Yes, at 3,000iu my doctor said stop, do not go up to 4,000. Also did not advise to go all at once from 1,000 to 3,000 but take two weeks at 2,000 first.
Never thought a vitamin would be a complete treatment but provide your body with what it needs.

I take the 50000 dose too. Not prescribed for pain, definitely helped with fibrofof.

I have to take 50,000 IU Vit D weekly due to low levels but it does not help my pain.

I've been taking 50,000iu vitamin D for fifteen years. It seems to help with my depression., but no effect on pain

Hmmm.........I started taking Omega-3 by using inexpensive Fish Oil. At one point I was taking 3600/day (which the cardiologist said was just fine), but I decreased it to 2400/day since I eat fish regularly. I was prescribed the Fish oil to keep my cholesterol down, not for chronic pain. And then, I started taking Vitamin D for depression at 1000 iu/day. My doctor kept measuring my Vitamin D levels in my blood (which started out abnormally low) and I increased until by blood levels were in the normal range, which was 3000/day. Again, not for chronic pain. Omega-3 in Fish Oil and Vitamin D did nothing to relieve my chronic pain. But this much I know: An MD who runs an in-house Chronic Pain Treatment Center wrote a book on withdrawing from pain meds and instead using other ways to treat chronic. He recommends taking Omega-3 and Vitamin D. And he also recommends magnesium. And he recommends a lot of other things. I tried Everthing I could for my chronic pain and nothing worked for 45 years, until I was totally disabled. I was a shut-in for many years. But I have gone from constant, terrible, total body pain to just stiffness and little pain. My story is on my page. Oh, the name of the book is: The Chronic Pain Book.