[PastaMonster]

Well, they lose effectiveness. The body adjusts to the constant input. Which is what addiction is. What many people don't understand is that addiction isn't drug abuse. We should fight to remove the negativity the word addiction have.

Very annoying that the body do this. If you could figure out a drug that prevents this you could make billions!

For example and something everyone can try: My body is addicted to coffee. If I don't take it for a few days I'll become very tired, headaches, etc. It's lasts for about two weeks. While addicted I don't abuse it. I've even switched to tea a few times.