Opiate
A person on an opiate such as heroin or morphine will have: Constricted pupils that will look like pinpoints or small dots. Usually itches and you can see the person scratching himself. If the method of ingestion is sniffing, his nostrils may appear raw and red. If the method of ingestion is by injection there will be needle marks in arms, behind the knees or ankles. They may get very pale and sweaty or extremely thirsty. Opiates affect people in different ways: some may get very “Hyper” (active or frantic) and run around working or looking busy while others get very lethargic (nodding or doping off). The person may go around asking others for money. Use or possession of paraphernalia, including syringes, bent spoons, bottle caps, eye droppers, rubber tubing, cotton and needles. Slurred speech.

Cocaine, Crack & Amphetamines

• A person on cocaine or speed will usually have glassy eyes and very, very large pupils. He may try to hide this by wearing sunglasses or other dark glasses.
• His behavior will be erratic. He cannot relax and isrestless.
• 
  Addict injecting himself
  Stimulants speed up the body’s functions and the person may have trouble sitting still, remaining inactive or controlling his or her temper. For this reason, there may be long periods without sleeping. The body, quickened by the chemicals avoids sleep for extended sleep for extended periods of time. The person may exhibit this tendency of insomnia and then “Crash” and sleep for similarly long period of time.
• The person will tend to move fast and ramble or be non sequitur in his conversation–jumping from one topic to another.
• He of she will also experience “Cotton mouth” and may drink a lot of water to satiate thirst and constantly be licking his lips.
• He may constantly be sniffing despite the lack of a cold or allergies.
• The person might exhibit unexplainable changes in appetite or weight. Stimulants diminish the user’s appetite.
• If the person is injecting cocaine or stimulants you will probably be able to see fresh needle marks. He might try to hide these by wearing long–sleeved shirts, even in hot weather.
• Use or possession of paraphernalia including small spoons, razor blades, mirror, little bottles of white powder and plastic, glass or metal straws.

Marijuana

• People on marijuana, pot, hash or hash oil will have irritated eyes.
• They can walk around in a daze or euphoric stupor staring out into space or at nothing and may go into fits of laughter or laugh when there is nothing to laugh about.
• Marijuana has a strong, pungent, virtually unmistakable odor. It’s long lasting and difficult to mask.
• Sleepy or stuporous in the later stages.
• Forgetfulness in conversation.
• Tendency to drive slowly – below speed limit.
• Distorted sense of time passage – tendency to overestimate time intervals.
• Use or possession of paraphernalia including roach clip, packs of rolling papers, pipes or bongs.

LSD & Hallucinogens

• A person who has taken LSD or other psychedelics will manifest glassy eyes and have a blank, vacant stare.
• Often he appears to be daydreaming and needs to be spoken to several times before responding.
• He will be found to have inappropriate and extended interest in common objects. For example, examining an ashtray or a drawing for a long time, turning it, viewing it from different angles.
• The person may also have a similar interest in body parts, such as a finger, hand or food. Conversation tends to be esoteric, like a "head trip."
• He will hallucinate.
• He will experience anxiety for no apparent reason.
• They may have dilated pupils and may be inexplicably high–strung.

Depressants

• A person under the influence of depressants such as barbiturates or Valium may act intoxicated (slurred speech, stumbling gait, droopy eyes, etc).
• Depressants slow down the body’s functions, which my prompt unwarranted sleep episodes.
• There will be pronounced tendency to fall asleep in unusual situation such as at dinner and the person will show signs of overall listlessness.

A World of Crisis in Search of Solutions: By Clark Carr, President, Narconon International.

The author attended the Hope 2000 International Conference on HIV, Substance Abuse, Prevention and Control at the close of last year in India, where drug abuse is out of control and an estimated 10 milion men, women and children are HIV–positive.


Source: www.ilo.org