** Shares of drugmaker Theravance Biopharma TBPH.O fall 31% to $13.51 premarket
** Co says its board is reviewing options, including possible sale, after it ended development of experimental treatment for neurogenic orthostatic hypotension
** Neurogenic orthostatic hypotension is a condition where blood pressure drops sharply when standing
** Co says it will end development of ampreloxetine and cut operating costs by about 60%, including reducing its administrative staff
** TBPH says restructuring will affect around half its workforce and save about $70 mln annually
** Co says it ended 2025 with $326.5 mln in cash; expects ~$400 mln by end-Q1 2026
** Shares up ~99% in 2025
(Reporting by Sahil Pandey in Bengaluru)
((Sahil.Pandey@thomsonreuters.com))