Why do pharmaceuticals have half lives, while most other things we interact with don’t?

Question

EDIT: …Well I messed this thread up. I wasn’t referring to biological half life, but sitting-on-your-shelf half life. (i.e. expiry)

In: 0

Answer 1

Pharmaceuticals have half-lives because they are designed to be slowly released into the body over a period of time. This allows the body to slowly absorb the drug and reduces the risk of side effects. Most other things we interact with don’t have half-lives because they are not designed to be slowly released into the body.