Flunarizinium hydrogen maleate

In the cation of the title salt {systematic name: 4-[bis­(4-fluoro­phen­yl)meth­yl]-1-[(2E)-3-phenyl­prop-2-en-1-yl]piperazin-1-ium hydrogen maleate}, C₂₆H₂₇F₂N₂⁺·C₄H₃O₄⁻, the protonated piperazine ring is in a chair conformation. The dihedral angle between the 4-fluoro­phenyl rings is 68.2 (2)°. An intra­molecular O—H...O hydrogen bond occurs in the anion. In the crystal, N—H...O, C—H...O and C—H...F inter­actions are observed, which link the ions into [001] chains.