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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

The most common side effects associated with Omnicef are:

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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 drug interactions

Cefdinir, a so-called third-generation oral cephalosporin was tested in vitro against over 700 pathogens from patients with bacteremia. Cefdinir was very active against the Enterobacteriaceae with a 50% minimum inhibitory concentration (MIC50) value range of less than or equal to 0.03-8 micrograms/ml. The enteric species having the highest MIC90S (greater than or equal to 16 micrograms/ml) were Citrobacter freundii, and the enterobacters, Morganella morganii, Proteus vulgaris, and Serratia marcescens. Cefdinir was generally two- to fourfold less active than cefixime, but markedly more potent with a wider spectrum compared with older oral cephalosporins, cefaclor or cefuroxime. In contrast to cefixime, cefdinir inhibited Staphylococcus aureus (MIC90, 1 micrograms/ml) and other staphylococci. Pneumococci, beta-hemolytic streptococci, Haemophilus influenzae, Moraxella catarrhalis, and pathogenic Neisseria spp. (MIC90S, 0.12-0.5 micrograms/ml) were cefdinir susceptible, but Pseudomonas aeruginosa, oxacillin-resistant staphylococci and Bacteroides fragilis gr. strains were resistant. Cefdinir was generally bactericidal with a minimal inoculum effect at 10(6) colony-forming units per spot. Cefdinir beta-lactamase hydrolysis by some recently described extended broad spectrum beta-lactamases was suspected. Cefdinir exhibited a wide, balanced spectrum for an oral cephalosporin indicating possible clinical use against susceptible pathogens in respiratory tract, urinary tract, genital and cutaneous infections.

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The therapeutic use of oral cephalosporins to treat infectious diseases continues to challenge clinicians; many attempts have been made over recent years to improve the efficacy and spectrum of these anti-infectives. Many oral cephalosporins are in development and include cefdinir, cefprozil, cefetamet pivoxil, cefcapene pivoxil, cefcanel daloxate hydrochloride in Phase II trials, S-1090 in Phase III trials and the novel compounds E1100, E1101 and BRL-57347. Differences between these drugs are sometimes subtle and the improvement over existing compounds modest, although recent cephalosporins have shown greater activity against Gram-negative bacterial infections. A better knowledge of the pharmacodynamic and pharmacokinetic interrelationships of existing oral cephalosporins is demanded for a more rational use of these compounds and to avoid the subsequent development of resistance. Perhaps with such an approach, the perceived need for new cephalosporins will diminish.

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In this study, the pharmacokinetics of cefdinir were investigated after L-phenylalanine supplementation and a high-protein diet (HPD) in humans to explore changes in the activities of intestinal and renal oligopeptide transporters.

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The final analysis included 1033 patients: 530 (51%) before the CPG (pre-CPG) and 503 (49%) after the CPG (post-CPG). Pre-CPG, ceftriaxone (72%) was the most commonly prescribed antibiotic, followed by ampicillin (13%). Post-CPG, the most common antibiotic was ampicillin (63%). The effect of the CPG was associated with a 34% increase in ampicillin use (P < .001). Discharge antibiotics also changed post-CPG, showing a significant increase in amoxicillin use (P < .001) and a significant decrease in cefdinir and amoxicillin/clavulanate (P < .001), with the combined effect of the CPG and ASP leading to 12% (P < 0.001) and 16% (P < .001) reduction, respectively. Overall, treatment failure was infrequent (1.5% vs 1%).

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Three unknown impurities in Cefdinir bulk drug at levels below 0.2% (ranging from 0.05 to 0.2%) have been detected by high performance liquid chromatography (HPLC). These impurities were isolated from crude sample of Cefdinir using preparative HPLC. Based on the spectral data (NMR, IR and MS) the structures of these impurities were characterized as (6R, 7R)-7-[(z)-2-(2-aminothiazol-4-yl)-2-hydroxyiminoacetamido]-8-oxo-3-vinyl-5-thia-1-azabicyclo [4.2.0] oct-2-ene-2-carboxylic acid-5-oxide (I). (6R, 7R)-7-[(z)-2-(2-aminothiazol-4-yl)-2-hydroxyiminoacetamido]-8-oxo-3-vinyl-5-thia-1-azabi-cyclo [4.2.0] oct-3-ene-2-carboxylic acid (II). (6R, 7R)-7-[(z)-2-(2-aminothiazol-4-yl)-2-hydroxyiminoacetamido]-8-oxo-3-methyl-5-thia-1-azabicyclo-[4.2.0]oct-2-ene-2-carboxylic acid (III), respectively. The origin and structural elucidation of all impurities have been discussed.

