Can you get high from licking heroin off of a laced envelope?

Licking heroin off a laced envelope is dangerous and not an effective method to achieve a high. The amount absorbed through the mucous membranes in the mouth would likely be minimal and unpredictable. Additionally, the envelope could contain harmful substances or contaminants, posing serious health risks. It's crucial to understand the dangers of heroin use and to seek help if needed.