Volume 23, Issue 6
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645



A pharmacologic study of clofazimine (B663) was carried out in mice and human subjects to provide information needed for interpretation of data from studies of drug action in the two species. The quantities of B663 in mouse carcasses were measured to determine the half-time of disappearance (t ½) of the drug and the absorption of the drug after oral administration. The antimicrobial activity of orally-administered B663 was studied in mice infected with and correlated with the quantity of B663 in the carcass. Published studies of the effect of the drug in murine infections with and were reinterpreted. The t ½ of B663 is about 1 week in male BALB/c mice. The antimicrobial effect of the drug appears to require a concentration in the mouse carcass smaller than 1 mg/kg for and greater than 5 to 10 mg/kg for . The concentration of B663 was also measured in the plasma, urine and feces of volunteers and leprosy patients. The t ½ of the drug is at least 70 days in man. The disposition of the drug thus differs greatly between the two species, making difficult the transfer of information from laboratory to clinic.


Article metrics loading...

The graphs shown below represent data from March 2017
Loading full text...

Full text loading...

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error