Adderall 20 mg is an oral prescription medication for the management of Adhd and Narcolepsy, and it belongs to the class of drugs called stimulants. Now you can buy Adderall 20 mg; It contains two salts, namely amphetamine and dextroamphetamine, in equal ratio. It is a chemically substituted amphetamine that helps effectively manage the condition and is available as an immediate and extended-release tablet. The effect of Xanax kicks in within 30 minutes, and the impact of the drug lasts for three to four hours.