It is possible (I don't know) that this could be a good thing to consider, or to possibly add to other treatment plans, but it would need the input of a medical professional. The high dose would be a temporary medicinal level meant for more effects, than taking any over-the-counter oral form, which I would NOT take ongoing high doses of those you buy yourself.
It is possible that even though it might have possible unwanted side effects, that the possible benefits might outweigh those.
Again, to be weighted out risks VS benefits, by or with a doctor.
Such as, because if you know you have the cancer, so it is sometimes worth trying something, even if it has a possible downside of some other unwanted result, but more important to take care of your most serious, present problem that you do have (if you do) and do not want to ignore.
Especially I would personally consider it, if my other options were very limited.