I’m sorry you’re dealing with this. Not sleeping because of pain is exhausting, especially after already having four joint replacements.

Even though 5 mg is considered a low dose, people can respond differently to medications. Some people do well on a low dose, while others still notice muscle or joint aches. It’s good that you’ve already reached out to your doctor rather than just stopping the medication on your own.

In my own experience, my doctor had me do something I thought was really helpful when we were trying to figure out if a medication was causing side effects. He had me draw a simple stick person and mark where my pain was, date it, then put it away. After stopping the medication we suspected (under his guidance), I waited 30 days, drew another stick person, and compared the two. It helped us look for real changes instead of relying on memory.

I’ve also had a physician start me on rosuvastatin very gradually—5 mg just twice a week—and then slowly increase the frequency if I tolerated it. That approach may not be right for everyone, but it’s another conversation you could have with your doctor if the medication does turn out to be contributing to your symptoms.
Since your doctor prescribed it to help lower your cardiovascular risk, hopefully they can help determine whether the pain could be related to the rosuvastatin or if something else might be contributing.

While you’re waiting to hear back, when did the pain start in relation to beginning the rosuvastatin? Was it a noticeable change from your usual joint pain, or more of a worsening of what you already live with?