nicotine dependence and smoking cessation Flashcards
exam 2
nicotine receptor associated with addiction
alpha4-Beta2 nicotinic receptor
nicotine stimulates
CNS nAch receptors leading to dopamine relsease
nicotine half life is
short only baout 2 hours
smoking is a slow or rapid delivery
rapid
repeated use of nicotine leads to
increase tolerance
nicotine withdrawal symptoms
negative effects: insomnia , anxiety
why do smokers keep smoking?
- pharmacologic addiction
- psychological dependence on smoking
smoking rates has decreased ?
yass, but it is uneven in groups
secondhand smoke exposure in adults? what about children?
adults: lung cancer and CHD
children: SIDS, asthma, ear infections and slowed lung growth
quitting is beneficial?
yasssss of course!!!
- increased life expectancy
most benefit if quit early but it is never to late
tx. with evidence of efficacy
- pharmacotherapy
- behavioral counseling
- combination
pharmacologic tx.
- nicotine replacement
- bupropion
- varenicline
skin patch (nicotine replacement)
- long acting, slow onset
- fixed dose but constant leads to best compliance because of simple to use
oral or nasal (nicotine replacement)
- short-acting and faster onset
- user controls dose leading to more fluctuations of nicotine blood levels
varenicline-chantix
- binds selectively to alpha4-beta2 nicotinic receptor
- has a dual mechanism: partial agonist (reduce craving by stimulating receptor) and antagonist (blocks nicotine from binding)