It is generally assumed that therapeutic (0.5-10mg), moderate (10-20mg) and high (20-60mg) doses of loperamide are considered safe. I see no reason to think this would not be the case. What I think find more interesting is extremely high doses (60-250mg).
I have little reason to consider such extremely high dosages, when treated in a responsible, mature manner, to pose any significant risk to their users. Certainly I would not encourage people across the board to run out and down 200mg of loperamide. This would be extremely irresponsible, antithetical to harm reduction. But I don't find the situation, with this or really any drug, to be black and white.
Is an extremely high dose safe? Probably not. But do the potential advantages of taking such a high dose outweigh the potential disadvantages? In my case they certainly do. This is basically the thesis of my long fucking post here.
First, for the records:
we don't know for a matter of fact whether high dosages of loperamide, especially when only taken once of twice and not over a short period of time, causes any such severe life threatening negative side effects across the board, for all people
Myself and many others have taken dosages of loperamide between 80-250mg and have suffered no negative effects to speak of whatsoever. In fact I do not know of anyone who has (although I'm sure they exist somewhere, as I don't know of any drug that has escaped causing someone, somewhere problems of some kind). I also have been diagnosed with "retained poop" (yes, lol that is the medical terminology) and, even then, have been able to take doses of 200mg+ and still being able to shit normally with 12-36hrs.
Is it safe to take such dosages of loperamide (or an extreme dose of any otc, prescription or illegal drug)? Probably not. Certainly not as safe as taking therapeutic dosages or better know opiods at lower levels. But is taking 400mg of oxycodone safe? ...
However, to say that it is without a doubt going to cause serious life threatening symptoms for people across the board is almost as immature and incorrect as saying it is safe beyond a doubt. Both narrow minded gross generalizations.
Chances are, as opioids will be opioids, my loperamide use (high doses, having taken no more than four of five times over the course of my life) will never cause me any problems to speak of. To this day at least they have not caused ANY negative side effects what-so-ever.
Again, to say that 200mg of loperamide is SAFE is just about as stupid as saying that such doses will more likely than not cause life threatening symptoms. Again, chances are, if you are an opioid dependent you won't have any problems whatsoever - but this does not meaning doing such is absolutely safe, even for all opioid dependents.
Like any drug (ab)use, especially recreational, there is a cost/benefit analysis to be made by the user.
One must also take in one's history of medical conditions and drug use: i.e. I am on suboxone and have a rather high tolerance to all commonly (ab)used opioids thanks to a heroin addiction; I have no history of Parkinson's in my family, but I do have the GI issues referred to as "retained poop" (although my tolerance to opioids generally is what caused me, in my opinion, not to suffer any constipation or GI issues when taking huge doses of loperamide).
After taking my medial/drug history into account, I can make the following analysis: Given that I enjoy the effects of loperamide's high, the fact it's legal and that under certain situations I find an opioid with a half life as long as loperamide's useful, I have come to the conclusion that:
In certain situations I find the potential benefits of taking an extremely high (80mg-250mg) dose of loperamide to significantly outweigh the potential harm that might be caused by such (ab)use.
But that's me. Although I can think of more than a handful of people that seem to agree with me, I can't speak for you.
Oh, and btw, this, my friends, is what harm reduction is all about. GREAT thread! I'd like to briefly recognize and thank all the contributors and the OP 