Adhd meds causing inflamed joints and pain or just plain on peri?

One never knows at this stage amiright? I'm 46, on HRT and generally feel good in my body (active, weight lifting 4x per week, eat healthy, don't drink). I've been off work, so didn't need my Ritalin but now that I'm working again, I've been taking half a dose a day for a week. Now my body is aching all over, my joints hurt, I went to the gym and tried to do my usual circuit training but couldn't continue, I was in so much pain. This has never happened to me, so am I just getting old or could it be related to the adhd meds maybe? Or just good ole perimenopause? Just wondering if anyone else has experienced this before. We need some studies of perimenopausal women with ADHD in perimenopause! TIA :)