The Round Blue pill marked U27 has been identified as Amphetamine and Dextroamphetamine {Adderall} 10 mg. U27 pill is used to treat attention deficit hyperactivity disorder (ADHD) and narcolepsy. These two drugs belong to a group of drugs called central nervous system stimulants. It also increases concentration and reduces restlessness in patients who are hyperactive, unable to concentrate or easily distracted. U27 tablets are used as a complete treatment program that also includes social, educational, and psychological therapy.