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Absorption of Nicotine Vapor From Smoke-Free Cigarettes

Michael A. H. Russell, FRCP; Martin J. Jarvis, MPhil; Gay Sutherland, MPhil; Colin Feyerabend, PhD

JAMA. 1987;257(23):3262-3265.

Abstract
Nicotine replacement is a promising new approach to aid smoking cessation, and various methods of delivery are being developed. One new device is a smoke-free cigarette (Favor) that has been test-marketed in several US states. Without lighting up, it delivers nicotine vapor and is free of other harmful products of tobacco smoke. To examine its therapeutic potential, we measured plasma nicotine concentrations before, during, and after its use in eight male subjects. Very little nicotine was absorbed when it was puffed like a conventional cigarette. However, with an intensive schedule of puffing at four further smoke-free cigarettes over a 20-minute period, plasma nicotine concentrations were increased by an average of 17.3 ng/mL (107.3 nmol/L) (range, 10.9 to 30.4 ng/mL [67.6 to 188.5 nmol/L]). Heart rate and blood pressure also increased significantly. The rate of nicotine absorption was slow and resembled that obtained from nicotine chewing gum, suggesting that most of the nicotine was deposited in the mouth, throat, and large airways and did not reach the lung alveoli. Despite the slow absorption, the plasma nicotine levels produced could be of therapeutic value as an aid to smoking cessation.

(JAMA 1987;257:3262-3265)

Author Affiliations
From the Addiction Research Unit, Institute of Psychiatry (Dr Russell, Mr Jarvis, and Ms Sutherland), and the Poisons Unit, New Cross Hospital (Dr Feyerabend), London.

Footnotes
Reprint requests to Addiction Research Unit, Institute of Psychiatry, 101 Denmark Hill, London SE5 8AF, England (Dr Russell).

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