I have a virus with 1 symptom: excruciating body aches. my doctor prescribed a stronger painkiller (ibuprofen 800mg), but even that doesn't help much.

Viruses stink!: As long as it helps some and the virus is being treated as well as possible (non-symptomatic only) this might be as good as appropriate. I don't know anyone who feels good during a virus - not terrible, if they're lucky but not good. Use heat/cool, gentle comforts (food, activities) to find your best feelings. Drink water, rest, relax, entertain yourself as well as you can. Best!