Cigarette smoking is one of the most sort out legal drug to get high by many people. Why is this so? Studies have shown that tobacco the main ingredient found in a cigarette is the sort out after drug by people who smoke. This drug is either ingested or taken in by smoking i.e., Inhaling. The resulting smoke is absorbed by the lungs through the alveoli and passed into the blood stream where it heads to the heart and lastly the brain.