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The synthesis of 7 beta-[(Z)-2-(aminothiazol-4-yl)-2-hydroxyiminoacetamido] cephalosporins (Ia-i) modified at the C-3 position of a cephem nucleus and the effect of the C-3 substituents on the antibacterial activity and oral absorbability are discussed. The cephems (Ie, h and i) having a C-3 substituent such as 1-propenyl, ethylthio and vinylthio group as well as FK482 (cefdinir) exhibited excellent antibacterial activities against both gram-positive and gram-negative bacteria. However, those compounds showed poor absorption rate after oral administration in rats. It is concluded that the vinyl moiety at the 3-position is necessary to display fairly oral absorptivity in a series of 7 beta-[(Z)-(2-aminothiazol-4-yl)-2-hydroxyiminoacetamido]c eph ems.

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A total of 113 patients were enrolled between August 2006 and April 2007, 104 cases of which were performed for bacteriological study. The incidence of bacterial growth was 60.6% (95% CI 51.0-69.4%). The most common bacteria was H. influenzae (25.0%, 95% CI 16.9-35.3%), followed by S. pneumoniae (14.3%, 95% CI 8.2-23.5%) and S. aureus (9.5%, 95% CI 4.7-17.9%), respectively, whilst M. catarrhalis was found only in 2.4% (95% CI 0.5-7.3%). Eight in 12 S. pneumoniae isolates were tested for the minimal inhibitory concentration of penicillin and found to be penicillin resistant strain in five specimens. Beta-lactamase producing H. influenzae was found in eight out of 20 isolates. H. influenzae had a tendency to be sensitive to amoxicillin/clavulanate, cefuroxime, cefpodoxime, azithromycin, clarithromycin, ofloxacin, levofloxacin and gatifloxacin, whilst S. pneumoniae had a tendency to be sensitive to amoxicillin/clavulanate, cefaclor ampicillin/sulbactam, cefuroxime, ofloxacin, levofloxacin, gatifloxacin, cefpodoxime, cefixime and cefdinir. The effectiveness of antibiotics prescription according to the Thai CPG of ABRS and antimicrobial sensitivity were comparable, 88.5% (95% CI 69.8-97.6%) and 82.2% (95% CI 67.9-92%), respectively.

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A sensitive and selective liquid chromatographic-tandem mass spectrometric (LC-MS/MS) method was developed for the determination of cefdinir in human plasma. After a simple protein precipitation using trichloracetic acid, the post-treatment samples were applied to a prepacked RP18 Waters SymmetryShield column interfaced with a triple quadrupole tandem mass spectrometer. Positive electrospray ionization was employed as the ionization source. The mobile phase consisted of methanol-water-formic acid (25:75:0.075, v/v/v). The analyte and I.S. cefaclor were both detected by the use of selected reaction monitoring mode. The method was linear in the concentration range of 5-2,000 ng/ml. The lower limit of quantification was 5 ng/ml. The intra- and inter-day relative standard deviation across three validation runs over the entire concentration range was less than 4.3%. The accuracy determined at three concentrations (36, 360 and 1,800 ng/ml for cefdinir) ranged from 99.6 to 106.7% in terms of recovery. The chromatographic run time for each plasma sample was less than 3 min. The method herein described was successfully applied for the evaluation of pharmacokinetic profiles of cefdinir capsule in 12 healthy volunteers.

