Seconal is a trademark name for the barbiturate sodium quinalbarbitone. It was widely used recreationaly in the 1960s and 1970s. Nicknamed "reds", Seconal came in red capsules. Its main medical uses are for seizures, tension relief (as before surgery), and as a temporary sleep aid. It is fairly addictive, and withdrawal symptoms can occur when a continual use is abruptly ended.