FIELD: medicine, pharmaceutics.SUBSTANCE: group of inventions relates to methods of obtaining a lyophilised preparation of tetrodotoxin and to a tetrodotoxin preparation for relief of the drug withdrawal in case of addiction to opiates. The method of obtaining the lyophilised preparation of tetrodoxin includes the following stages: 0.1-20 mcg/dose of tetrodotoxin is dissolved with 0.1% solution of citric acid to regulate pH within the range of 3.5-4.5 in injection water and filtered to remove pyrogen separately dissolved are: a stabiliser - dextran or trehalose - and a filling agent, representing an isotonic solution of sodium chloride or mannit in injection water. After that, 0.1% solution of citric acid is added to regulate pH within 3.5-4.5, then, activated carbon is added with keeping at a temperature of 60°C and mixing for more than 30 minutes, filtering to remove pyrogen and cooling to room temperature. After homogeneous mixing of the obtained solutions and realisation of ultrafiltration, lyophilic drying is carried out. Lyophilic drying consists in preliminary freezing, drying under vacuum at reduced temperature, drying under vacuum at increased temperature, with each drying being performed at a certain temperature for the specified time period. After that, filling with inert gas is performed with control of water content at 3% level, with further sealing. Another version includes addition of additional solution of lidocaine chloride to the solution of tetrodotoxin and citric acid at the first stage. Also disclosed is the tetrodotoxin preparation for relief of the drug withdrawal in case of addiction to opiates, obtained by the said method, which is characterised by the weight ratio tetrodotoxin:filling agent:stabiliser, equal to 1:(150-3000):(50-6000).EFFECT: claimed group of inventions ensures obtaining the stable tetrodotoxin solution with accurate dosage, which is used for introduction into the human organism.25 cl, 9 tbl, 14 dwgГруппа изобретений относит
