system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why is marijuana "impossible" to overdose on?

Edit: totally forgot I posted this last night.  For the first time in probably 6 months I was not on reddit during work hours... fml

Thanks for the answers and upvotes everyone!
gpt
Bluntly put, the median lethal dose (LD50) of THC (the active ingredient in marijuana) is so high and the methods of intake so dilute that you would have to do absolutely impossible feats to have it occur.  While there are a couple of different and conflicting sources, one estimate placed it at 40,000 times as much as the dose needed to get high.  This is contrasted with alcohol, where five to ten times the amounted needed to get you drunk can kill you.  To extrapolate, With pot brownies you'd die of sugar poisoning long before the THC got you.  With smoking, you'd have to smoke something like 1,500 pounds of weed in a period of 15 minutes.

To actually manage a THC overdose you'd have to spend a lot of effort to first purify a sizable quantity of THC and then ingest it rapidly.  This would never happen accidentally.