treponemicidal levels of penicillin in the csf were achieved in 31 patients by probenecid , 500 mg/6 hr by mouth , with penicillin g , 500,000 iu by im injection , and by probenecid every six hours by mouth and im injections of penicillin g procaine once a day in two of three patients following injections of 600,000 iu , in four of five following 1.2 million iu , and in three ( now all nine ) following 2.4 million iu .
C0030842
penicillin
C0030830
penicillin g procaine