Alcohol can cause psychological and physical dependence. Alcohol is particularly dangerous because it is constantly available. Consumption is widespread and often occurs regularly. Harmful use or abuse can be observed in many cases.

Alcohol addicts are unable to control their consumption permanently and in accordance with their wishes. Alcohol dependence is recognized as an illness under medical and social law, and it is almost impossible to overcome it without professional help. The costs of treatment are borne by health and pension insurance providers. The aim of treatment is usually complete abstinence.

Cannabis is a hemp plant with psychoactive substances that are consumed as an intoxicant in the form of hashish (dope, shit) or marijuana (weed).

The cannabis high intensifies the feelings and moods of the user - whether positive or negative. Undesirable effects often include impaired thinking, reduced concentration and attention as well as short-term memory. A reduced drive or a tendency towards passivity can also be observed.

The risks associated with cannabis use are primarily of a psychological nature and depend above all on whether it is a trial or occasional use or a permanent and habitual use. Personal and social risk factors are also important, with early onset of use (under the age of 16) being a decisive factor.

The symptoms of gambling addiction are often similar to those of substance-related addictions. They are characterized by thinking exclusively about gambling, "not being able to stop" and loss of control. As a result of the addiction, relationships and hobbies are neglected. Addictive crime is also possible.

Addictive gambling is defined as an impulse control disorder and a behavioral addiction in the sense of a mental disorder. Help is available in the form of outpatient individual and group therapy, inpatient stays and aftercare services as well as self-help groups.

The use of the Internet with its many possibilities has now become a matter of course. However, the topic of "pathological computer or internet use" has been increasingly discussed by the public and experts for years. The focus here is particularly on online computer games that are offered and played on the Internet.

Excessive computer and internet use is often referred to as "media addiction". Although it has not yet been recognized as a mental illness, comparable aspects based on the diagnostic criteria for substance-related addiction appear to be important.

The mere amount of time spent using the Internet is not a reliable criterion for pathological Internet use. Rather, it is important whether the demands of daily, social, professional or school life are neglected. It is also important whether the person concerned is unable to control the use of the medium.

After alcohol, tobacco is the second most frequently consumed substance in Germany that causes addiction. The potential to become addicted to tobacco is significantly higher. The number of tobacco addicts is also much higher than that of alcohol addicts. According to current estimates, 50 to 60 percent of smokers are addicted.

The health effects are the most important factor in addiction. After years of consumption, tobacco use is very likely to lead to serious illness and premature death.

The aim of addiction prevention is to reach young people while they are still experimenting in order to prevent them from developing a permanent smoking habit or even tobacco addiction.