The chemical name oaf ezogabine is N-[2-amino-4-(4-fluorobenzylamino)-phenyl] carbamic acid ethyl ester, and it has the following structure:

  (ezogabine) Structural Formula Illustration

The empirical formula is C16H18FN3O2, representing a molecular weight of 303.3. Ezogabine is a white to slightly colored, odorless, tasteless, crystalline powder. At room temperature, ezogabine is practically insoluble in aqueous media at pH values above 4, while the solubility is higher in polar organic solvents. At gastric pH, ezogabine is sparingly soluble in water (about 16 g/L). The pKa is approximately 3.7 (basic).

POTIGA is supplied for oral administration as 50-, 200-, 300-, and 400-mg film-coated immediate-release tablets. Each tablet contains the labeled amount of ezogabine and the following inactive ingredients: carmine (50- and 400-mg tablets), croscarmellose sodium, FD&C Blue No. 2 (50-, 300-, and 400-mg tablets), hypromellose, iron oxide yellow (200- and 300-mg tablets), magnesium stearate, microcrystalline cellulose, polyethylene glycol 3350, polyvinyl alcohol, talc, and titanium dioxide.

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