Introduction of toxicology, types of toxic substances, metabolic pathways of some drug types, immunological screening, EMIT and radio-immunoassay techniques, toxicological analysis, body tissue, urine and blood sample preparation, extraction procedures, Thin layer chromatography as a presumptive analysis, use of Gas chromatography, Gas chromatography-mass spectrscopy and High performance liquid chromatography, pharmokinetics, drug elimination, estimation of time since dosage