Well, we do know in principle that pitavastatin has fewer DDI (Drug Drug Interactions) than other statins due in part to not being metabolized by P450 (CYP) enzymes, CYP3A4:
And one consequence of the CYP3A4 is that pitavastatin is not affected by GFJ compared to f.ex. the statin I’m taking right now, atorvastatin:
So if I’m taking a drug like rapamycin (which I will shortly), and would wish to enhance its action by suppressing CYP3A4 by any agent, f.ex. GFJ, I am much better off with pitavastatin than atorvastatin - so right there you have a use case for a drug that I am planning on taking.
Another situation, if I wanted to take colchicine (as some on this list do), I am better off taking pitavastatin than pretty much any other statin, because pitavastatin has zero interaction while other statins have very strongly elevated risk of muscle damage:
Another situation - I am going to take telmisartan because I have slightly elevated BP, and if that is not enough, I wil look to take amlodipine - and all calcium channel blockers (CCBs) have interactions with statins that are metabolized by CYP3A4, including atorvastatin which I’m taking right now - the result can be severe kidney damage:
Whereas if you take telmisartan, you might even find synergies with pitavastatin:
Anyhow, one other consideration is important - because of low DDI of pitavastatin compared to other statins, anyone taking appreciable number of supplements, the odds of interaction rises drastically, also in part due to P450 CYP3A4, sometimes you may not even be aware of it.
Finally, every individual is in a unique situation. I happen to struggle with excessive blood sugar, and am prediabetic. Many statins, including the one I am taking right now, atorvastatin elevate BS and can even lead to de novo diabetes. Additionally rapamycin (which I plan on taking) can also raise BS. These are not desirble effects. If I can therefore use a statin that does not have this additive blood sugar effect, then that’s a better statin for me. And that’s pitavastatin, which has been shown to not have any effect on blood sugar (unlike atorvastatin), and does not lead to de novo diabetes (studies I’ve linked to elsewhere).
All in all, I think pitavastatin is a better statin for my situation than the one I am currently taking, atorvastatin. I will soon have the opportunity to test whether I tolerate pitavastatin and whether it works to lower my LDL/ApoB, which it should according to the literature (as I’ll also be taking 4mg/day which is equivalent to 20mg/day of atorvastain, and currently I’m on 10mg/day atorvastatin which I’m tolerating very well).