Depending on how much is taken and the physical condition of the individual, alcohol can cause:
Slurred speech Drowsiness Vomiting Diarrhea Upset stomach Headaches Breathing difficulties Distorted vision and hearing Impaired judgment Decreased perception and coordination Unconsciousness Anemia (loss of red blood cells) Coma Blackouts (memory lapses, where the drinker cannot remember events that occurred while under the influence)