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Efficient penetration into aqueous humor by administration of oral and topical levofloxacin
Masaya Ishida1, Takuya Kataoka, Keiko Niwa
1Department of Ophthalmology, Aichi Medical University, Nagakute, Aichi, Japan.
Purpose:
We investigated whether an optimized combination of oral and topical levofloxacin would lead to higher levofloxacin concentrations in aqueous humor.
Methods:
Fifteen patients with cataracts in both eyes began topical treatment at 1 week before the first surgery and oral treatment at 1 day before the first surgery. On the day of surgery, they received oral and topical levofloxacin at 4 h and 1 h before surgery, respectively. Two days after the first operation, we performed cataract surgery on the second eye with the same drug administration protocol.
Results:
Postsurgery concentrations of levofloxacin in the aqueous humor of the first and second eyes were 2.87±0.89 μg/mL (mean±standard deviation, n=15) and 3.76±1.32 μg/mL, respectively; the levofloxacin level in the second eye was significantly higher than that in the first eye (P=0.0085).
Conclusions:
Our protocol to achieve high aqueous humor concentrations of levofloxacin may be favorable in preventing endophthalmitis after eye surgery.
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