Dewroxim O

Uses

Cefpodoxime is used for the treatment of patients infected with susceptible strains of micro-organisms which include a wide range of gram-positive & gram-negative bacteria. As it is highly stable in presence of b-lactamase enzyme, so it is more effective against gram-positive bacteria than other 3rd generation oral Cephalosporins.

The susceptible organisms include gram-positive bacteria eg. S. aureus (including penicillinase producing strains), S. saprophyticus, S. pneumoniae, S. pyogenes, S. agalactiae, P. magnus and gram-negative bacteria eg. E. coli, K. pneumoniae, H. influenzae (including b-lactamase producer & Ampicillin resistant strains), M. catarrhalis, N. gonorrhoeae (including penicillinase producing strains), P. mirabillis, C. diversus, H. parainfluenzae, K. oxytoca, P. vulgaris, P. rettgeri.

Ximeprox is used for the following diseases:-

(1) Lower respiratory tract infection: Acute community-acquired pneumonia, Acute bacterial exacerbation of chronic bronchitis; (2) Upper respiratory tract infection: Acute otitis media, Acute maxillary sinusitis, Pharyngitis, Tonsillitis; (3) Sexually transmitted diseases: Acute uncomplicated urethral & cervical gonorrhea, Acute ano-rectal infection in woman caused by N. gonorrhoeae; (4) Uncomplicated urinary tract infection: Cystitis, Pyuria; (5) Skin & soft tissue infections: Furuncle, Cellulitis, Subcutaneous abscess, infectious atheroma & periproctal abscess (6) Enteric fever.

Ofloxacin Eye: It is used for the treatment of external ocular infections such as acute & sub-acute conjunctivitis, keratitis, kerato-conjunctivitis, blepharo-conjunctivitis, blepharitis, corneal ulcer and pre-operative prophylaxis in ocular surgery.

Ofloxacin Ear: It is used for the treatment of external ear infections (otitis externa) and certain middle ear infections (otitis media).

Ofloxacin Oral/Injection are used for the treatment of adults with mild to moderate infections caused by susceptible strains.

• Lower Respiratory Tract: Acute bacterial exacerbation of chronic bronchitis lung abscess, pneumonia.
• Gastrointestinal Tract: Enteric fever, shigellosis.
• Multi-drug-resistant Tuberculosis.
• Skin and skin structures: Uncomplicated skin and skin structure infections.
• Sexually Transmitted Diseases: Acute, Uncomplicated urethral and cervical gonorrhoea. Nongonococcal urethritis and cervicitis. Mixed infections of the urethra and cervix.
• Urinary tract: Uncomplicated Urinary Tract Infections, Complicated urinary tract infections.

Dewroxim O is also used to associated treatment for these conditions: Acute Bacterial Exacerbation of Chronic Bronchitis (ABECB), Acute Otitis Media, Acute Sinusitis, Acute Tracheobronchitis, Acute maxillary sinusitis, Bacterial Infections, Bacterial Pneumonia, Community Acquired Pneumonia (CAP), Gonorrhea, Lower Respiratory Tract Infection (LRTI), Otitis Media (OM), Pharyngitis, Skin and Soft Tissue Infections, Streptococcal Pharyngitis, Streptococcal tonsillitis, Superinfection bacterial, Tonsillitis, Uncomplicated Urinary Tract Infections, Upper Respiratory Tract Infection, Uncomplicated Lower Respiratory Tract Infection (LRTI), Uncomplicated Upper Respiratory Tract Infection, Uncomplicated Urethritis gonococcal, Uncomplicated skin and subcutaneous tissue bacterial infectionsAcute Bacterial Exacerbation of Chronic Bronchitis (ABECB), Acute Otitis Media, Bacterial Infections, Cervicitis, Community Acquired Pneumonia (CAP), Complicated Urinary Tract Infection, Conjunctivitis, Epididymitis, Hansen's Disease, Nongonococcal urethritis, Otitis Externa, Prostatitis, Skin and Subcutaneous Tissue Bacterial Infections, Spontaneous Bacterial Peritonitis (SBP), Traveler's Diarrhea, Ulcerative keratitis, Acute Pelvic inflammatory disease, Acute, uncomplicated Gonorrhea, Chronic suppurative Otitis media, Uncomplicated Cystitis

How Dewroxim O works

Cefpodoxime is active against a wide spectrum of Gram-positive and Gram-negative bacteria. Cefpodoxime is stable in the presence of beta-lactamase enzymes. As a result, many organisms resistant to penicillins and cephalosporins, due to their production of beta-lactamase, may be susceptible to cefpodoxime. Cefpodoxime is inactivated by certain extended spectrum beta-lactamases. The bactericidal activity of cefpodoxime results from its inhibition of cell wall synthesis. The active metabolite of cefpodoxime binds preferentially to penicillin binding protein 3, which inhibits production of peptidoglycan, the primary constituent of bacterial cell walls.

