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Gemifloxacin Mesilate

Drug Nomenclature

Synonyms: Gemifloxacin Mesylate; Gemifloxacino, mesilato de; LB-20304 (gemifloxacin); LB-20304a; SB-265805 (gemifloxacin); SB-265805S
USAN: Gemifloxacin Mesylate
INN: Gemifloxacin Mesilate [rINNM (en)]
INN: Mesilato de gemifloxacino [rINNM (es)]
INN: Gémifloxacine, Mésilate de [rINNM (fr)]
INN: Gemifloxacini Mesilas [rINNM (la)]
INN: Гемифлоксацина Мезилат [rINNM (ru)]
Chemical name: (±)-7-[3-(Aminomethyl)-4-oxo-1-pyrrolidinyl]-1-cyclopropyl-6-fluoro-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid 74-(Z)-(O-methyloxime) methanesulfonate
Molecular formula: C18H20FN5O4,CH4O3S =485.5
CAS: 204519-64-2 (gemifloxacin); 204519-65-3 (gemifloxacin mesilate)
ATC code: J01MA15

Adverse Effects and Precautions

As for Ciprofloxacin. Skin rashes may be more common with gemifloxacin and treatment should be stopped if they occur.



As for Ciprofloxacin.

Antimicrobial Action

As for Ciprofloxacin. Gemifloxacin is reported to have greater activity against Gram-positive bacteria, including pneumococci, than ciprofloxacin.


Gemifloxacin is rapidly absorbed from the gastrointestinal tract with an absolute bioavailability of about 71%. Peak plasma concentrations occur 0.5 to 2 hours after an oral dose. Gemifloxacin is widely distributed into body tissues including the bronchial mucosa and lungs, and is about 55 to 73% bound to plasma proteins. It undergoes limited hepatic metabolism and has an elimination half-life of about 7 hours. It is excreted as unchanged drug and metabolites in the faeces and urine. Urinary excretion is by active tubular secretion and is reduced by probenecid. Distribution into milk has been found in rats.

Uses and Administration

Gemifloxacin is a fluoroquinolone antibacterial with actions and uses similar to those of ciprofloxacin. It is given orally, as the mesilate, for the treatment of community-acquired pneumonia and acute bacterial exacerbations of chronic bronchitis.

Doses are expressed in terms of the base; 399 mg of gemifloxacin mesilate is equivalent to about 320 mg of gemifloxacin. T

he usual dose is 320 mg once daily for 5 days in patients with bronchitis or for 7 days in those with pneumonia. For details of reduced doses in patients with renal impairment, see below.

Administration in renal impairment

Doses of gemifloxacin should be halved in patients with a creatinine clearance of 40 mL/minute or less, including those receiving haemodialysis or continuous peritoneal dialysis.

Proprietary Preparations

Brazil: Factive; Russia: Factiv; South Africa: Factive; USA: Factive.

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