GEODON is an atypical antipsychotic available as capsules (ziprasidone hydrochloride) for oral administration and as an injection (ziprasidone mesylate) for intramuscular use only. Ziprasidone is a psychotropic agent that is chemically unrelated to phenothiazine or butyrophenone antipsychotic agents. It has a molecular weight of 412.94 (free base), with the following chemical name: 5-[2-[4-(1,2-benzisothiazol-3-yl)-1-piperazinyl]ethyl]-6-chloro-1,3-dihydro-2H-indol-2-one. The empirical formula of C21H21ClN4OS (free base of ziprasidone) represents the following structural formula:
GEODON capsules contain a monohydrochloride, monohydrate salt of ziprasidone. Chemically, ziprasidone hydrochloride monohydrate is 5-[2-[4-(1,2-benzisothiazol-3-yl)-1-piperazinyl]ethyl]-6-chloro-1,3-dihydro-2H-indol-2-one, monohydrochloride, monohydrate. The empirical formula is C21H21ClN4OS ∙ HCl ∙ H2O and its molecular weight is 467.42. Ziprasidone hydrochloride monohydrate is a white to slightly pink powder.
GEODON capsules are supplied for oral administration in 20 mg (blue/white), 40 mg (blue/blue), 60 mg (white/white), and 80 mg (blue/white) capsules. GEODON capsules contain ziprasidone hydrochloride monohydrate, lactose, magnesium stearate and pregelatinized starch. Each capsule for oral use contains ziprasidone hydrochloride monohydrate equivalent to either 20 mg, 40 mg, 60 mg, or 80 mg of ziprasidone.
GEODON for Injection contains a lyophilized form of ziprasidone mesylate trihydrate. Chemically, ziprasidone mesylate trihydrate is 5-[2-[4-(1,2-benzisothiazol-3-yl)-1-piperazinyl]ethyl]-6-chloro-1,3-dihydro-2H-indol-2-one, methanesulfonate, trihydrate. The empirical formula is C21H21ClN4OS ∙ CH3SO3H ∙ 3H2O and its molecular weight is 563.09.
GEODON for Injection is available in a single-dose vial as ziprasidone mesylate (20 mg ziprasidone/mL when reconstituted according to label instructions) [see Dosage and Administration (2.4)]. Each mL of ziprasidone mesylate for injection (when reconstituted) contains 20 mg of ziprasidone and 4.7 mg of methanesulfonic acid solubilized by 294 mg of sulfobutylether β-cyclodextrin sodium (SBECD).