was 19.72 and 206 for CP and SNEDDS. Liquid SNEDDS spray coated onto micropellets of microcrystalline cellulose (18-20#) were analysed by scanning electron microscope (SEM), self-emulsification and in vitro dissolution. A 5.36-fold increase in area under curve AUC(0-∞) was observed for CP-SNEDDS than plain drug. Minimum inhibitory concentration (MIC) was lower for SNEDDS. Liquid and SNEDDS micropellets were stable under accelerated conditions.
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A simple, selective and precise thin-layer chromatographic method has been developed for the analysis of eight cephalosporin antibiotics, namely cephadroxil, cephalexin, cefixime, cefaclor, cefpodoxime proxetil, cefuroxime axetil, cefotaxime sodium and ceftriaxone sodium. The hR(F) values of these cephalosporins were investigated on silica gel G-zinc ferrocyanide layers. Mixing of zinc ferrocyanide with silica gel G resulted in a decrease in hR(F) values, removal of tailing and better resolutions. The influence of silica gel G-zinc ferrocyanide ratio and mobile phases on the chromatographic behavior of cephalosporins on thin layers was investigated. Cephalosporins were selectively separated in their binary and ternary synthetic mixtures and pharmaceutical formulations. Quantitative separations of cephalosporins from their synthetic mixtures were also achieved with good recoveries (97.8-100.3%).
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Pathogenic bacteria were isolated from 90% of patients with acute otitis media. This higher-than-expected rate of positive cultures was probably related to the meticulous bacteriologic techniques used.
A simple, accurate, rapid and precise reversed-phase high-performance liquid chromatographic method has been developed and validated for simultaneous determination of cefpodoxime proxetil and dicloxacillin sodium in tablet. The chromatographic separation was carried out on kromasil C18 analytical column (250×4.6 mm; 5 μm) with a mixture of acetonitrile:methanol:trifloroacetic acid (0.001%) with pH 6.5 (30:50:20, v/v/v) as mobile phase; at a flow rate of 1.0 ml/min. UV detection was performed at 235 nm. The dicloxacillin sodium and cefpodoxime proxetil were eluted at 1.92 and 3.35 min, respectively. The peaks were eluted with better resolution. Calibration plots were linear over the concentration range 0.5-20 μg/ml for cefpodoxime proxetil (r(2)=0.9996) and 5-50 μg/ml for dicloxacillin sodium (r(2)=0.9987). The method was validated for accuracy, precision, linearity and specificity. The method was very sensitive with limit of detection 0.0726, 0.3685 μg/ml and limit of quantification 0.220, 1.116 μg/ml for cefpodoxime proxetil and dicloxacillin sodium, respectively. The high recovery and low relative standard deviation confirm the suitability of the method for routine determination of cefpodoxime proxetil and dicloxacillin sodium in bulk drug and tablet dosage form.
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The care strategy of pharyngitis has been changed dramatically these last years. Because of evolution of antibiotic resistance, the attitude which prevailed of the systematic treatment of pharyngitis in order to prevent a hypothetical acute rheumatic fever, could not persist. Discrimination between pharyngitis due to group A streptococcus (GAS) and nonstreptococcal pharyngitis (usually of viral causes) cannot be made in a reliable way by the clinical signs and symptoms, even if clinical scores are used. The free availability to practitioners of GAS rapid diagnostic tests, sensitive (>90%) and specific (>95%), changes the rule by simplifying it: pharyngitis with positive test must be treated with antibiotics, those with negative test should not be received such treatment. A reduction of two thirds of antibiotics consumption for pharyngitis can be expected, while maintaining the benefit (improvement of the clinical signs, reduction of contagiousness and the complications) for the patients for whom it is necessary. Because of GAS resistance to macrolides and the absence of resistance to beta-lactam antibiotics, a compound belonging of this last family should be prescribed and for a short treatment duration: amoxicillin (50 mg/kg/j, b.i.d for 6 days), cefpodoxime proxetil (8 mg/kg/j b.i.d for 5 days), cefuroxime axetil (30 mg/kg/j b.i.d for 4 days).