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omnicef antibiotic and alcohol 2017-12-17

Vancomycin resistant and multi-drug-resistant enterococci are the major emerging pathogens in surgical Myclav Medicine , neonatal, and tertiary care units.

omnicef 100 mg 2015-06-21

Short-chain fatty acids (SCFAs), produced by anaerobic fermentation of mainly indigestible dietary carbohydrates by gut microbiota, have a profound influence on intestinal function and host energy metabolism. Antibiotics may seriously disturb the balance of fecal SCFAs. To Sulfa Drugs List Pdf evaluate the impacts of antibiotics on fecal SCFAs produced by gut microbiota, a simple, reproducible and accurate gas chromatography (GC) method, which can simultaneously analyze seven SCFAs in fecal samples, was developed and validated. The ranges of detection and quantitation of the SCFAs reached 0.0868 ~ 0.393 and 0.261 ~ 1.18 μg·mL-1 respectively, in an optimized protocol for SCFAs extraction and analysis that used 10 mL 75% ethanol aqueous solution containing 1% HCl, without ultrasonication. The technique exhibited excellent intra-day (relative standard deviation (RSD) ≤ 2.54%) and inter-day (RSD ≤ 4.33%) precisions for all the SCFAs. Later, we administered broad-spectrum antibiotics, cefdinir or azithromycin to rats and analyzed the alterations in fecal SCFAs. The total amount, types and distribution of nearly all fecal SCFAs were significantly altered during the administration and even after withdrawal of the antibiotics in rats. The effects of cefdinir on the SCFAs were more pronounced than those of azithromycin. Our findings suggest SCFAs may serve as sensitive indicators to monitor the influences of antibiotics on SCFAs originated by intestinal bacteria. Our improved SCFAs analysis method is a potential platform for a standard clinical test of the effects of new antibiotics on SCFAs.

omnicef o tab 2017-03-19

CS-834 is a novel oral carbapenem antibiotic. This compound is an ester-type prodrug of the active metabolite R-95867. The antibacterial activity of R-95867 was tested against 1,323 clinical isolates of 35 species and was compared with those of oral cephems, i.e., cefteram, cefpodoxime, cefdinir, and cefditoren, and that of a parenteral carbapenem, imipenem. R-95867 exhibited a broad spectrum of activity covering both gram-positive and - Septra Dose For Acne negative aerobes and anaerobes. Its activity was superior to those of the other compounds tested against most of the bacterial species tested. R-95867 showed potent antibacterial activity against clinically significant pathogens: methicillin-susceptible Staphylococcus aureus including ofloxacin-resistant strains, Streptococcus pneumoniae including penicillin-resistant strains, Clostridium perfringens, Neisseria spp., Moraxella catarrhalis, most members of the family Enterobacteriaceae, and Haemophilus influenzae (MIC at which 90% of strains are inhibited, < or =0.006 to 0.78 microg/ml). R-95867 was quite stable to hydrolysis by most of the beta-lactamases tested except the metallo-beta-lactamases from Stenotrophomonas maltophilia and Bacteroides fragilis. R-95867 showed potent bactericidal activity against S. aureus and Escherichia coli. Penicillin-binding proteins 1 and 4 of S. aureus and 1Bs, 2, 3, and 4 of E. coli had high affinities for R-95867. The in vivo efficacy of CS-834 was evaluated in murine systemic infections caused by 16 strains of gram-positive and -negative pathogens. The efficacy of CS-834 was in many cases superior to those of cefteram pivoxil, cefpodoxime proxetil, cefdinir, and cefditoren pivoxil, especially against infections caused by S. aureus, penicillin-resistant S. pneumoniae, E. coli, Citrobacter freundii, and Proteus vulgaris. Among the drugs tested, CS-834 showed the highest efficacy against experimental pneumonia in mice caused by penicillin-resistant S. pneumoniae.

omnicef dosage forms 2016-05-15

The voltammetric behavior of cefdinir has been studied in different surfactant media viz. anionic, neutral, and cationic surfactants over the pH range 2.5-12 in phosphate buffer (0.2 M). Addition of cationic surfactant (citrimide) Orelox Antibiotics Side Effects to the cefdinir containing electrolyte enhanced the reduction current signal while anionic surfactant (sodium lauryl) and neutral surfactant (Tween-20) showed an opposite effect. The reduction process was irreversible over the entire pH range studied (2.5-12). The mechanism of reduction has been postulated on the basis of controlled potential electrolysis, coulometry and spectral analysis. An analytical method with adequate precision and accuracy was developed for the determination of cefdinir in linear concentration range 2x10(-4)-1x10(-5) mol L(-1) with detection limit 0.3x10(-6) mol L(-1). The analysis of cefdinir in its pharmaceutical formulation resulted in mean recoveries of 99 and 98% for both the reduction peaks.