Ofloxacin acts on DNA gyrase and toposiomerase IV, enzymes which, like human topoisomerase, prevents the excessive supercoiling of DNA during replication or transcription. By inhibiting their function, the drug thereby inhibits normal cell division.

Dosage

Dewroxim O dosage

Ximeprox should be administered orally with food to enhance absorption. Ximeprox suspension may be given without regard to food.

Child :

15 days - 6 months : 4 mg/kg every 12 hours

6 months - 2 years : 40 mg every 12 hours

3 - 8 years : 80 mg every 12 hours

over 9 years : 100 mg every 12 hours

Patients with renal dysfunction: For patients with severe renal impairment (creatinine clearance <30 ml/min) the dosing intervals should be increased to 24 hourly.

Patients with liver cirrhosis: Cefpodoxime proxetil pharmacokinetics in cirrhotic patients are similar to those in healthy subjects. Dose adjustment is not necessary in this population.

Ofloxacin Eye: Instill 1 drop in the affected eye(s) every 2 to 4 hours for the first two days and then 4 times daily. The length of treatment should not exceed ten days.

Ofloxacin Ear: Instill 1-2 drops in the affected ear(s) twice daily or as needed.

Ofloxacin Intravenous (Adult):

• Skin and soft tissue infections: 400 mg bid infused over at least 1 hr.
• Complicated urinary tract infections: 200 mg daily by infusion over at least 30 min. Max: 400 mg bid infused over at least 1 hr.
• Lower respiratory tract infections, Septicaemia: 200 mg bid by infusion over at least 30 min. Max: 400 mg bid infused over at least 1 hr.

Ofloxacin Oral (Adult):

General dosage recommendations: The dose of ofloxacin is determined by the type and severity of the infection. The dosage range for adults is 200 mg to 800 mg daily. Up to 400 mg may be given as a single dose, preferably in the morning, larger doses should be given as two divided doses. Ofloxacin tablets should be swallowed with liquid; they should not be taken within two hours of intake of magnesium/aluminium containing antacids or iron preparations since reduction of absorption of ofloxacin can occur.

• Enteric fever: For adults 200 mg, every 12 hours, for 5 days. For children 15 mg/kg/day in 2 divided doses for 3 days.
• Shigellosis: 400 mg single dose.
• Multi-drug-resistant tuberculosis: 400 mg twice daily along with conventional anti-tuberculosis drugs.
• Lower respiratory tract infection: 400 mg daily, increasing, if necessary, to 400 mg twice daily.
• Uncomplicated Urinary Tract Infections: A single dose of 200/400 mg.
• Uncomplicated urethral and cervical gonorrhoea: A single dose of 400 mg.
• Non-gonococcal urethral and cervicitis: 400 mg daily in single or divided doses.
• Complicated Urinary Tract Infection: 200/400 mg/day for 7 days.

Children: Ofloxacin is usually not indicated for use in children or growing adolescents.

Elderly: No adjustment of dosage is required in the elderly.

Direction for Reconstitution of suspension:

For 100 ml suspension : Add 50 ml (10 measuring spoonful) of boiled and cooled water to the dry mixture in the bottle. For ease of preparation add water to the bottle in two portions. Shake well after each addition until all the powder is in suspension.

For 50 ml suspension : Add 25 ml (5 measuring spoonful) of boiled and cooled water to the dry mixture in the bottle. For ease of preparation add water to the bottle in two portions. Shake well after each addition until all the powder is in suspension.

For 50 ml DS suspension : Add 25 ml (5 measuring spoonful) of boiled and cooled water to the dry mixture in the bottle. For ease of preparation add water to the bottle in two portions. Shake well after each addition until all the powder is in suspension.

Note: Shake the suspension well before each use. Keep the bottle tightly closed. The reconstituted suspension should be stored in a cool and dry place, preferably in refrigerator and unused portion should be discarded after 10 days.

May be taken with or without food. Avoid antacids or supplements containing Fe or Zn within 2 hr before or after ofloxacin. Ensure adequate hydration.

Side Effects

Cefpodoxime has very few side effects. The side effects include diarrhea, nausea, skin & vaginal fungal infection, abdominal pain, headache, chest pain, myalgia, dyspepsia, dizziness, vertigo, cough etc. In children incidence of fungal skin rash is more than adults.

Ofloxacin Eye: Transient ocular irritation, burning, stinging, redness, itching or photophobia have been reported.

Ofloxacin Ear: Mild irritation or mild discomfort in the ear may occur. Symptoms of an allergic reaction include rash, itching, swelling or trouble breathing.

Ofloxacin tablet or injection is generally well tolerated and clinical side-effects of ofloxacin has been quite low. Among the adverse effects gastrointestinal and central nervous systems' reactions are common. Nausea, rash, vomiting, abdominal pain, diarrhoea and gastrointestinal distress are the gastrointestinal adverse effects. Common central nervous system reactions are headache, dizziness and insomnia.

