Latrodectus mactans

The bite produces tetanic effects that last several days. A picture of Angina pectoris is presented by the action of the drug. The praecordial region seems to be the center of attack. Constriction of chest muscles, with radiation to shoulders and back. Lowered coagulability.
Head: Anxiety. Screams with pain. Pain in neck to back of head. Occipital pain.
Respiratory: Extreme apnoea. Gasping respiration. Fears losing breath.
Chest: Violent, praecordial pain extending to the axilla and down the arm and forearm to fingers, with numbness of the extremity. Pulse feeble and rapid. Sinking sensation at the Cramping pain from chest to abdomen.
Extremities: Pain in left arm, feels paralyzed. Weakness of legs followed by cramps in the abdominal muscles. Paraesthesia of lower limbs.
Skin: Coldness of whole surface. Skin cold as marble.