This was studied by the US Army in coordination with the FDA and was called the “Shelf Life Extension Program” or SLEP.
They classified the information so that the general public cannot see the results, but the 15 year conclusions got out before they pulled all access to the findings.
See their statement/warning/threat here:
There are probably several reasons for withholding the conclusions - number one being the pharma’s bottom line.
And even that bit of info about tetracycline causing renal failure if it was taken past expiration has never been studied. There was one case where a person died of renal failure and they found that he had taken expired tetracycline, but that is not a determinative cause/effect relationship.
I've read that the worst effect was stomach cramps and diarrea. Stop taking the tetracycline and both problems went away by themselves.
Tetracyclin is the only antibiotic that can actually hurt you when it goes past the expiration date. Cipro and Amoxacillin are two very good broad spectrum antibiotics to stock up on. You can purchase these drugs through the online Canadian Pharmacy without a prescription as well as some pain killers.
That's not an official military website if that was your intent in posting. Furthermore, clicking on one of the links brought up a security warning.........