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POLYDEXA EAR DROPS

Product Information

Registration Status: Active

SIN04945P

POLYDEXA EAR DROPS is approved to be sold in Singapore with effective from 1990-07-16. It is marketed by PHARMACON PTE LTD, with the registration number of SIN04945P.

This product contains Dexamethasone Sodium Metasulfobenzoate 0.1g/100ml,Neomycin 650000 iu/100ml, and Polymyxin B 1000000 iu/100ml in the form of SOLUTION. It is approved for AURICULAR (OTIC) use.

This product is manufactured by BOUCHARA-RECORDATI in FRANCE.

It is a Prescription Only Medicine that can only be obtained from a doctor or a dentist, or a pharmacist with a prescription from a Singapore-registered doctor or dentist.

Product Reference
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Source of information: Drugbank (External Link). Last updated on: 3rd July 18. *Trade Name used in the content below may not be the same as the HSA-registered product.


Description

A component of neomycin that is produced by Streptomyces fradiae. On hydrolysis it yields neamine and neobiosamine B. (From Merck Index, 11th ed)

Indication

For the treatment of bacterial blepharitis, bacterial bonjunctivitis, corneal injuries, corneal ulcers and meibomianitis. For the prophylaxis of ocular infections following foreign body removal

Mechanism of Action

Framycetin binds to specific 30S-subunit proteins and 16S rRNA, four nucleotides of 16S rRNA and a single amino acid of protein S12. This interferes with decoding site in the vicinity of nucleotide 1400 in 16S rRNA of 30S subunit. This region interacts with the wobble base in the anticodon of tRNA. This leads to interference with the initiation complex, misreading of mRNA so incorrect amino acids are inserted into the polypeptide leading to nonfunctional or toxic peptides and the breakup of polysomes into nonfunctional monosomes.

Active Ingredient/Synonyms

Fradiomycin B | Framicetina | Framycetin | Framycétine | Framycetinum | Neomycin B | Framycetin |


Source of information: Drugbank (External Link). Last updated on: 3rd July 18. *Trade Name used in the content below may not be the same as the HSA-registered product.


Description

Polymyxin B sulfate is a mixture of polymyxins B1 and B2, obtained from Bacillus polymyxa strains. They are basic polypeptides of about eight amino acids and have cationic detergent action on cell membranes. Polymyxin B is used for infections with gram-negative organisms, but may be neurotoxic and nephrotoxic. All gram-positive bacteria, fungi, and the gram-negative cocci, N. gonorrhea and N. menigitidis, are resistant. It is appropriate for treatment of infections of the urinary tract, meninges, and blood stream, caused by susceptible strains of Pseudomonas aeruginosa.

Indication

For treatment of infections of the urinary tract, meninges, and blood stream, caused by susceptible strains of Pseudomonas aeruginosa.

Mechanism of Action

Polymyxin B sulfate has a bactericidal action against almost all gram-negative bacilli except the Proteus group. Polymyxin B sulfate interacts with the lipopolysaccharide of the cytoplasmic outer membrane of Gram-negative bacteria, altering membrane permeability and causing cell death. It does not need to enter the cell.

Pharmacokinetics

Absorption
Not absorbed from the normal alimentary tract.
Distribution
Metabolism
Elimination

Toxicity

Overdose can cause stomach pains, vomiting, and diarrhea.

Active Ingredient/Synonyms

Polimixina B | Polymyxin B | Polymyxin B Sulphate | Polymyxin-B-Sulfat | Polymyxine B | Polymyxine B (sulfate de) | Polymyxini B sulfas | Polymyxinum B | Polymyxin B Sulfate |


Source of information: Drugbank (External Link). Last updated on: 3rd July 18. *Trade Name used in the content below may not be the same as the HSA-registered product.

References

  1. Health Science Authority of Singapore - Reclassified POM
  2. Drugbank

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