Please don't post flamebait, especially not flamebait tropes. And please don't take HN threads further into flamewar generally. This is entirely avoidable and should be avoided.
FDA approves particular formulations of drugs for particular uses, generally in the context of being prescribed by a medical professional who understands when the treatment is appropriate and what the correct dosage should be.
To the best of my knowledge it has not approved people randomly going down to the pet shop and chomping down on the horse dewormer just because they've chosen to eschew interventions that actually help but also don't want to get scarred lungs and/or die.
But you don't have to take my word for it. Here's what the FDA has to say on the subject:
