["Neoceader" contains nicotine. A report of two user's nicotine addiction].

"Neoceader smoking" is widely marketed in drug stores as an over the counter expectorant for cigarette smokers in Japan. Using high-pressure liquid chromatography, we determined that one piece of Neoceader (3 cm) contains 0.79 mg of nicotine, which is equivalent to one-sixth of the amount of nicotine in one Japanese cigarette (Mildseven extra-light, Mildseven super-light, or Sevenstar). Two patients who had switched from cigarette smoking to Neoceader smoking, subsequently became addicted to nicotine. The continine concentration in their urine were 937 ng/ml and 2,724 ng/ml, respectively. These findings demonstrate that Neoceader contains nicotine and that its use can lead to nicotine addiction.