sentences:  Its name is a portmanteau of "dextro"- amphetamine and "amyl"- barbitone.Dexamyl was discontinued in 1982 by SKF in favor of monoamine oxidase inhibitors (MAOIs) and tricyclic antidepressants (TCAs) which were recently developed and shared treatment indications with Dexamyl yet lacked the high dependence potential and abuse liability which characterized long-term Dexamyl usage.British Prime Minister Anthony Eden was prescribed Dexamyl; he was using it to treat abdominal pain.