1- It's proven than several years after the expiration date, the drug remains its active ingredient in a high enough percentage to be fully usable.
As I said in the article, the most common is to find the excipients in a poor condition, but this not happen always in every expired date drug case.
It's logical to think that, for example, in the case of a hearthache, if you take an expired medicine with only a 50% of active ingredient, and you need 100% of active ingredient to counteract a heart attack, the you will have to take 2 pills.
If you had read my article would you know that the pharmacies take the expired medicines and pack them again estending its expiration date by five years more.

2- Only one case of intoxication by expired date has been found on file, and goes back to 1.963.

3- This article talks precisely about the fear that the pharmaceutical companies are trying to give to the population, just for getting rich.

4-I will not tell you what you have to believe or not, and although being careful is never a bad option, it is important to know that not everything the big companies say is true.