1 Spread of the cancer to other parts of the body: Pain caused by cancer itself is more common in people who have metastatic (or advanced) disease, in which the breast cancer spreads to other parts of the body.
Toxicological Effects: 1  Acute toxicity: Atrazine is slightly to moderately toxic to humans and other animals. 2  Chronic toxicity: Some 40% of rats receiving oral doses of 20 mg/kg/day for 6 months died with signs of respiratory distress and paralysis of the limbs.
It's estimated that atrazine can increase crop yields by up to six percent. Atrazine has also been used in conservation tillage systems to control weeds and reduce soil erosion. As late as 2002, it was estimated that atrazine was the most commonly used herbicide in the world with applications in 80 countries. But studies around that time showed that atrazine was dissolving into water in the fields and was showing up in streams and underground drinking water supplies all over the world.