Toxicology is the analysis of blood and urine for the presence of chemical substances and is used in the case of sudden death and fatal accident enquiries. A toxicology report is done on blood and tissue to establish whether any toxic substances in the body contributed to the death. The report will detail prescription drugs, illegal drugs, alcohol and any other chemical substances which the toxicologist has been instructed to test for. It will usually take between six and eight weeks for the toxicology report to be completed. You can ask for a copy of this with the post mortem report.