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When tobacco smoke is inhaled, nicotine rapidly reaches the brain, where it binds to receptors that release dopamine, reinforcing the rewarding effects of nicotine - making us come back for more

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The thinking in clinical settings has been that asking patients to quit cigarette smoking while they try to stop using drugs is too difficult, or that smoking may be helpful in remaining abstinent from alcohol and drugs, but it is not related whether or not one remains abstinent from illicit drug use over the long term, said study leader Renee Goodwin

Smoking is associated with substantially higher risk of COVID-19 progression, study co-author Stanton Glantz, of the Center for Tobacco Control Research and Education at UCSF, told HealthDay News