A 31-year-old Thai woman has been arrested by Japanese police for allegedly smuggling etomidate, known as ¡°zombie cigarettes,¡± in a suitcase.

According to Osaka Customs, this was the first case of etomidate-related police action taken at Kansai International Airport in Osaka Prefecture. Etomidate, which causes muscle spasms and erratic behavior in some cases, was added to Japan¡¯s list of controlled substances in May last year.

Tuela Kanwara was arrested and later indicted for allegedly smuggling 1,002 cartridges of the substance totaling about 500 grams in a suitcase on a plane from Thailand into Japan on Nov. 5.

The cartridges were concealed in seven snack packets, according to the Osaka Prefectural Police¡¯s Kansai airport police station and others.

She was traveling with a Malaysian man, who was also arrested and indicted for allegedly smuggling stimulants into Japan.