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➤ Symptoms of an apathetic state of the body are observed, and the formation of malignant tumors is possible.

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➤ ²²⁵₈₉Ac-DOTA (complex of actinium-225 isotope with DOTA) - 50 kBq.

➤ Actinium-225 is used in the treatment of respiratory tract oncology, leukemia, and adenocarcinomas.

➤ It is characterized by a high radioactive effect aimed at the destruction of cancer cells by destroying their genetic material and disrupting the growth process.

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➤ Causes destruction of cellular structures and hereditary material of the body.

➤ Leads to radiation burns and dysfunction of visceral organs.

➤ Antidote: taking iron oxide or other chemoprotectors.

➤ ²²⁷Ac has a variable half-life: radium-derived Ac has a half-life of 21.8 years, while actinium-derived Ac has a much shorter half-life.