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Omnicef (Cefdinir)

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Generic Omnicef is effective against susceptible bacteria causing infections of the middle ear (otitis media), tonsils (tonsillitis ), throat, larynx (laryngitis), bronchi (bronchitis), lungs (pneumonia), and skin and other soft tissues.

Other names for this medication:
Cefdinir, Cefix, Cefixima, Cefixime, Cefspan, Ceftas, Ceftinex, Denvar, Hifen, Mahacef, Milixim, Novacef, Omnix, Oroken, Sefdin, Suprax, Taxim, Topcef, Tricef, Unixime, Ziprax

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Amoxil, Bactrim, Ampicillin, Augmentin, Biaxin

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Also known as:  Cefdinir.


Generic Omnicef is a semi-synthetic (partially man-made) oral antibiotic in the cephalosporin family of antibiotics. Like other cephalosporins cefdinir stops bacteria from multiplying by preventing bacteria from forming walls that surround them. The walls are necessary to protect bacteria from their environment and to keep the contents of the bacterial cell together. Bacteria cannot survive without a cell wall. Generic Omnicef is active against a very wide spectrum of bacteria, including Staphylococcus aureus; Streptococcus pneumoniae; Streptococcus pyogenes (the cause of strep throat); Hemophilus influenzae; Moraxella catarrhalis; E. coli ; Klebsiella; and Proteus mirabilis. It is not active against Pseudomonas. Therapeutic uses of cefdinir include otitis media (infections of the middle ear), infections of soft tissues, and respiratory tract infections.

Generic name of Generic Omnicef is Cefdinir.

Omnicef is also known as Cefdinir, Sefdin, Adcef.

Brand name of Generic Omnicef is Omnicef.


Generic Omnicef is taken once or twice daily, depending on the nature and severity of the infection.

The capsules or suspension can be taken with or without food.

Patients with advanced renal disease may need to take lower doses to prevent accumulation of cefdinir since it is eliminated from the body by the kidneys.

For adult infections the usual dose is 300 mg every 12 hours or 600 mg per day for 5-10 days depending on the nature and severity of the infection.

The recommended dose for children 6 months to 12 years of age is 7 mg/kg every 12 hours or 14 mg/kg per day for 5-10 days depending on the infection.

For most infections once daily dosing is as effective as twice daily dosing, though once daily dosing has not been evaluated for the treatment of skin infections or pneumonia.

Do not stop taking Generic Omnicef suddenly.


If you overdose Generic Omnicef and you don't feel good you should visit your doctor or health care provider immediately.


Store at room temperature between 20 and 25 degrees C (68 and 77 degrees F) away from moisture and heat. Throw away any unused medicine after the expiration date. Keep out of the reach of children.

Side effects

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Side effect occurrence does not only depend on medication you are taking, but also on your overall health and other factors.


Do not use Generic Omnicef if you are allergic to Generic Omnicef components.

Do not take Generic Omnicef while you are pregnant or have nurseling.

Try to be careful with Generic Omnicef usage in case of having asthma, emphysema or bronchitis along with asthma, certain heart problems (e.g., congestive heart failure, cardiogenic shock, heart block or any conduction or sinus node problems, very slow heartbeat), untreated blood mineral imbalance (electrolyte imbalance), very low blood pressure, kidney or liver problems.

Avoid alcohol.

It can be dangerous to stop Generic Omnicef taking suddenly.

omnicef dosage peds

Oral cephalosporins have not previously been extensively tested against larger numbers of Borrelia burgdorferi isolates derived from different clinical and geographical sources. This study investigated the in vitro activity of eight oral cephalosporins in addition to ceftriaxone and apramycin, against 17 isolates of the B. burgdorferi complex, including one B. valaisiana and one B. bissettii tick isolate. Minimal inhibitory concentrations and minimal borreliacidal concentrations providing 100% killing of the final inoculum were determined by a standardised methodology in Barbour-Stoenner-Kelly-medium after 72 h of incubation. The rank order of potency was ceftriaxone>cefuroxime-axetil>cefixime, cefdinir>cefpodoxime>cefaclor >ceftibuten, loracarbef>cefetamet-pivoxil, apramycin. Our study demonstrates the superior in vitro effectiveness of ceftriaxone with good to excellent activity with the oral agents cefuroxime-axetil, cefixime and cefdinir against B. burgdorferi under strictly standardised test conditions.

omnicef antibiotic cefdinir

A 5-day regimen of cefdinir was effective in the eradication of the common causative pathogens of nonrefractory AOM, including intermediate penicillin-resistant S. pneumoniae and beta-lactamase-producing organisms. Cefdinir should be considered a suitable second line antibiotic for AOM.

