Name one plant and the addictive drug extracted from its latex. How does this drug affect the human body?

Explanation

(i) Papaver somniferum (Poppy plant) and the addictive drug extracted from its latex is morphine.
It is widely used as a sedative and an anxiolytic agent. It is widely used in small doses to relieve pain and induce sleep in cases fo serious injuries, burns, fractures and sugeries. Its continued used may cause dependence. It reduces heart beat, blood pressure and urine output, increases blood sugar and causes constipation.