All drugs have an effect on your mental health. They affect the way that you behave, your mood and how you see things. These effects can be pleasant or unpleasant, short-lived or long-lasting, can go away or continue once the drug has worn off and they might even be similar to the symptoms you experience as part of a mental health problem. The way drugs may affect you can depend on a range of things: the type of drug, if it has been mixed with something else, how much you take, how often you take it, your mental state at the time you’re taking it etc. For some, taking drugs can lead to long-term mental health issues such as schizophrenia or depression.
The possible effects of some of the most commonly used drugs are listed below. Not everyone will experience all of them. The possibilities can become greater if you already have an existing mental health problem. However, it is possible to develop symptoms of a mental health problem even without any previous history.