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CS-834 is a prodrug of the carbapenem R-95867, developed by Sankyo Co., Ltd., Tokyo, Japan. To investigate the possibility that CS-834 may be the first carbapenem usable in an oral dosage form, its in vitro antibacterial activity (as R-95867) and in vivo antibacterial activity were compared with those of cefpodoxime proxetil, cefditoren pivoxil, cefdinir, ofloxacin, imipenem, and amoxicillin. R-95867 had high levels of activity against methicillin-susceptible staphylococci and streptococci, including penicillin-resistant Streptococcus pneumoniae, as well as Neisseria gonorrhoeae, Moraxella catarrhalis, the members of the family Enterobacteriaceae (with the exception of Serratia marcescens), Haemophilus influenzae, and Bordetella pertussis; for all these strains, the MICs at which 90% of tested strains are inhibited (MIC90s) were 1.0 microg/ml or less. Against methicillin-resistant staphylococci, enterococci, Serratia marcescens, Burkholderia cepacia, Stenotrophomonas maltophilia, and Acinetobacter calcoaceticus, R-95867 showed activity comparable to or slightly less than that of imipenem, with MIC90s ranging from 2 to >128 microg/ml. The in vivo efficacy of oral CS-834 against experimental mouse septicemia caused by gram-positive and gram-negative bacteria was better than that of comparative drugs. In murine respiratory infection models, the efficacy of CS-834 reflected not only its potent in vitro activity but also the high levels present in the lungs.

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Group A beta-hemolytic streptococcus (GABHS) is the most common bacterial cause of acute pharyngitis. Although children infected with GABHS will recover clinically without antibiotics, treatment is recommended in order to prevent acute rheumatic fever and probably suppurative complications, hasten resolution of clinical signs and symptoms, and prevent transmission to close contacts. Streptococcal pharyngitis usually cannot be reliably distinguished from other etiologies on the basis of epidemiologic or physical findings, and therefore a throat culture or a rapid antigen detection test is generally necessary to confirm the diagnosis. All isolates of GABHS are sensitive to penicillins and cephalosporins, whereas resistance to macrolides has been identified in some geographic regions. The recommended first-line therapy for streptococcal pharyngitis is a 10-day course of penicillin V, usually given 2 or 3 times per day. A number of alternatives to penicillin V are available, including other penicillins, macrolides, and cephalosporins. As a class, the cephalosporins are noteworthy because they may provide somewhat higher bacteriologic eradication rates than penicillin V. Many cephalosporins can be administered twice daily, but they also must be given for 10 days. Two third-generation cephalosporins, cefdinir and cefpodoxime proxetil, are approved for use in a more convenient 5-day dosing schedule, thus possibly increasing the likelihood of adherence to the full course of therapy. Palatability is also an important consideration when prescribing antibiotics to children. In a series of studies, children preferred the pleasant strawberry-cream taste of cefdinir to that of amoxicillin/clavulanate, cefprozil, and azithromycin. Cefdinir may offer an alternative to penicillin V for children with streptococcal pharyngitis, particularly when compliance is a clinical concern.

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Impetigo can result from Staphylococcus aureus (S. aureus). Wolf's isotopic response is the occurrence of a new cutaneous disorder at the site of a previously healed disease. A cutaneous immunocompromised district is an area of skin that is more vulnerable than the rest of the individual's body.

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A multicenter US trial comparing antibiotics-first to appendectomy, including outpatient management, is feasible to evaluate efficacy and safety.

