BRITISH -AMERICAN TOBACCO COMPANY LTD A member ofthe B-A-T Inclusuies Group Registered Office: PO BOX 482 Wesuninster House 7 NUllbank London S W I P 37- Telephone: oi-z22 =22 Telex: 27384 BATTOB G 4 th May 1988 Dr. V. D. Rowland, Rothmans international, Aylesbur, Dear David, I would suggest that, rather than concentrating your discussion arcund their references, that vou argue against the concept of tobacco depen_~ence in its specific aspects, bringing in their references as necessarv. think- that would make the reply more structured and it would certaini, constitL:te a valid scientific argument that they'd have difficulty refuting. Just because DSM III decrees that there is such a thing as tobacco dependence does not make it true if the evidence is largely against iz.' I enclose a summary of an approach that I've fcund to be quite convincing in the past. If you take the major components of the definitions of addiction one by one and consider the evidence for smoking/nicotine then it does not add up to a particularly convincing picture. I'm a little worried about vour last two sentences and would reco=end their removal" I hope this helps! With best wishes, L Dr. Sharon Bo,se Un Lj4 Enc(s) (71, fricorn,orated in London Number 74974 Cabl-Vehicularl-andonMr BATCo document for Province of British Columbia 29 October 1999 It is -ell known that a satisfactorv definition -,f "addiction" (i.e. one that takes into account all factors that could reasonably be supposed to be associated with the problem, and that has received widespread acceptance in both academic and regulatory circles) probably does not exist. However, by and large the majority of definitions of "addiction" or "dependence" incorporate a number of components which are given varying degrees of weight according to the particular definition. If one considers the individual components that have been used to constitute most of the -idely-kno-n definitions, then it is clear that smoking does not easily fit into any such model. Phi-sical dependence. The existence of phvs;cal dependence is an inference made from the observations of a stereccyped withdrawal syndrome that occurs when a chronically-administered drag discontinued. Shiffman (1979) concluded that "....the presence of an abs--inence syndrome is cruciai to the definition of drug dependence". ::owever, there is considerable doubt as to whether any symptoms -.`a~ smokers may experience hdrawal, or merely symptoms when they stop smoking are a result of true wit;"; of frustration encountered by many people when :ney decide to give up something that they enjoy. C...... BPING IN NIDA, SHIFFMAN etc] 2. Ps,chological dependence [...... 3RING IN HENNINGFIELD 1984 - NO E%;I,'--.',CE OF EUPHORIA; DI-fIC1"7-Y _ IN SELF-ADMISISTRATION IS ANI~tk:_zj 3. Tolerance. Whilst some tolerance has been o~.-served to develop to the peripheral effects of nicotine and a certain a=.-,.;nt of metabolic tolerance occurs, there is no convincing evidence to suggest that tolerance develops to whatever psychological benefits smokers may notain from cigarette smoking (e.g. improvements in performance etc). Also, it is well known that once smokers stabilise into a regular pattern of smoking behaviour thev do not tend to increase the;r level of smo'--ng with time, as is commonlv otserved with ali addictive substances. cont ............. LTI BATCo document for Province of British Columbia 29 October 1999 4. Loss of control. Loss of control of substance intake is widely held to be a major component of addictive behaviour e..-. in alcoholics. This does not occur in smokers. 5. Deterioration of the individual's functioninit. Since smoking does not result in any degree of intoxication as do most drugs of abuse, there is no way in which the psychological functioning of the individual may deteriorate, and similarly, he is unlikely to become a danger to society as a result of his habit. This is considered to be an important part of a definition of addiction by the WHO (1957), and by the National Institute on Drug Abuse (1979). k./4 BATCo document for Province of British Columbia 29 October 1999