Established brands are usually available in up to a two-week supply. Large supplies of inexpensive tablets or capsules may encourage abusers to take large doses. Caffeine is the familiar active ingredient in coffee, tea, and many soft drinks. It is a synthetic stimulant that closely resembles ephedrine. There are four possible forms of ephedrine, one of which is pseudoephedrine.
Pseudoephedrine is longer-acting than ephedrine, which makes it preferable as a nasal decongestant.
It also raises blood pressure and heart rates, especially when more than the recommended dose is taken. It was an effective nasal decongestant. They would also break it open and consume the amphetamine. It soon became necessary to change the active ingredient of the inhaler. It is chemically similar to amphetamine, but is not a powerful stimulant and is thought to be less addicting.