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Mintys: Nikotinas

Žr. Sveikata, Elgesys, Rūkymas

Nikotinas, C10H14N2




Research suggests that, when smokers wish to achieve a stimulating effect, they take short quick puffs, which produce a low level of blood nicotine.[52] This stimulates nerve transmission. When they wish to relax, they take deep puffs, which produce a high level of blood nicotine, which depresses the passage of nerve impulses, producing a mild sedative effect. At low doses, nicotine potently enhances the actions of norepinephrine and dopamine in the brain, causing a drug effect typical of those of psychostimulants. At higher doses, nicotine enhances the effect of serotonin and opiate activity, producing a calming, pain-killing effect. Nicotine is unique in comparison to most drugs, as its profile changes from stimulant to sedative/pain killer in increasing dosages and use.

Technically, nicotine is not significantly addictive, as nicotine administered alone does not produce significant reinforcing properties.[53] However, after coadministration with an MAOI, such as those found in tobacco, nicotine produces significant behavioral sensitization, a measure of addiction potential.

Parsiųstas iš http://www.ms.lt/sodas/Mintys/Nikotinas
Puslapis paskutinį kartą pakeistas 2012 liepos 18 d., 15:03