The drug must be at once withheld if haemorrhages (subcutaneous, retinal, &c.) are observed.
These crystals are extremely resistant to absorption, are found in old blood clots, and have been known to persist in old cerebral haemorrhages after many years.
The lungs are engorged and oedematous, and often show haemorrhages.
The serous membranes show petechiae and haemorrhages.
A widespread toxic action is indicated by the lesions found - cloudy swelling, which may be followed by fatty degeneration, in internal organs, capillary haemorrhages, &c. In septicaemia.