The poster specifically states that the OP did not say her son “nearly died”
The poster specifically states "The OP has not mentioned that he overdosed or that he nearly died." She did say he nearly died, okay. She didn't say he overdosed. That's what I was disagreeing about.
An “overdose” would suggest that there is a “safe” dosage
when it comes to ecstasy there is no “safe” dosage so the very concept of an “overdose” is irrelevant.
a single tablet is an overdose.
There is no universally safe dose of any drug. There are doses at which the number of people gaining benefit (or, in the case of recreational drugs, a pleasurable effect) greatly exceeds the number experiencing adverse effects. But there isn't a dose of any drug that doesn't cause adverse effects in anyone. Well, not until you get down to homeopathic doses, anyway.
Thousands of people take MDMA (ecstasy) without suffering ill-effects. Just like thousands or millions take appropriately prescribed drugs without ill-effects. But in either case, some people will suffer ill-effects. This becomes much more likely if they take a very high dose (i.e. an overdose).
By your definition, any amount of alcohol, caffeine, cosmetic botox, etc., would be an overdose, regardless of whether it caused any ill-effects.