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Cefdinir (CFDN, FK482) was evaluated in children with infections. CFDN was given at a daily dose of 6.4-19.8 mg/kg in 2 or 3 divided portions. CFDN was effective in 94% of 32 cases with respiratory tract, middle ear, urinary tract or skin structure infections. Side effects were loose stool and diarrhea (12.5%). In a pharmacokinetic study, 6.0 mg/kg of CFDN was given to each of the subjects before meal. Cmax was 0.81 +/- 0.38 microgram/ml, T 1/2 was 2.31 +/- 0.77 hours. Antibacterial activity against Staphylococcus aureus was the most excellent of oral cephem antibiotics tested. The data suggest that CFDN 10% granular preparation is safe and effective when used in children with infections caused by susceptible bacteria.

omnicef penicillin allergy

Etest, a stable-gradient antimicrobial susceptibility test method (AB Biodisk, Solna, Sweden), was compared to the agar dilution method for tests with amikacin, tobramycin, aztreonam, cefdinir, cefprozil, ceftazidime and sparfloxacin. The study design followed recommended guidelines for 510(k) application by the U.S. Food and Drug Administration (FDA). Results demonstrated Etest accuracy (MIC +/- 1.0 log2 dilutions compared to agar dilution MIC) to be 90.4% with only one of 1150 comparisons showing a reproducible variation of 2 log2 dilutions. Categorical equivalency was > or = 92% for all drugs except ceftazidime (82 to 89%), but false-susceptible error was rare (< 0.1%). Etest was very reproducible (100% of results +/- 1.0 log2 dilution) and quality control results conformed to published MIC ranges. The Etest seems to render accurate results for these seven antimicrobial agents evaluated.

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The minimum inhibitory concentrations (MICs) of tosufloxacin (TFLX), levofloxacin (LVFX), ciprofloxacin (CPFX), gatifloxacin (GFLX), sparfloxacin (SPFX), azithromycin (AZM), cefteram (CFTM), cefdinir (CFDN) and cefpodoxime (CPDX) against 337 clinical isolates of Streptococcus pneumoniae isolated from Japanese hospital from 1997 to 2002 were investigated by agar plate method. The incidence of penicillin-susceptible S. pneumoniae (PSSP), penicillin-intermediate resistant S. pneumoniae (PISP), and penicillin-resistant S. pneumoniae (PRSP) in each year was studied, and the MICs of antibacterial agents against these strains were determined. As the results, the total incidence of PSSP, PISP, and PRSP was 51.0%, 40.4% and 8.6%, respectively. The incidences of PSSP from 1997 to 2002 were 46.0-55.9%, and were almost definite in each year. In quinolone antibiotics, the differences of antibacterial activity among TFLX, SPFX, and GFLX against PSSP, PISP, and PRSP, were not observed, and these 3 quinolones had potent antibacterial activity. Although CPFX and LVFX showed antibacterial activity as well as other quinolones by 2001, the CPFX-resistant or LVFX-intermediate resistant strains of PSSP were seen with 56.5% and 91.3% in 2002, respectively. Thirty percents of each PSSP, PISP, and PRSP strains were AZM-resistant strains. Such tendency of increase was recognized in PSSP. Against cephem antibiotics, the incidence of intermediate resistant and resistant strains was higher for PISP and PRSP than for PSSP. No difference in the incidence of resistant strains was noted among CFTM, CFDN, and CPDX.

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The effect of serum on the bactericidal activity of cefdinir, and the ability of the antibiotic to modify the interaction of bacteria with human polymorphonuclear neutrophils were assessed. In the presence of antibiotic, serum-resistant Escherichia coli were sensitised to the bactericidal activity of normal human serum. Cefdinir enhanced opsonophagocytic killing of Escherichia coli and Staphylococcus aureus at suprainhibitory concentrations. Significant potentiation of killing occurred with the combination of inhibitory concentrations of cefdinir, neutrophils and sub-optimal levels of serum opsonins. Pre-exposure of Escherichia coli, but not Staphylococcus aureus, to cefdinir enhanced phagocytic uptake and killing of the antibiotic-damaged bacteria. These results indicate that cefdinir-mediated phenotypic modification of Escherichia coli renders the bacteria susceptible to serum antibacterial activity and phagocytic uptake and intracellular killing.

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Two dosage regimens of cefdinir were compared with amoxicillin/clavulanate for the treatment of suppurative acute otitis media (AOM) in children.

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Presumptive eradication of middle ear pathogens determined by clinical cure of signs and symptoms of AOM at end of therapy (Study Days 7 to 9) and Visit 3 (Study Days 16 to 21).

