Why not all drugs are able to effect the brain?

Answer 1

Drugs impact the brain because it causes abnormal growth which eventually forms tiny, almost mircroscopic little short hairy gnomes inside the oppicatal canal of the coccxy. This gnomes are very irritable but can be removed surgically. The gnomes will play padie wac on your pariential lobe. If you listen close enough you can hear the awsome reggie beat their banging out. After awhile the beat will infect your nerves, which becomes a pounding. Take two of theze and youll be fine.

Answer 2

Well... how many drugs are there? It also depends on what you mean by "Affects the Brain" Any drug that can pass through the blood brain barrier will "Affect the Brain" in some manner or another; however how that person percieves that affect depends on may factors including tolerance, drug interactions, individual brain chemistry, etc...

Answer 3

There are two reasons why not all drugs effect the brain. The first is that some drugs act in a manner that would not have a significant effect on the brain, ie acetaminophen.

Second, even if a drug binds to a receptor that is present in the brain, and would be expected to have a significant impact, not all drugs can enter the brain because of the blood-brain barrier, which keeps certain drugs out. For example, loperamide is an opioid (similar to methadone or morphine in its receptor binding) and thus would be expected to produce narcotic effects. However, this drug is commonly available and sold as diarrhea medicine because the blood-brain barrier keeps it from entering the brain. Thus, unless it is injected into the brain or the blood-brain barrier is compromised, this drug cannot affect the brain like morphine and thus it can only act in other areas of the body.

Answer 4

Every Drug has a very different effect on your brain, but most all have one in common. they raise your dopamine inhibitors.