toxin-induced parkinsonism

Toxin-induced parkinsonism is a type of secondary parkinsonism that arises from exposure to certain toxins. This condition shares symptoms with Parkinson disease, such as tremors, muscle rigidity, and difficulty initiating movement. These symptoms are caused by the degeneration of neurons in the substantia nigra region of the brain, which leads to a deficiency in the neurotransmitter dopamine.12

While the exact cause of Parkinson disease is unknown, secondary parkinsonism can result from various factors, including exposure to toxins like carbon monoxide, manganese, or cyanide. A notable example is the neurotoxin MPTP, found in contaminated heroin, which can cause parkinsonism. Additionally, head trauma and certain environmental agents are suspected causes of parkinsonism.1

Treatment for parkinsonism often involves medications like levodopa, which helps replenish dopamine levels in the brain, or drugs that mimic dopamine's effects or slow its breakdown. In some cases, surgical interventions may be considered.34