Alcohol


Effects:
Addiction (alcoholism)
Dizziness
Slurred speech
Disturbed Sleep
Nausea
Vomiting
Hangovers
Impaired motor skills
Violent behavior
Impaired learning
Fetal alcohol syndrome
Respiratory depression and death (high doses)
Cirrhosis and cancer of the liver
Excessive drinking can lead to decrease testosterone in a man's body and cause impotence
 

Tobacco

Effects:
Addiction
Heart and cardiovascular disease
Cancer of the lung, larynx, esophagus, bladder, pancreas, kidney, and mouth
Emphysema and chronic bronchitis
Spontaneous abortion, preterm delivery, and low birth weight
Diminished or extinguished sense of smell and taste
Frequent colds
Smoker's cough
Gastric ulcers
Premature and more abundant face wrinkles
Stroke