I got no experience about the heart-related side effects (except for very minor ones one or two times), but I told you like 100 pages ago!!!1 (
) that minoxidil can be dangerous. I don't think that a one time systemic overdose can induce long term side effects.
On a related note, as more people are following this thread than my minoxidil thread: 4 months after dropping minoxidil I can see some definite improvements on my facial skin. If I had to give numbers, I'd say I'm about 35 to 40% recovered.
Around each of both eyes, two wrinkles that were "permanent" before (i.e., showing when not smiling, but always there even when face was relaxed) have significantly lost in size and depth (one of them actually being gone completely by now), or in other words, their noticability is greatly reduced. Black eye circles are still there but the color is way better, i.e. not as dark anymore. Forehead wrinkles are almost completely gone. What has not improved in any way though are the enlarged pores. They have unfortunately not subsided in any way. Also, the wrinkles when smiling are still quite deep, though not as long as before: when smiling two months ago, there'd be wrinkles going from the sides of my eyes down to my cheeks at mouth level; this length is now at the level of the middle of my nose.
And yes, I did confirm all of this by comparing photos. Took one today, and compared that to the one I took about 3 and a half months ago.
You can't believe how great I feel. I may be losing hair visibly since dropping minoxidil (lost almost everything I gained), but at least it seems like I'm getting my youthful looks back. Should I recover completely (as I recovered about 35 to 40% by now, I expect it to take another 4 to 6 moths if reovery is linear), which I certainly hope, I might start minoxidil again though at much lower doses. It did have some great effect on my hair, but the side effects were unbearable. I hope there's a dose for me where the positive effects pertain, but I get no negative side effects on my facial skin again.
One theory why I had both great results and those side effects is based on one of the studies posted here recently: minoxidil needs to be converted by an enzyme to bioactive minoxidil sulfate. Some people lack that enzyme and thus don't get any positive (or negative) effects from minoxidil at all. If I just got huge amounts of that enzyme, this would explain the results and side effects. Not only mine, but of all the other people that reported the same side effects as me.
Bottom line for those who are still wondering if they will ever recover from facial skin-related minoxidil side effects: Yes, you will. As of now I can't say if you will recover completely, but there will be at least some recovery.