Smoking can be good for you! -- LiveWire Teen Forums

Smoking is without doubt one of the greatest causes of avoidable illness and death in the modern world. Most well known is the relationship between smoking and numerous cancers, cerebrovascular and cardiovascular disease.
Smoking and most especially nicotine, are, however, sometimes beneficial in certain diseases, including Parkinson's, Alzheimer's, allergic alveolitis, nausea and vomiting of pregnancy, pre-eclampsia, fibroids, carcinoma of body of uterus, ulcerative colitis, pyoderma gangrenosum, aphthous stomatitis and ulceration, pemphigus, herpes simplex and acne.
In the immensely justifiable enthusiasm to discredit this dangerous activity, the mechanisms behind these beneficial effects tend to have been un-discussed or ignored.
It is the aim of this paper to spur interest in the reasons for these effects. If the mechanisms are elucidated, therapeutic advances may be possible.

http://www.ncbi.nlm.nih.gov/pubmed/17147565

Pure nicotine has no known carcinogenic properties and can be administered in numerous ways including transdermal patches and tablets. As a therapeutic agent, its association with tobacco can be likened to morphine and opium smoking. There is ample clinical evidence to suggest that nicotine could be beneficial in the treatment of some patients with diseases. Pharmacologically, nicotine acts on cholinergic (nicotinic-specific) receptors which are depleted in AD and PD. Nicotinic receptors also interact closely with several neurotransmitters including dopamine, which is implicated in both PD and Gilles de la Tourettes's syndrome.

Nicotine and nicotinic agonists may have a therapeutic potential for a variety of disorders, including Alzheimer's and Parkinson's diseases, depression, attention deficit disorder, Tourette's syndrome and ulcerative colitis. These interests are partially fuelled by the urgent need of the tobacco industry to find new niches for nicotine in a world bound eventually to retire from cigarette smoking. At the same time, there is an increased interest in developing drugs for fighting obesity, a growing affliction of industrialised nations. This review presents data on the potential of nicotine, and in particular synthetic nicotinic agonists, for controlling body weight. Nicotinic agonists may become relatively safe, effective and inexpensive alternatives for several optional drugs currently being developed for treating human obesity, including beta-3-adrenergic agonists, leptin and its agonists, and neuropeptide Y antagonists.

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