Sunday, February 18, 2018

FRAMYCETIN- Aminoglycoside Antibiotic

                                                  
DESCRIPTION-
Framycetin is an antibiotic of the aminoglycoside class similar to neomycin. Like neomycin, it has poor systemic absorption. It is used in topical preparations for infections of the skin, nose, ears, and eyes, often in combination with other antibacterial drugs and corticosteroids. It can also be used for gastrointestinal infections

Framycetin is used for the treatment of bacterial eye infections such as conjunctivitis. Framycetin is an antibiotic. It is not active against fungi, viruses and most kinds of anaerobic bacteria. Framycetin works by binding to the bacterial 30S ribosomal subunit, causing misreading of t-RNA, leaving the bacterium unable to synthesize proteins vital to its growth. Framycetin is useful primarily in infections involving aerobic bacteria

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.

HALF LIFE – 2-3 HOURS

USES
EAR INFECTION
EYE INFECTION
TRAUMATIC INJURY
SKIN DISORDER
GI INFECTION

ADR -  
* Itching
*Burning sensation
*Stinging
*Pruritis

DOSAGE-
Ophthalmic
Conjunctivitis, blepharitis and blepharoconjunctivitis
Adult: As 0.5% ointment. Apply 2-3 times daily into the affected eyes.

DRUG INTERACTION-
* FRAMYCETIN + AMPHOTERICIN B   - Amphotericin B may increase the nephrotoxic activities of   Framycetin

*FRAMYCETIN + AVIBACTAM - Avibactam may increase the nephrotoxic activities of Framycetin
*FRAMYCETIN+ Cefaclor   -   Cefaclor may increase the nephrotoxic activities of Framycetin.
*FRAMYCETIN + Rocuronium - Framycetin may increase the activities of Rocuronium

REFERENCE-
Tripathi K.D,"Essentials of medical pharmacology",7th edition,page no- 750.

1 comment:

  1. Potent and selective antagonist of bradykinin b1 receptor (pa2 = 8.49), which displays no activity at b2 receptors, and reduces mechanical hypernociception in a mouse model of neuropathic pain. R 715

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