sentences:  [9] However, an increased prevalence of central nervous system effects, including headache, dizziness and sleep disturbances have been associated with oral dosages of Lorcainide when compared to intravenous administration.This could be due to a greater accumulation of plasma Noriorcainide when exposed to oral Lorcainide.Noriorcainide, an N-dealkylated derivative, is an active metabolite of Lorcainide.