In the following chart, be aware that the major effects, symptoms of overdose, possible effects of withdrawal, and acute and chronic effects are only potential characteristics of the noted drugs; moreover, the characteristics may not in fact apply to all drugs within the corresponding drug category.

• opium
• codeine
• morphine
• heroin (“smack,” “horse”)
• Vicodin
• Dilaudid
• Percodan
• methadone
• Darvon
• Demerol
• Talwin

• suppression of pain
• constipation
• euphoria
• sedation
• constricted pupils

• slow breathing rate
• decreased blood pressure
• decreased pulse rate
• decreased temperature
• decreased reflexes
• drowsiness
• loss of consciousness
• flushing and itching
• abdominal pain
• nausea
• vomiting

• runny eyes and nose
• restlessness
• goose bumps
• sweating
• muscle cramps or aching
• nausea
• vomiting
• diarrhea
• drug craving

• death from overdose from injecting opioids
• criminal activity
• prostitution
• malnutrition