The short term effects could be:
Bad breath.
Bad taste in mouth.
Smelly hair and clothes.
Yellow and brown stains on teeth.
Lost athletic ability.
Damage to the respiratory system.
Addiction to nicotine.
Risk of other drug use.
Decreased lung capacity.
Limited lung growth and function if used in youth.
Elevated heart rate.
Chronic cough.
Increased incidence of bronchitis.
Increased incidence of asthma and more severe asthma.