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omnicef antibiotic 2016-01-20

Cefdinir (CFDN), a newly developed oral cephalosporin in 5% fine granular form, was administered to 10 boys at 1 hour before meal (in the fasting state) and concentrations of the drug in plasma and urine and its urinary recovery rates were determined. The subjects were divided into 2 groups of 5 boys each; one group received 3 mg/kg of CFDN, and the other, 6 mg/kg. To 6 of the 10 children the drug was administered in the two different dose levels using the cross-over method. To study clinical and bacteriological effects of this drug, a mean dose of 4.6 mg/kg t.i.d. was administered for 8 days on the average to 40 children with various infections; pharyngitis (4 cases), tonsillitis (2), acute bronchitis (2), pneumonia (8), scarlet fever (6), acute purulent otitis media (1), urinary tract infection (12), impetigo (2), phlegmon (1), lymphadenitis (1) and subcutaneous abscess (1). MICs were determined for 6 drugs including CFDN, cefaclor, cefixime (CFIX), methicillin, cloxacillin (MCIPC), amoxicillin (AMPC) against 13 strains of 6 species freshly isolated from children receiving CFDN. An inoculum size of 10(6) cfu/ml was used in the MIC-determinations. Adverse reactions and abnormal laboratory findings attributable to this drug were also examined in these patients. The results obtained are summarized as follows. 1. Mean plasma peak levels of CFDN were observed at 3 hours after administration in both the 3 mg/kg and 6 mg/kg groups with mean peak values of 0.68 and 1.35 micrograms/ml, respectively. Mean half-lives were 2.06 hours in the 3 mg/kg group and 1.61 hours in the 6 mg/kg group, and mean AUCs were 3.5 in the former and 6.5 in the latter. Thus, dose-response between the 2 doses Duricef Sinus Infection was observed in plasma levels and AUCs. 2. To 3 patients, CFDN was given in the two different doses using the cross-over method. Mean plasma peak levels of CFDN were 0.71 and 1.31 micrograms/ml in the doses of 3 mg/kg and 6 mg/kg, respectively. Half-lives were 1.39-2.90 hours in the 3 mg/kg group and 1.21-1.48 hours in the 6 mg/kg group, with AUCs of 3.4-3.7 and 4.1-7.5, respectively.(ABSTRACT TRUNCATED AT 400 WORDS)

omnicef dosage chart 2016-06-25

10 days of amoxicillin/clavulanic acid high dose and 5 days of cefdinir have been the preferred first- or second-line antibiotics for treatment of children with acute otitis media (AOM) since 2004, as recommended by the American Academy of Pediatrics in the USA, but no head Co Amoxiclav Generic Name And Brand Name -to-head comparison study has been done.

omnicef pills 2017-03-04

An investigator-blinded, randomized, multicenter study was conducted to compare the efficacy and safety of cefdinir and amoxicillin/ clavulanate (amoxicillin/CA) in the treatment of pediatric patients with acute suppurative otitis media. Patients 6 months to 12 years of age were randomized in a 1:1:1 ratio to receive cefdinir 14 mg/kg once-daily, cefdinir 7 mg/kg b.i.d., or amoxicillin/CA 13.3 mg/kg t.i.d. Test-of-cure was determined 11 to 16 days posttherapy. Of the 752 patients who entered the study, 665 (88%) completed treatment and 595 (79%) were evaluable. Response rates in the three treatment groups were similar. Overall rates of adverse events were statistically lower in the cefdinir once-daily group than in the amoxicillin/CA group. Diarrhea was the most common adverse event in all treatment groups. Cefdinir given either once-daily or twice-daily is a safe and effective treatment for pediatric patients with Azithromycin 500 Mg Dosing acute suppurative otitis media.

