This group comprises heparin preparations, including products for non-therapeutic use, e.g. for rinsing of indwelling vein cannulas. Heparin sodium and heparin calcium are classified at the same 5th level, i.e. B01AB01. The low molecular weight heparins are classified at separate 5th levels.
Both human-derived and recombinant products of antithrombin III are classified in B01AB02.