“Exceedingly,” no, as oxymetholone itself has been used medically at 300 mg/day, with 150 mg/day having been pretty common, and these doses having been considered medically acceptable for treatment of anemia and of leukemic reticuloendotheliosis.
But, it is not something I would at all recommend doing for extended periods of time, nor for more than a fraction of the weeks of the year. Half the weeks of the year would be as far as I’d push it, that being for an aggressive sort of steroid user, or one-third for someone preferring a more moderate, yet still potentially tremendously effective approach.
It does seem to me that the real danger to the liver with the methylated androgens is how extended the use is, not really how much the dose per day is. Doses of some 17-alkylateds such as methyltestosterone have caused liver problems at as low as 5 mg/day when used chronically – that is to say, month in month out, year in year out, as part of an ongoing therapy.
In contrast neither medically nor from any user have I ever learned of a lasting problem, as opposed to transient blood values, from periods of use of only a few weeks, six or less.
Perhaps, as speculation, this is due to the liver being the fastest and best-healing of all the organs. Perhaps the situation is that if it isn’t pushed too far in the first place and then gets the chance to recover – a period of non-exposure – it does fine; but if the insult is continuous even if low, then it never gets a fair chance and slowly worsens in an ever-downward trend. That’s not proven, it just seems like a possible explanation.
However all this said I don’t at all think this stack is a preferred way to go. If nothing else, oxandrolone is very expensive and does nothing trenbolone won’t do at the same or even slightly lesser dose, nor anything that Primo won’t do at maybe 3 or 4 times the dose. And even though the principal thing is the duration of use, it does make sense that for the same duration, less total alkylateds must be easier, though being easier than “easy enough” may not be important.
The reason I did it was out of scientific interest, not that I thought it was an optimal stack for any practical reason. The only extent to which I have followed up on it is in using oxandrolone as a supplement in the last three days of a brief cycle, as replacement for the dwindling amount of injectable remaining. However, oral Primobolan will do the same.
As to substances that may help the liver with 17-alkylateds, there’s long been hopeful thinking that silymarin might help; it wasn’t till a couple of years ago that finally there is some evidence that it is of help at least when tested in rats. I tend to expect that having a ordinarily-healthy intake of antioxidants is also probably important, but taking excesses of antioxidants is probably no further help. I’ll post the silymarin study abstract, following.