omnicef peds dosage 2017-10-16

We investigated the susceptibility to antibacterials of 194 strains of Haemophilus influenzae isolated from medical facilities in Gifu prefecture between 2005 and 2006, and compared these results with those of 280 strains of H. influenzae isolated between 1999 and 2000. Additionally, the strains that had been separated between 2005 and 2006 were examined for beta-lactamase (BL) production, the mutation of ftsI gene coding for PBP3, the bla gene coding for TEM type of BL and the serotype. Referring to the CLSI breakpoint, H. influenzae strains were classified into the following categories: (1) beta-lactamase-negative ampicillin-susceptible (BLNAS) strains, which showed BL negative, ampicillin (ABPC) and ampicillin/sulbactam (ABPC/SBT)-MIC < or = microg/ml, (2) beta-lactamase producing ampicillin-resistant (BLPAR) strains, which showed BL producing and ABPC/SBT-MIC < or =2 microg/ml, (3) beta-lactamase-negative ampicillin-resistant (BLNAR) strains, which showed BL negative, ABPC and ABPC/SBT-MIC > or =2 microg/ml, (4) beta-lactamase-producing amoxicillin/clavulanic acid-resistant (BLPACR) strains, which showed BL producing and ABPC/SBT-MIC > or =4 microg/ml. The prevalence of each resistance class were 71.8% for BLNAS, 7.9% for BLPAR, 19.6% for BLNAR and 0.7% for BLPACR in strains isolated between 1999 and 2000. But they were 38.1% for BLNAS, 4.6% for BLPAR, 54.6% for BLNAR and 2.6% for BLPACR in strains isolated between 2005 and 2006, indicating that the percentage of BLNAS and BLPAR decreased and that of BLNAR and BLPACR increased from 1999-2000 to 2005-2006. On the basis of ftsI substitutions and having bla gene, the strains isolated between 2005 and 2006 were classified into the following distribution: 24.2% for gBLNAS, 4.1% for gBLPAR, 10. Birodogyl And Alcohol 8% for gLow-BLNAR, 57.7% for gBLNAR, and 3.1% for gBLPACR-II. Ratio of BLNAR belonging to gBLNAR and gLow-BLNAR based on the ftsI substitutions and having bla gene was higher than that based on the susceptibility pattern. The MIC50 and MIC90 for those strains isolated between 2005 and 2006 were as follows; 0.0039, 0.0156 microg/ml for garenoxacin, 0.0078, 0.0156 microg/ml for tosufloxacin and ciprofloxacin, 0.0156, 0.0313 microg/ml for levofloxacin, 0.0313, 0.0625 microg/ml for norfloxacin, 0.0625, 0.25 microg/ml for piperacillin/ tazobactam, 0.0625, 0.5 microg/ml for piperacillin, 0.125, 0.25 microg/ml for ceftriaxone and cefditoren, 0.5, 1 microg/ml for cefteram, chloramphenicol and tetracycline, 0.5, 2 microg/ml for cefotaxime, 2, 8 microg/ml for ampicillin, ampicillin/sulbactam and cefdinir. In comparison with the values for the strains isolated between 1999 and 2000, the MIC50s of beta-lactam for the strains isolated between 2005 and 2006 increased over 4 times.

omnicef pediatric dosing sinusitis 2016-05-24

Time-kill experiments showed that while SP-A never modified the activity of antimicrobials, phospholipids exerted, in some cases, a weak antagonistic effect. Among antibacterials Tetracycline Family Of Antibiotics and pathogens investigated, phospholipids were able to decrease the rate of killing of cefepime and ciprofloxacin only on P. aeruginosa, both at 0.5 and at 2 MIC, with an increase of about 1 log in CFU. The combination of SP-A and phospholipids never modified the effect observed in the presence of lipids alone.

