Well, you aren't alone. You are among the many who wrongly think so..
The truth is Inhalation, or smoking, is the fastest route to the brain (takes 5-10seconds), causing almost instantaneous effects when compared to the intravenous administration that takes 30-120seconds. The reason is simple.
When a psychoactive drug (addictive drug) like tobacco is taken into the depth of the lungs, the drug seeps very quickly into lung blood where it flows through the pulmonary veins to the heart. From the heart the drug is pumped into the systemic circulation that feeds the brain.
In contrast, a . . .
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