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Below is a list of common symptoms for a variety of drugs. It is important to note that many drugs have the same symptoms and that this is not an all-inclusive list of symptoms. Any noticeable change in behavior can be a sign of potential drug abuse.
| Symptoms |
Potential Drugs |
| Aggressiveness |
Alcohol, Anabolic Steroids |
| Anxiety/Nervousness |
Amphetamines, Cocaine, PCP |
| Changes in physical appearances, increased masculinization |
Anabolic Steroids |
| Depression |
Alcohol, Barbiturates, LSD |
| Dilated pupils |
THC |
| Euphoria |
Cocaine, Opiates, Methadone, Propoxyphene, MDMA/Ecstasy |
| Flashbacks |
LSD |
| Increased appetite |
THC |
| Insensitivity to pain |
Opiates, PCP, Ketamine |
| Irritability |
Amphetamines, Cocaine |
| Lack of coordination |
THC, Alcohol, Barbiturates, Benzodiazepines, Methaqualone |
| Laughter |
THC, Alcohol |
| Long periods without rest or sleep |
Amphetamines, Cocaine |
| Loss of appetite |
Amphetamines, Cocaine |
| Mood-altering effects |
THC, PCP, Ketamine, LSD |
| Paranoia |
Cocaine, THC, PCP |
| Rapid speech, tremors |
Amphetamines, Cocaine, PCP |
| Relaxing or sedation of the body/drowsiness |
Opiates, Barbiturates, Benzodiazepines, Methadone, Methaqualone, Propoxyphene, GHB, Rohypnol, Ketamine |
| Tightness of muscles |
Amphetamines, Cocaine |
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