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Concurrently with administering a newly developed cephem derivative antibiotic (CEP), cefpodoxime proxetil (CPDX-PR, CS-807) dry syrup, to children with skin and soft tissue infections, activities of 7 drugs against a group of microorganisms were tested. The drugs tested included 4 drugs of the cephem group, R-3746, a Na-salt form of CPDX, cefaclor (CCL), cephalexin (CEX) and cefadroxil (CDX), and 3 drugs of the penicillin group, ampicillin (ABPC), methicillin (DMPPC) and cloxacillin (MCIPC). The bacterial strains tested were 71 strains of Staphylococcus aureus and 1 strain of Streptococcus pyogenes, all isolated from the above cases of pediatric infections. Inoculum sizes used in these tests were 10(6) and 10(8) cfu/ml. Ages of children in those cases to which the drug was administered ranged from 2 months to 15 years. A total of 66 cases were treated, including 60 cases of impetigo, 5 cases of subcutaneous abscess and 1 case of phlegmon. The drug was administered for an average of 6 days with a daily average dose level of 9.4 mg/kg divided into 3 doses except 1 case where a twice daily dose regimen was used. Clinical and bacteriological effects were examined, and the occurrence of adverse reactions and abnormal laboratory test results were recorded. The results of these tests are summarized below. 1. The activity test for R-3746 (Na-salt of CPDX) against 71 strains of S. aureus performed at an inoculum level of 10(8) cfu/ml showed 2 peaks of MIC values, one in a range of 1.56 to 6.25 micrograms/ml and the other higher than 100 micrograms/ml. The most prevalent MIC value was 3.13 micrograms/ml with MIC against 51 strains or 71.8% of the strains tested showing this value, and MIC values of 25 micrograms/ml or higher were obtained for 13 strains or 18.3% of the strains tested. The MIC80 was 6.25 micrograms/ml. Thus, R-3746 showed an antibacterial activity slightly weaker than MCIPC and DMPPC but similar to CCL, CEX and CDX. MIC values obtained at an inoculum level of 10(6) cfu/ml also had 2 peaks, one in a range of 1.56 to 3.13 micrograms/ml and the other higher than 25 micrograms/ml. Strains against which R-3746 had the MIC value of 3.13 micrograms/ml were the most numerous with 47 strains or 66.2%, and strains against which the MIC value of higher than 25 micrograms/ml was obtained were next with 13 strains or 18.3%.(ABSTRACT TRUNCATED AT 400 WORDS)
cepodem 100 tablet
Cefpodoxime demonstrates good in vitro activity against pathogens frequently associated with respiratory tract, urinary tract, and skin and tissue infections. It has not demonstrated greater efficacy than the other antibiotics to which it has been compared. The available published clinical trials are fraught with methodologic, statistical, and evaluative flaws. Thus, further trials comparing cefpodoxime with established treatments, as well as the newer cephalosporins, are needed before its place in therapy can be established.
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The value of MIC90 s cefdinir against these bacterial strains except penicillin non-sensitive pneumococci were 0.031-1 mg/L. Cefpodoxime held similar antibacterial activity with cefdinir, but was less potent against staphylococci. Cefaclor had much higher MIC values than other two drugs. After oral administration of 250 mg cefaclor, the drug concentration quickly reached peak concentration of 4.95 mg/L +/- 2.41 mg/L and the eliminative half time was 0.69 h +/- 0.6 h; the Tmax, Cmax and T1/2beta of cefdinir and cefpodoxime after oral administration of 100 mg were 2.5 h +/- 0.48 h, 0.81 mg/L +/- 0.19 mg/L, 1.73 h +/- 0.3 h and 2.38 h +/- 0.43 h, 1.12 mg/L +/- 0.28 mg/L, 1.92 h +/- 0.55 h, respectively. T > MIC of cefdinir in thrice daily administration were longer than 40% of medication interval against most of the tested isolates; no T > MIC period was found in cefpodoxime against staphylococci and the T > MICs of cefaclor after 250 mg oral administration were shorter than expected values against most bacteria.
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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.
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The pulmonary disposition of cefpodoxime was studied in 12 patients with pulmonary opacities after a single oral dose of 260 mg of cefpodoxime-proxetil, which is equivalent to 200 mg of cefpodoxime. Blood and lung tissue samples were collected during surgery, and bronchoalveolar lavage was carried out 3 h (group A) or 6 h (group B) after drug administration. Urea was used as an endogenous marker for measurement of the volume of epithelial lining fluid (ELF). Concentrations were measured by using a microbiological assay. The mean concentrations of cefpodoxime in plasma, ELF, and lung tissue were, respectively, 1.85 +/- 0.82 mg/liter, 0.22 +/- 0.13 mg/liter, and 0.89 +/- 0.80 mg/kg of body weight in group A and 1.40 +/- 1.25 mg/liter, 0.12 +/- 0.14 mg/liter, and 0.84 +/- 0.61 mg/kg in group B. Concentrations in lung parenchyma 6 h after dosing were at least equal to or above the MICs for 90% of the strains of most organisms commonly found in respiratory tract infections, whereas data for ELF suggest levels of drug insufficient to inhibit bacteria.