system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: If the medicine in Epi-Pens degrades when exposed to light, then why is the container clear and not opaque?
gpt
The medicine itself needs to be clearly visible to the user. If it gets cloudy, or has suspended particles, it should no longer be used and just discarded. The risk of using a bad medicine is larger as it may not be effective in a life threatening situation. Thus, clear containers instead of opaque.