Lactuca Virosa is the scientific term for it, and many people have used it in place of addictive prescription pain medicine. It’s a leafy and tall plant, with small yellow buds, and could be grown right out your door. More commonly found in North America and England, it’s a cousin to the lettuce we typically see at the grocery store. It’s also referred to as bitter lettuce, or more appropriately for the purpose discussed here, opium lettuce.
This milky substance is called lactucarium. And, while it doesn’t contain any opiates, it has similar side effects when used – it acts directly on the central nervous system (CNS) to lessen the feeling of pain, just like morphine.
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The flower head
Lactuca Virosa Wikimedia Commons