The Types segment of the Citicoline Sodium for Injection market is categorized by formulation and delivery mechanisms. _Sodium Citicoline_, the primary active ingredient, dominates due to its direct conversion to cytidine and choline, critical for neurotransmitter synthesis. This form accounts for ~70% of the market, supported by regulatory approvals and clinical validation. _Isocitrate-based derivatives_, a niche variant, constitute ~30% and are primarily used in research or combination therapies, offering lower stability but higher metabolic efficiency in specific conditions. Formulation advancements, such as lyophilized injectables and extended-release variants, further diversify the market taxonomy. The sodium citicoline segment’s growth is fueled by hospital-based administration and pharmaceutical partnerships, while isocitrate derivatives remain constrained by production costs and limited clinical data. This segmentation underscores the market’s dependence on formulation innovation and therapeutic specificity.