Lots of drugs are controlled by the law.
It is illegal to use, possess or supply certain drugs, including ones that haven’t been prescribed to you.
Possession of cannabis is still a criminal offence. You will be committing a crime simply by having prohibited drugs in your house.
The police can search anyone (and their vehicles) if they believe they have illegal drugs. This must be a reasonable belief, not one just based on prejudice.
Glue and other solvents are not illegal substances but a shopkeeper may be committing an offence by selling them to you, knowing or having reasonable cause to believe, that you may misuse them.
A person convicted of possession or supply of drugs faces the risk of a prison sentence.
If you use, or are thinking about using illegal drugs, there are a many things you need to consider. There is plenty of advice online to support you.