ADULTS WITH SERIOUS INFECTIONS :- 3 MG/KG/DAY, ADMINISTERED IN 3 EQUAL DOSES EVERY 8 HOURS.
ADULTS WITH LIFE-THREATENING INFECTIONS :- UPTO 5 MG/KG/DAY, IN 3 OR 4 EQUAL DOSES.
CHILDREN 6 TO 7.5 MG/KG/DAY IN 3 OR 4 EQUALLY DIVIDED DOSES (2 TO 2.5 MG/KG/ EVERY 8 HOURS OR 1.5 TO 1.89 MG/KG/ EVERY 6 HOURS.
PREMATURE OR FULL-TERM NEONATES ONE WEEK OF AGE OF LESS :- UPTO 4 MG/KG/DAY MAY BE ADMINISTERED IN 2 EQUAL DOSES EVERY 12 HOURS.
URINARY-TRACT INFECTION, BY INTRAMUSCULAR INJECTION, 2 - 3 MG/KG DAILY AS A SINGLE DOSE
NOTE ONE-HOUR (βPEAK') SERUM CONCENTRATION SHOULD NOT EXCEED 10 MG/LITRE; PRE-DOSE (βTROUGH') CONCENTRATION SHOULD BE LESS THAN 2 MG/LITRE