yes it happens because you build a tolerance.
It depends on the drug you are abusing. Marijuana has no affect whereas a drug like heroin affects it negatively.
In the UK, heroin is a class A drug.
Heroin effects you faster when injecting because as soon as the heroin hits your bloodstream, it rushes throughout your entire body and vessels. This is often called a heroin "rush" and is usually why people repeatedly inject the drug.
Heroin is an opiate.
No, Methadone will not hide heroin on a drug test.
Heroin is a narcotic drug, not a demon.
Either heroin, or cocaine.
Heroin
heroin is a semi-synthetic drug, ive just done about it in my drugs and toxicology module at uni
No. Heroin is an opiate whereas amphetamine is a stimulant. These substance have very different effects and chemical structures.
Yes
DRUGS.