The nicotine in tobacco is a stimulant, and it can make you feel temporarily more alert. In the long term, though, smoking drains your energy, making ordinary physical tasks like housework or climbing stairs tiring.
Try these tips to boost your energy instead:
Get enough rest. With a good night's sleep you're more likely to feel fresh and alert.
Exercise regularly to raise your overall energy level.
Take a brisk walk instead of smoking if you feel sluggish. Physical movement is a drug-free stimulant.
Eat regular, nutritious meals. Smaller meals spaced throughout the day are better than three large ones for keeping energy levels constant.
Drink plenty of fluid; water is best.
Boredom can make you feel dull and lethargic, so take regular breaks (just not smoke breaks) from tedious tasks.
Passive smoking can kill
Save yourself, quit smoking