There are four substance-related conditions recognized by experts. They are substance intoxication, substance withdrawal, substance abuse, and substance dependence. There are different criteria for each of these conditions. Also, these circumstances are seen in the context of the substances most frequently linked to them. These substances can be grouped in the following categories:

• Central nervous system depressants which includes alcohol, barbiturates,

benzodiazepines, and inhalants.

• Central nervous system stimulants which includes cocaine, amphetamines,

nicotine, and caffeine.

• Opioids which includes heroin and morphine.

• Hallucinogens and phencyclidine (PCP)

• Cannabis

Central nervous system depressants directly affect the central nervous system which produces the symptoms of depression and cognitive impairment. Central nervous system stimulants activate the central nervous system and the parts of the brain that registers pleasures. Opioids causes euphoria, lethargy, unconsciousness, and seizures and can be highly addictive. The experiencing of perceptual illusions and distortions ad symptoms ranging from a sense of peace and tranquility to feelings of unreality and violence are the possible effects of taking in hallucinogens and phencyclidine (PCP) . On the other hand, the feelings of being high, impairments on cognitive and motor skills, and sometimes, experience of hallucination are the effects of taking in cannabis. Intoxication, withdrawal, abuse, and dependence can occur with most, although not all, of these substances.

Although they rarely lead to substance-related-disorders, there are many other substances used for intoxicating effects . Muscle relaxants, nonsteroidal anti-inflammatory medications, antidepressant medications, lead, rat poisons with strychnine, pesticides, nerve gas, antifreeze, carbon monoxide, and carbon dioxide are some example of these substances. There are some people who might experience significant problems in cognition and mood, anxiety, hallucinations, delusions, and seizures when taking in these substances although mostly, these kind of substances gives no psychoactive effects or only mild and transient effects. A diagnosis of other substance-related disorder are given to these people.

Whenever one happens to know someone who is intoxicated, one should readily be wary. Intoxication is already alarming because if not quickly attended to can lead withdrawal, abuse, or much worse, dependence. However, when circumstances happen that intoxication has not been attended to and has lead to abuse and dependence, there is drug rehab to help you deal with it.

In order for a drug addicted individual to function well again, drug rehab is the process of assisting someone to improve and recover from drug addiction. Whenever drug addiction is present, drug rehab is one of the most important processes to consider. In order to help drug addicted individuals, drug rehab is really very useful. Drug abusers and drug dependents can be helped by the different methods of drug rehab. In order to do the helping, drug rehab uses different techniques. One can get a dose of drug rehab help in many places. There is your local and medical psychiatric societies where one can consult. One can also visit one’s university medical affiliated programs which are often hospital affiliated. In one’s search for drug rehab, there are much better ways in order to help an individual. Health maintenance organizations are one of the places where one can join. In a health maintenance organization, one has access to different specialist by paying a monthly price compared to paying a per service fee. One will have the assurance whenever things will go wrong.

Knowing substance-related disorders and drug rehab is important to battle the negative consequences brought by the misuse of some substances.