Official Libertarian dogma seems to head straight over a cliff pretty quickly. ...
There is no "official Libertarian dogma". As
I previously noted, libertarianism is a framework for analysis, not a specific set of views. Libertarians have wildly different views from each other on pretty much every topic.
Are there any republican or democrats who are against these [policies]?
This question is premised on a false trichotomy. "Democrat" is not logically inconsistent with "libertarian". "Republican" is not logically inconsistent with "libertarian". Libertarianism is a framework, not a political party. Many libertarians are nonpartisan, willing to evaluate each proposition on its own merits. Libertarian discourse typically consists of sophisticated and open-minded analysis, not blind adherence to the published positions of any particular political party.
I used to work with an ardent libertarian who tried to convince me that the FDA was unnecessary, because if any company started selling tainted pharmaceuticals, the magic of the Free Market would ensure that they go out of business once people start dying.
You are willfully misrepresenting how a free market alternative to regulators like the FDA would work. I express no view on the merits of such an idea, but it can't be intelligently discussed if you just argue against strawpersons and silly caricatures.
Under a free market system of drug regulation, the FDA or similar would still exist; the only difference is that it would be a private entity rather than backed by the force of the state. However, drug companies and drug stores would still essentially be required to participate in a regulatory system because no one would purchase drugs not approved by the regulator (unless they knowingly want to take their chances, similar to how they can already do so by purchasing drugs online). As far as I know, trademark law is generally accepted by libertarians and it could be used to enforce unique and prominent insignia that would visibly designate the drug as approved by the regulator.
Under current contract law, a private regulator would not have the power to apply penalties to violators in excess of actual damages because
contractual penalties are generally unenforceable at common law. This would be problematic because actual damages are likely insufficient to act as a deterrent against bad actors. Luckily, libertarians generally oppose the rule against penalties. Although it remains part of the law in most or all American and Canadian jurisdictions, the rule against penalties has been called "a blatant interference with freedom of contract".
Elsley v. JG Collins Ins Agencies,
[1978] 2 SCR 916, 937. I don't think many libertarians would support retaining that rule.
Another difference from the present system is that, most likely, there would be more than one regulator and they would compete for acceptance. An analysis of whether that is a good or bad thing is complicated. In fact, the entire issue is complicated. If you want to discuss it in earnest, that's one thing, but your posts display a distinct lack of curiosity. You seem more interested in declaring ideas to be silly without even understanding them.
Again, I express no view on the merits of free market drug regulation. As far as contemplated deregulation goes, I should imagine that that would far down on the list of possibilities. More obvious candidates for privatisation are entities that regulate and limit the practice of certain professions.