➤ It is localized in such body structures as brain cells, muscles, liver, lungs, and skin derivatives (hair, nails).

➤ It has a catalytic effect in the process of hemoglobin synthesis.

➤ Leads to dermatologic diseases, respiratory diseases, heart muscle, central nervous system and reproductive system.

Nephropathy is a characteristic condition.

➤ Increased vascular wall permeability and hemocapillary plethora.

➤ Causes the formation of necrobiotic sites in the structures of vital organs: liver, heart, intestines, kidneys.

➤ Causes intoxication of the body with various types of pesticides and contaminated water.

➤ Causes carcinogenic effects on the respiratory system and skin.

➤ Decreased resistance of the immune system to foreign factors, possible occurrence of skin diseases and disruption of hematopoiesis.

➤ A feeling of exhaustion accompanied by a deterioration in overall health.

​➤ As₂O₃ (Arsenic trioxide)

​➤ N₂HAsO₄ ·7H₂ O (Sodium arsenate) - 1% solution (together with strychnine): general strengthening and tonic.

​➤ Al₂O₃ (arsenic anhydride, white arsenic) 0.005 g: the drug has a necrotizing effect for the treatment of diseases of dermatological origin and painful conditions of the body (anemia, neurasthenia).

➤ In the treatment of diseases of venereal origin (novarsenol, miarsenol).

➤ Widely used in dental practice for the devitalization of tooth pulp.

​​➤ ​The arsenic compound salvarsan is historically the first effective and harmless etiotropic medicine against syphilis and psoriasis.

➤ As₂O₃ - white arsenic, a strong poison.

➤ Arsine AsH₃ - gas - the most poisonous arsenic compound (AsH₃ 0.005 g - instant death). Arsenic organic compounds affect the upper respiratory tract.

➤ Antidotes: Na₂S₂O₃ , MgS₂O₃ , milk casein binds arsenic.

➤ In the III-IV centuries BC, the metal arsenic was mentioned - the only metal with a boiling point below the melting point.

➤ Lewisite is a poisonous substance with a skin-bursting (blistering) effect.

➤ Aqua Tofana is a poison containing an aqueous solution of arsenic acid.

➤ Trimethylarsen(CH₃)₃  As - has a characteristic odor of garlic, and was used to poison Napoleon.