Toxicity

LD₅₀=5450 mg/kg (orally in mice)

Precaution

In patients with transient or persistent reduction in urinary output due to renal insufficiency, the total daily dose of cefpodoxime proxetil should be reduced. Cefpodoxime, like other cephalosporins, should be administered with caution to patients receiving concurrent treatment with potent diuretics. As with other broad spectrum antibiotics, prolonged use of cefpodoxime proxetil may result in overgrowth of non-susceptible organisms. Repeated evaluation of the patient's condition is essential.

Patients being treated with Ofloxacin should not expose themselves unnecessarily to strong sunlight and should avoid UV rays. Caution is recommended if the drug is to be used in psychotic patients or in-patients with a history of psychiatric disease.

Prolonged use of eye drops & ear drops may result in overgrowth of non-susceptible organisms and secondary infection respectively.

Interaction

Antacids or H2-blockers may decrease the absorption of cefpodoxime. Reduced renal excretion with probenecid.

Antacids containing magnesium, aluminium or calcium may decrease absorption of ofloxacin. Iron or Zinc may decrease oral absorption of ofloxacin.

Elimination Route

Cefpodoxime proxetil is a prodrug that is absorbed from the gastrointestinal tract and de-esterified to its active metabolite, cefpodoxime. Following oral administration of 100 mg of cefpodoxime proxetil to fasting subjects, approximately 50% of the administered cefpodoxime dose was absorbed systemically.

Bioavailability of ofloxacin in the tablet formulation is approximately 98%

Half Life

2.09 to 2.84 hours

9 hours

Elimination Route

Over the recommended dosing range (100 to 400 mg), approximately 29 to 33% of the administered cefpodoxime dose was excreted unchanged in the urine in 12 hours.

Ofloxacin is mainly eliminated by renal excretion, where between 65% and 80% of an administered oral dose of ofloxacin is excreted unchanged via urine within 48 hours of dosing. About 4-8% of an ofloxacin dose is excreted in the feces and the drug is minimally subject to biliary excretion.

Pregnancy & Breastfeeding use

There are no adequate and well-controlled studies on Cefpodoxime proxetil use in pregnant woman, but it was found neither teratogenic nor embryocidal in animal trial. However, the drug should be used during pregnancy only if clearly needed. In nursing mother, Cefpodoxime is excreted in breast milk & there is potential risk of serious reactions in nursing infants, so a decision should be made whether to discontinue breast feeding or to discontinue the drug.

Use in pregnancy: There are no adequate and well-controlled studies in pregnant women. This drug should be used during pregnancy only if the potential benefit justifies the potential risk to the fetus.

Use in lactation: It is not known whether Ofloxacin is excreted in human milk. Cautions should be taken when Ofloxacin eye & ear drops is administered during lactation.

Contraindication

Cefpodoxime is contraindicated in patients with known allergy to the cephalosporin class of antibiotics.

Renal Impairment: Patients with renal dysfunction: For patients with severe renal impairment (creatinine clearance <30 ml/min) the dosing intervals should be increased to 24 hourly.

Hepatic Impairment: The dosage does not require modification in cases of hepatic impairment.

It is contraindicated in patients who are hypersensitive to Ofloxacin or any other component of Ofloxacin (Eye/Ear Drops).

Ofloxacin tablet injection should not be used in-patients with known hypersensitivity to 4-fluoroquinolone antibacterials. It is contraindicated in-patients with a history of epilepsy or with a lowered seizure threshold. Ofloxacin is usually contraindicated in children or growing adolescents and in pregnant or breast feeding women.

Special Warning

Renal Impairment:

• CrCl <20 and patients on haemodialysis or peritoneal dialysis: 100 mg 24 hrly following usual initial dose.
• CrCl 20-50: Reduce dose by half 24 hrly following usual initial dose.

Hepatic Impairment:Severe: Reduce dose. Max: 400 mg daily

Acute Overdose

Symptoms: Nausea, vomiting, epigastric distress and diarrhoea.

Management: Haemodialysis or peritoneal dialysis may be useful in the event of a serious toxic reaction particularly if renal function is compromised.

Symptoms: Confusion, dizziness, impairment of consciousness, convulsive seizures, GI reactions (e.g. nausea, mucosal erosions).

Management: Symptomatic and supportive treatment. Remove any unabsorbed drug by gastric lavage or admin of adsorbants and Na sulfate. Antacids are recommended for protection of gastric mucosa. Elimination may be increased by forced diuresis.

Storage Condition

Capsule: Store below 30° C, protected from light and moisture.

Powder for suspension: Store below 25° C, protected from light and moisture.

After reconstitution: The suspension can be used within 7 days if be kept at room temperature and within 14 days if be kept in refrigerator (2° to 8° C). Always keep the bottle tightly closed.

Store between 15-30° C. Protect from light.

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