The active ingredient in FAMVIR tablets is famciclovir, an orally administered prodrug of the antiviral agent penciclovir. Chemically, famciclovir is known as 2-[2-(2-amino-9H-purin-9-yl)ethyl]-1,3-propanediol diacetate. Its molecular formula is C14H19N5O4; its molecular weight is 321.3. It is a synthetic acyclic guanine derivative and has the following structure

FOSRENOL contains lanthanum carbonate (2:3) hydrate with molecular formula La2(CO3)3 xH2O (on average x=4-5 moles of water) and molecular weight 457.8 (anhydrous mass). Lanthanum (La) is a naturally occurring rare earth element. Lanthanum carbonate is practically insoluble in water.

Metronidazole is an oral synthetic antiprotozoal and antibacterial agent, 2-methyl-5nitroimidazole-1-ethanol, which has the following structural formula:

PLENDIL (felodipine) is a calcium antagonist (calcium channel blocker). Felodipine is a dihydropyridine derivative that is chemically described as ethyl methyl 4-(2,3-dichlorophenyl)-1,4- dihydro-2,6-dimethyl-3,5-pyridinedicarboxylate. Its empirical formula is C18H19Cl2NO4 and its structural formula is:

PROZAC (fluoxetine hcl) (fluoxetine capsules, USP) is a selective serotonin reuptake inhibitor for oral administration. It is also marketed for the treatment of premenstrual dysphoric disorder (Sarafem, fluoxetine hydrochloride). It is designated ()-N-methyl-3-phenyl-3[(?,?,?-trifluoro-p-tolyl)oxy]propylamine hydrochloride and has the empirical formula of C17H18F3NOHCl. Its molecular weight is 345.79. The structural formula is:

FROVA (frovatriptan succinate) tablets contain frova (frova (frovatriptan succinate) triptan succinate) triptan succinate, a selective 5-hydroxy-tryptamine1 (5-HT1B/1D) receptor subtype agonist, as the active ingredient. Frova (frova (frovatriptan succinate) triptan succinate) triptan succinate is chemically designated as R-(+) 3-methylamino-6-carboxamido-1,2,3,4-tetrahydrocarbazole monosuccinate monohydrate and it has the following structure:

Feraheme, an iron replacement product, is a non-stoichiometric magnetite (superparamagnetic iron oxide) coated with polyglucose sorbitol carboxymethylether. The overall colloidal particle size is 17-31 nm in diameter. The chemical formula of Feraheme is Fe5874O8752-C11719H18682O9933Na414 with an apparent molecular weight of 750 kDa.

Factor IX Complex, Konyne (factor ix complex) 80, heat-treated at 80C for 72 hours, is a sterile, dried, plasma fraction comprising coagulation factors II, IX, X and low levels of factor VII.

Femara tablets for oral administration contains 2.5 mg of letrozole, a nonsteroidal aromatase inhibitor (inhibitor of estrogen synthesis). It is chemically described as 4,4'-(1H-1,2,4-Triazol-1ylmethylene) dibenzonitrile, and its structural formula is

FLULAVAL, Influenza Virus Vaccine, for intramuscular injection, is a trivalent, split-virion, inactivated influenza virus vaccine prepared from virus propagated in the allantoic cavity of embryonated hens' eggs. Each of the influenza virus strains is produced and purified separately. The virus is inactivated with ultraviolet light treatment followed by formaldehyde treatment, purified by centrifugation, and disrupted with sodium deoxycholate.