Gentamicin in the treatment of lower genital tract infections: level of the drug in menses, cervical mucus and vaginal fluid.

The concentration of gentamicin in serum, menses, cervical mucus and vaginal fluid of 39 women under treatment with this antibiotic (80 mg every 8 hr i. m.) was tested by the agar diffusion method. The levels of the drug in the serum varied from 1.88-5.41 micrograms/ml with a peak one hour after the last dosage. In the menses the levels ranged from 2.06-5.87 micrograms/ml with a peak also one hour after the last dosage. The concentration of gentamicin in the cervical mucus and vaginal fluid varied from 0.67-5.14 micrograms/ml and 0.63-6.43 micrograms/ml with a peak three hours after the last administration of the drug. Results are briefly discussed.