omnicef o tablet 2017-03-31

Antimicrobial efficacy is measured in vitro by determination of minimum inhibitory concentrations (MICs) and minimum bactericidal concentrations (MBCs) of antimicrobials, but these values do not account for fluctuations of drug concentrations within the body or the time course of the drug's in vivo antibacterial activity. However Cefuroxime Axetil Tablets 250 Mg Spc , in vivo bacteriologic efficacy can be predicted by pharmacokinetic/pharmacodynamic (PK/PD) parameters, such as the time for which the serum drug concentration is above the MIC (T>MIC), the ratio of peak serum concentration to the MIC, and the ratio of the area under the 24-h serum concentration-time curve to the MIC (AUC/MIC). Different patterns of antibacterial activity correlate with different PK/PD parameters. For example, a T>MIC of 40-50% of the dosing interval is a good predictor of bacteriologic efficacy for penicillins, cephalosporins, and most macrolides, and an AUC/MIC ratio of at least 25 is required for efficacy with fluoroquinolones and azalides. The PK/PD breakpoint for susceptibility of an organism to a specific dosing regimen of an agent can be determined as the highest MIC met by the relevant PK/PD parameter for bacteriologic efficacy for that agent. These parameters have been validated extensively in animal models, as well as in many human studies where bacteriologic outcome has been determined. The PK/PD breakpoint of an agent is determined primarily by the dosing regimen, and generally applies to all pathogens causing disease at sites where extracellular tissue levels are similar to non-protein-bound serum levels. On this basis, many parenteral beta-lactams are active against almost all strains of Streptococcus pneumoniae, including 'penicillin-non-susceptible' strains, in all body sites except for the central nervous system. Application of PK/PD breakpoints to standard dosing regimens of oral beta-lactams predicts that agents such as cefaclor and cefixime will have efficacy only against penicillin-susceptible strains of S. pneumoniae, while cefuroxime axetil, cefpodoxime and cefdinir will be effective against all penicillin-susceptible as well as many penicillin-intermediate strains. However, the most active oral beta-lactams, amoxicillin and amoxicillin-clavulanate, have predicted efficacy against all penicillin-susceptible and -intermediate pneumococci, as well as against most penicillin-resistant strains, at amoxicillin doses of 45-90 mg/kg per day in children and 1.75-4.0 g/day in adults. These predictions are supported by evidence from animal studies of bacteriologic efficacy. The use of PK/PD parameters to predict bacterial eradication therefore allows an evidence-based approach to the selection of appropriate antimicrobial therapy.

omnicef o tab 2016-08-02

The synthesis, antibacterial activity and oral absorption of the 7 beta-[(Z)-2-aryl-2-hydroxyiminoacetamido]-3-vinylcephalosporins (Ia--e Pediazole Antibiotic Dose Peds ) are described. All of these compounds exhibited excellent activity against Staphylococcus aureus. Against Gram-negative bacteria FK482 exhibited more excellent activity than the other compounds (Ia--e). These compounds except Ie showed good oral absorption. The relationship between the oral absorption rates and the lipophilicity of these cephalosporins is discussed.

omnicef brand name 2015-01-15

This study evaluated the effect of prophylactic cefdinir (3 mg/kg given once daily) for the prevention of recurrent and complicated urinary tract infections ( Levaquin Positive Drug Test UTI) in pediatric patients.

omnicef r capsulas 300 mg 2015-05-15

Surveillance studies conducted in the United States over the last decade have revealed increasing resistance among community-acquired respiratory pathogens, especially Streptococcus pneumoniae, that may limit future options for empirical therapy. The objective of this study was to assess the scope and magnitude of the problem at the national and regional levels during the 2005-2006 respiratory season (the season when community-acquired respiratory pathogens are prevalent) in the United States. Also, since faropenem is an oral penem being developed for the treatment of community-acquired respiratory tract infections, another study objective was to provide baseline data to benchmark changes in the susceptibility of U.S. respiratory pathogens to the drug in the future. The in vitro activities of faropenem and other agents were determined against 1,543 S. pneumoniae isolates, 978 Haemophilus influenzae isolates, and 489 Clavipen Tabletas De 500 Mg Moraxella catarrhalis isolates collected from 104 U.S. laboratories across six geographic regions during the 2005-2006 respiratory season. Among S. pneumoniae isolates, the rates of resistance to penicillin, amoxicillin-clavulanate, and cefdinir were 16, 6.4, and 19.2%, respectively. The least effective agents were trimethoprim-sulfamethoxazole (SXT) and azithromycin, with resistance rates of 23.5 and 34%, respectively. Penicillin resistance rates for S. pneumoniae varied by region (from 8.7 to 22.5%), as did multidrug resistance rates for S. pneumoniae (from 8.8 to 24.9%). Resistance to beta-lactams, azithromycin, and SXT was higher among S. pneumoniae isolates from children than those from adults. beta-Lactamase production rates among H. influenzae and M. catarrhalis isolates were 27.4 and 91.6%, respectively. Faropenem MICs at which 90% of isolates are inhibited were 0.5 mug/ml for S. pneumoniae, 1 mug/ml for H. influenzae, and 0.5 mug/ml for M. catarrhalis, suggesting that faropenem shows promise as a treatment option for respiratory infections caused by contemporary resistant phenotypes.