The use of antibiotic drugs was studied in university teaching hospita
ls in Tartu, Estonia, Huddinge, Sweden and Badajoz, Spain. Data on dru
g deliveries to hospital wards during 1992 are presented in defined da
ily doses (DDD) per 100 bed-days (DDD/100 bed-days). In addition, the
time trends of antibiotic use in Tartu University Hospital from 1992 t
o 1995 are shown. The total amount of antibiotic drugs used for system
ic treatment in 1992 mas similar in the 3 hospitals, 41 DDD/100 bed-da
ys in Tartu vs. 51 DDD/100 bed-days in Badajoz and 47 DDD/100 bed-days
in Huddinge. The antibiotics used most frequently were tetracyclines
and aminoglycosides in Tartu, broad-spectrum penicillins and cephalosp
orins in Badajoz and narrow-spectrum penicillins and cephalosporins in
Huddinge. Injectable preparations accounted fbr one-half of the antib
iotics used. Among the medical departments? the total use of antibioti
cs varied up to 3-fold (from 19 to 61 DDD/100 bed-dags), less than amo
ng the surgical departments (18-94 DDD/100 bed-days). The frequency of
antibiotic use was very similar in departments of similar profile in
the 3 hospitals (i.e. in departments of neurology, urology, etc.). The
use of antibiotic drugs in intensive care units was twice as high in
Huddinge (243 DDD/100 bed-days) as in Badajoz (106 DDD/100 bed-days) a
nd Tartu (135 DDD/100 bed-days) in 1992, In conclusion, the internatio
nal differences in the use of antibiotics in hospital were not in the
frequency of use, but in the predominant prescription preferences in t
he hospital.