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The need for basic training in toxicology of students of pharmaceutical universities and departments of toxicology is justified. The experience of teaching toxicology and medical protection to students of the St. Petersburg State Chemical Pharmaceutical Academy was analyzed. Academic teaching staff were trained in the methodology of teaching toxicology, and a participated in the preparation of the all-Russian textbook «Toxicology and Medical Protection» (2016) and three tutorials for students of medical and pharmaceutical universities. It is shown that in accordance with the current Federal State Educational Standard of the third generation, toxicology issues are included in the curriculum of a complex discipline «Life Safety. Emergency Medicine» as a stand-alone module. Students study toxicology in the fifth year having received a good basic training in medical, biological, and professional disciplines in previous years. For realization of cognitive and creative activity of students in the educational process, modern educational technologies are used which make it possible to improve the quality of teaching and to use school time more efficiently. The potential of using algorithmic workbooks, interactive forms of training, test control, case-method for facilitating the perception of theoretical knowledge and improving the quality of practical skills development is demonstrated. Results of the anonymous questionnaire survey, in which 153 of 198 students who studied toxicology and medical protection in the autumn semester of the 2017/2018 academic year participated, are reported. It was shown that more than 80% of the students surveyed are convinced of the need to study toxicology during the undergraduate training of specialists of pharmaceutical profile and positively assessed the methodology of teaching toxicology that is performed at the St. Petersburg State Chemical Pharmaceutical Academy.

The objective of the present study was to develop and validate the method for the extraction of toxic substances from the hair samples as exemplified by enzymatic hydrolysis of barbituric acid derivatives. The experiments were carried out with the use of laboratory animals (white female rats and albino guinea pigs) that had been daily given a phenobarbital solution per os during 4 months preceding the study. The hairs obtained from the experimental animals were subjected to acid hydrolysis with a 6 mole hydrochloric acid and enzymatic hydrolysis with the use of chymopsin, trypsin, chymotrypsin, and papain solutions. The analysis of the extracted materials was performed by means of gas chromatography with mass-selective detection. The application of the proposed method for enzymatic hydrolysis produced the better results than acid hydrolysis. This technique was validated. The results of the study made possible the comparative characteristic of the effectiveness of acid and enzymatic hydrolysis.

Introduction. Lately, medical services have reported a lot of cases caused by taking Tropicamide alone or with other drugs together. Moreover, it has been declared that the increase in the number of resistance cases to Tropicamide consumption has. Due to those facts, Tropicamide was included in the List of Drugs for Medical Use that should be served by the prescriptions in 2015. However, nowadays in Russia there are many combinations of medicines, for instance, Tropicamide and α-adrenergic agonist (phenylephrine) (Midrimax, Fenikamid, Appamide plus) that are not under that regulation. As a result, those medicines are served in pharmacies without any prescriptions. Thus, method developing for Tropicamide determination in the hair samples to establish his consumption period has become a perspective one.Aim. The research aimed to develop a method for the isolation and determination of Tropicamide in the hair samples.Materials and method. Reference standard of Tropicamide was used in this research. The following enzymes – papain, chymopsin, chymotrypsin, and hyaluronidase – were applied in the experiment. To design the long-term consumption of Tropicamide, laboratory animals (Guinea pigs, average masses about 200 – 250 g) with fair and brown nature colour hair were used in this research. The hair of laboratory animals was dyed by professional hair-dye "Estel Professional De Luxe". The following equipment was applied: balance "Sartorius СР224S", pH-meter " FiveEasy ", ball mill Retsch MM-200. The hair samples extracts were analyzed by gas chromatography with mass selective detection (Gas chromatograph model 7890А with mass selective detector model 5977 and MassHunter GC/MS software by Agilent Technologies).Results and discussion. All developed methods of enzymatic hydrolysis (by papain, chymopsin, chymotrypsin, and hyaluronidase) revealed comparable results for the Tropicamide determination in the hair samples. The research showed that the amount of the analyte isolated from the pigmented hair was a bit higher in comparison with the other hair samples (fair hair), despite the melanin gives chemical steadiness property to hair stuff. Moreover, the amount of Tropicamide extracted from the dyed hair samples increased by 30 %. The degradation products of the analyte of interest were not found in the extracts obtained for the dyed hair samples. Thus, the colorant does not destroy the xenobiotic during the hair dying procedure and does not impact the enzymatic hydrolysis process. The values of the validation parameters (precision and accuracy) met the required criteria for bioanalytical methods. Therefore, the enzymatic hydrolysis method can be recommended for application in laboratory practice.Conclusion. In the course of the study, a method for laboratory diagnostics of non-drug use of tropicamide was developed, the reproducibility of which meets the acceptance criteria for bioanalytical methods, which makes it possible to recommend it for work in laboratory practice.

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