tom and jerry smoking a cigarette GIF by David Firth Tom and jerry: this scene
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But both of these claims come from studies in lab-grown cells
Withdrawal symptoms might include: Increased appetite

(1996): Inhibition of monoamine oxidase B in the brains of smokers

You might need to stop smoking or cut down on alcohol or over-the-counter painkillers

(2007) found that smoke produced from burning plant-based biomass contains particulate matter and respiratory irritants that may affect lung health depending on exposure conditions and duration, showing why tobacco-free herbal smoke cannot automatically be considered risk-free
doi:10.1097/HRP.0000000000000303 Jacobus, J., & Tapert, S