A brand orange and round prescription tablet Adderall 20mg is a mixture of amphetamine salts. The formulation of this pill is available in tablet form used to treat ADHD. It belongs to a group of medications known as stimulants and a combination of amphetamine and dextroamphetamine. This generic pill is only used with your doctor’s approval. A trade name drug Adderall 20mg is a combo of two salts.