Overview
DESCRIPTION Colistimethate for Injection, USP is a sterile parenteral antibiotic product which, when reconstituted (see Reconstitution ), is suitable for intramuscular or intravenous administration. Each vial contains colistimethate sodium or pentasodium colistinmethanesulfonate (150 mg colistin base activity).
Mechanism of Action
CLINICAL PHARMACOLOGY Typical serum and urine levels following a single 150 mg dose of Colistimethate for Injection, USP IM or IV in normal adult subjects are shown in Figure 1. Figure 1: Typical serum and urine levels following a single 150 mg dose of Colistimethate for Injection, USP IM or IV in normal adult subjects Higher serum levels were obtained at 10 minutes following IV administration. Serum concentration declined with a half-life of 2 to 3 hours following either intravenous or intramuscular administration in adults and in the pediatric population, including premature infants.
Indications
- INDICATIONS AND USAGE Colistimethate for Injection, USP is indicated for the treatment of acute or chronic infections due to sensitive strains of certain gram-negative bacilli. It is particularly indicated when the infection is caused by sensitive strains of Pseudomonas aeruginosa . This antibiotic is not indicated for infections due to Proteus or Neisseria . Colistimethate for Injection, USP has proven clinically effective in treatment of infections due to the following gram-negative organisms: Enterobacter aerogenes, Escherichia coli, Klebsiella pneumoniae and Pseudomonas aeruginosa.
Common Doses
- 150 mg
- 2 mL
- 75 mg
- 5 mg
Dosage
DOSAGE AND ADMINISTRATION Important: Colistimethate for Injection, USP is supplied in vials containing colistimethate sodium equivalent to 150 mg colistin base activity per vial. Reconstitution for Intravenous or Intramuscular Administration The 150 mg vial should be reconstituted with 2 mL Sterile Water for Injection, USP. The reconstituted solution provides colistimethate sodium at a concentration equivalent to 75 mg/mL colistin base activity. During reconstitution swirl gently to avoid frothing.
Contraindications
- CONTRAINDICATIONS The use of Colistimethate for Injection, USP is contraindicated for patients with a history of sensitivity to the drug or any of its components.
Side Effects
- ADVERSE REACTIONS The following adverse reactions have been reported: Gastrointestinal: gastrointestinal upset Nervous System: tingling of extremities and tongue, slurred speech, dizziness, vertigo, paresthesia and seizures Integumentary: generalized itching, urticaria and rash Body as a Whole: fever and anaphylaxis Laboratory Deviations: increased blood urea nitrogen (BUN), elevated creatinine and decreased creatinine clearance Respiratory System: respiratory distress and apnea Renal System: nephrotoxicity and decreased urine output For medical advice about adverse reactions contact your...
Interactions
- Drug Interactions Certain other antibiotics (aminoglycosides and polymyxin) have also been reported to interfere with the nerve transmission at the neuromuscular junction. Based on this reported activity, they should not be given concomitantly with Colistimethate for Injection, USP except with the greatest caution. Curariform muscle relaxants (e.g., tubocurarine) and other drugs, including ether, succinylcholine, gallamine, decamethonium and sodium citrate, potentiate the neuromuscular blocking effect and should be used with extreme caution in patients being treated with Colistimethate for...