An Open Label, Randomised, Repeat Dose Study to Assess the Pharmacokinetic Performance of Five Ezogabine/Retigabine Modified Release (MR) Formulations at Steady State Compared to the Immediate Release (IR) Formulation.

Ezogabine MR1 at a dose strength of 300 mg will be orally administered with approximately 250 milliliter (mL) of water to group A subjects during the bioavailability phase. For the food effect phase subjects in group G will be orally administered MR1 tablets at a dose strength of 600 mg.

Ezogabine MR2 at a dose strength of 300 mg will be orally administered to group B subjects with approximately 250 mL of water during the bioavailability phase. For the food effect phase subjects in group H will be orally administered MR2 tablets at a dose strength of 600 mg.

Ezogabine MR3 will be orally administered with approximately 250 mL of water to group C subjects during the bioavailability phase. For the food effect phase subjects in group I will be orally administered MR3 tablets at a dose strength of 600 mg.

Ezogabine MR4 will be orally administered with approximately 250 mL of water to group D subjects during the bioavailability phase. For the food effect phase subjects in group J will be orally administered MR4 tablets at a dose strength of 600 mg.

Ezogabine MR5 will be orally administered with approximately 250 mL of water to group E subjects during the bioavailability phase. For the food effect phase subjects in group K will be orally administered MR5 tablets at a dose strength of 600 mg.

Ezogabine IR at dose strengths of 50 mg and 200 mg will be orally administered with approximately 250 mL of water.