Tinzaparin is a low-molecular-weight heparin (LMWH ... when administered in conjunction with warfarin sodium. Tinzaparin works by inhibiting reactions that lead to the clotting of blood.

Because of differences in manufacturing processes, anti-factor Xa and anti-factor IIa properties, and molecular weight distributions, tinzaparin cannot be used interchangeably with other LMWHs or UFH.