Geocillin (carbenicillin indanyl sodium) , a semisynthetic penicillin, is the sodium salt of the indanyl ester
of Geopen® (carbenicillin disodium). The chemical name is: 1-(5-Indanyl)-N-(2-carboxy-3,3-
dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0] hept-6-yl)-2-phenylmalonamate monosodium
The structural formula is:
The empirical formula is: C26H25N2NaO6S
and mol. wt. is 516.55.
Geocillin (carbenicillin indanyl sodium) tablets are yellow, capsule-shaped and film-coated, made of a white
crystalline solid. Carbenicillin is freely soluble in water. Each Geocillin (carbenicillin indanyl sodium)
tablet contains 382 mg of carbenicillin, 118 mg of indanyl sodium ester. Each
Geocillin (carbenicillin indanyl sodium) tablet contains 23 mg of sodium.
Inert ingredients are: glycine; magnesium stearate and sodium lauryl sulfate. May also include the following: hydroxypropyl cellulose; hypromellose; opaspray (which may include Blue 2 Lake, Yellow 6 Lake, Yellow 10 Lake, and other inert ingredients); opadry light yellow (which may contain D&C Yellow 10 Lake, FD&C Yellow 6 Lake and other inert ingredients); opadry clear (which may
contain other inert ingredients).
Last reviewed on RxList: 4/8/2008
This monograph has been modified to include the generic and brand name in many instances.