omnicef ear infection dosage 2017-03-07

All penicillin-susceptible Streptococcus pneumoniae (PSSP) strains were also susceptible to cefdinir and cefaclor. Both cefdinir and cefaclor were not active against penicillin-resistant SP (PRSP). Against penicillin Clindamax Gel Acne -intermediate SP (PISP) the susceptibility rates of cefdinir and cefaclor were 70.1% and 57.4%, respectively. The activity of cefdinir and cefaclor against beta-lactamases negative Hemophilus influenzae (HI) was excellent, but the susceptibility rates of cefdinir and cefaclor against beta-lactamases positive HI were 85.0% and 70.0%, respectively with MIC(90) of 1.5 mg/L vs. 256.0 mg/L. Cefdinir presented higher activities and lower MIC values than cefaclor against Moraxella catarrhalis (MC), Group A streptococcus (GAS), methicillin susceptible staphylococcus aureus (MSSA), and extended spectrum beta-lactamases (ESBLs) negative Escherichia coli (E. coli) or Klebsiella pneumoniae (K. pn). Both cefdinir and cefaclor were not susceptible to ESBLs positive E. coli and K. pn.

omnicef 150 mg 2017-12-03

A novel qualitative analytical method by using two Cefoprox Antibiotic -dimensional chromatographic correlation spectroscopy techniques for recognizing impurity peaks of HPLC methods of quality control and LC-MS chromatographic system was established. The structures of major degradation products of ceftizoxime and cefdinir were identified by LC-MS and MassWorks application; the standard chromatographic and spectral data of the degradation impurities were obtained by high-performance liquid chromatography with diode array detection. The impurity peaks of two-dimensional chromatography were matched by comparison of spectra and calculating correlation coefficients. Peaks in chromatography can be identified accurately and rapidly in different chromatographic systems such as column and mobile phase changed. The method provides a new way and thought to identify the peaks in quality control of impurities without reference impurity substances.

omnicef 300 mg price 2016-12-15

In a phase IV, investigator-blinded, parallel-group, randomized, multicenter study, parents or legal guardians were asked to complete the Otitis Parent Questionnaire (OPQ) 12-14 days after the first dose of cefdinir or amoxicillin/clavulanate oral suspensions Cepodem Xp 325 Tab . Responses in each of the outcome domains were analyzed using non-parametric statistical analysis.

omnicef capsules 2017-12-03

A Chloramphenicol 400 Mg total of 644 nasopharyngeal isolates of H. influenzae was collected from pediatric acute otitis media (AOM) patients with or without otitis media with effusions (OME) at the clinics of Otolaryngology-Head and Neck Surgery, Wakayama Medical University Hospital and six affiliated hospitals in Wakayama prefecture between January 1999 and December 2003. Minimal inhibitory concentrations (MICs) of ampicillin (AMP), cefditoren (CDN), cefdinir (CFD), cefaclor (CCL), cefpodoxime (CPD), and cefcapene (CFPN) were determined by the microbroth dilution method according to the recommendations of the National Committee for Clinical Laboratory Standards (NCCLS). Types of mutations in PBP3 gene (ftsI) were evaluated by a polymerase chain reaction (PCR)-based genotyping method. ss-Lactamase gene (bla) was also identified by PCR.

omnicef 300 antibiotics 2017-01-22

Studies were identified by a MEDLINE search (January 1983-September 2001) of the English-language medical literature, a review of identified articles and their bibliographies, and a review of data on file with the manufacturer. Clinical efficacy data were selected from Klavox Child Dose all published trials mentioning cefdinir. Information concerning in vitro susceptibility, safety, chemistry, and the pharmacokinetic profile of cefdinir also was reviewed.

omnicef pediatric dose 2016-11-13

In this study, 267 enterococci from different clinical and non-clinical samples of equine origin were tested for their antimicrobial drug sensitivity against 19 antimicrobials using disc diffusion method.

omnicef 600 mg 2015-08-18

The purpose of the study was to compare the clinical efficacy of amoxicillin/clavulanic acid high-dose therapy for 10 days with cefdinir therapy for 5 days for AOM at recommended doses.