it depends. Addiction alters the chemicals that go in and out of the brain through the blood brain barrier. The brains of children, teenagers and young adults completely change or regenerate at several times during growth. If they are using during these times of regrowth the drugs can alter the new regeneration or growth. After the brain is fully developed the brain can be damaged and cells altered or killed completely as a side effect of the drug. This is why most of them are illegal
Brain
Your addiction changes the brain by altering its chemistry. A drug interferes with the natural processes of the brain. Because of this, it can cause the brain to become dependent on the drug to perform natural processes. This means if you stop taking the drug, the brains new set of natural processes get disrupted and that cause a craving, because the body and brain believe the need the drug to function properly; this causes an addiction.
The thing in your brain telling you that you need to be better than everyone
the liver, the brain, the heart and sometimes it can cause esophagus cancer.
to your lunges and brain cells physically. but also to your life.
No this is a habit that is hard to break it is not something like smoking or drinking where introduced chemicals interfere with the body.
Antibiotics aren't addictive so no they can't cause addiction.
The only addiction LSD can cause is psychological addiction, and even this is unusual.
It is more likely to leave the baby brain damaged or physically damaged.
Yes, any kind of addiction can cause a person to be angery.
Heroin
Yes. It can most definitely lead to and cause addiction to methamphetamine.