Ads from Google:

Google ad
End of ad
Google Adsense ad
End of ads.

Negative Effects Marijuana/Cannabis/Haschish

Abstract: Long term use of cannabis (marijuana, haschish) can increase negative feelings, can lead to dangerous driving, can cause cancer, and more.

Web4Health logo
psychologist Independent medical expert answers on psychiatry and psychology

Negative Effects Marijuana/Cannabis/Haschish

Intelligent natural language question-answering in the area of psychology and psychiatry. Ask a simple question  Local help Info

Go the top of the page Top Forum iconDiscuss this Forum iconGet expert advice Printer Print
Written by: Wendy Moelker, Psychologist in charge, tutor, Emergis center for mental health care, Goes, the Netherlands.
First version: 22 Jul 2008.
Latest revision: 17 Aug 2015.

What are the negative effects of long-term use of cannabis/hashish/marijuana?


Smoking one or more joints a day during a year or longer is considered long-term use. However, this varies from researcher to researcher.

The health risks of this long-term use are:

  • In some cases high quantity users can experience feelings of anxiety, depression and be seriously unwell.
  • Cannabis influences driving ability.
  • Smoking cannabis causes carcinogens to enter the body.
  • During pregnancy, cannabis can have negative consequences for the fetus.
  • Long-term use of cannabis may affect thinking, emotions and feelings.
  • In some cases, long-term use of cannabis can lead to dependence and abuse.
  • Cannabis can provoke a psychosis in people who are sensitive to it. More.

Some researchers are of the opinion that:

  • Cannabis is a first step to the use of hard drugs.
  • Cannabis has negative effects on the immune system.
  • Cannabis influences fertility.
  • Cannabis causes schizophrenia. More.
  • Cannabis leads to apathy and loss of interest.
  • Cannabis can cause anger, especially when trying to stop using Cananabis.

However, these statements have not been proven.

Intelligent natural language question-answering in the area of psychology and psychiatry. Ask a simple question:
Local help Info
Google ad
End of ad
Disclaimer: The documents contained in this web site are presented for information purposes only. The material is in no way intended to replace professional medical care or attention by a qualified psychiatrist or psychotherapist. It can not and should not be used as a basis for diagnosis or choice of treatment. If you find anything wrong, please notify us at .
Go to top of page To top of page
Web4Health in other languages: Finnish German Greek Italian Polish Russian Swedish

add-cannabis-long-term Copyright 2003-2017 Web4Health
Copyright 2003-2017 Web4Health.
Web4Health was selected as finalist for the 2008 Stockholm Challenge Award
Translate Web4Health
We seek voluntary translators who are interested in translating Web4Health to new languages. We can provide the servers, and pay you 50 % of the income from ads on pages, which you have translated. We are especially interested in translators from German To English, From German, Swedish or English to French, Spanish, Italian, Greek, Finnish, Polish, Farsi, Russian.

Advertise here
Reach 300 000 visitors reading one million pages for a cost of 600 US $/month.