When school started, I saw 3 of my classmates inhaling the "Vicks Vapor Inhaler". It's extremely addictive, and Mr Tuang knows it so he took Linus' inhaler and threw it away. Sadly enough my classmates picked up the habit and purchased their own inhaler. The inhaler contains 50mg of Levmetamfetamine (nasal decongestant) and Bornyl acetate, camphor, lavender oil, and menthol which the website labelled as inactive ingredients.

Levmetamfetamine(other names: l-desoxyephedrine, l-methamphetamine, levo-methamphetamine) is the l- stereoisomer of methamphetamine which may be used in over-the-counter nasal decongestants. It can raise the blood pressure and cause the heart to beat rapidly, but is not thought to be nearly as addictive or psychoactive as the d- isomer of methamphetamine. Its common side affects include muscle tremors and stomach cramps. - From Wikipedia article on "levmetamfetamine"

When using this product do not exceed recommended dosage. Temporary burning, stinging, sneezing, or increased nasal discharge may occur Frequent or prolonged use may cause nasal congestion to recur or worsen

12 yrs. & older: 2 inhalations in each nostril, not more often than every 2 hours. - From Vicks' official website