Types segmentation dissects Trihexyphenidyl by dosage form, a determinant of both patient adherence and distribution economics. The oral tablet category remains the largest, contributing roughly 75 % of volume because tablets offer fixed dosing, low manufacturing cost, and established supply‑chain channels across generic and branded lines. Oral solutions account for about 15 % of the market; they are preferred for pediatric or dysphagic patients, requiring specialized packaging and higher per‑unit pricing, which inflates revenue despite lower unit sales. Extended‑release tablets, a newer formulation introduced to smooth plasma peaks, represent an emerging 7 % share, driven by neurologists seeking improved tolerability and reduced dosing frequency. Injectable preparations, though limited to investigational settings, occupy the remaining 3 % and are primarily sourced by research institutions evaluating alternative delivery routes. Understanding the proportional impact of each type enables manufacturers to allocate production capacity, negotiate formulary placement, and forecast pricing trends—key components of a robust Trihexyphenidyl market taxonomy.