General pharmacological properties of a low molecular weight heparin in rodents.

The effects on central nervous system of a new low molecular weight heparin (OP/LMWH) were studied in mice and rats. The effect of OP/LMWH on respiration, blood pressure and heart rate was studied in guinea-pigs and rats. In these studies unfractionated heparin was used for comparison. OP/LMWH, up to 10 mg/kg/s.c., did not show any effect on central nervous system and did not increase the blood pressure, heart rate and respiration rate up to 10 mg/kg i.v. At the same dosages, heparin presented effects similar to those shown by OP/LMWH.