text: Levopropylhexedrine (Eventin) is an adrenergic alkylamine used as an anorectic in Germany and patented by Smith Kline & French in 1947. It has also been used in the anticonvulsant preparation barbexaclone in combination with phenobarbital to offset sedation. Levopropylhexedrine is the levorotatory S-enantiomer of propylhexedrine. The dextrorotatory counterpart is known as dextropropylhexedrine.