Rotator cuff injury symptoms and conditions

I have been on Prednisone for 3 months for PMR (polymyalgia rheumatica)and so far the pros have far outweighed the cons. PMR is an extremely painful condition that affects the shoulders and hips especially at night and early morning, I spent all of December and January sitting upright in a chair trying to sleep, untill I was diagnosed and prescribed Prednisone and oxycodone. I started at 25 mg and I'm now down to 15mg. The side effects that I do have are weight gain (about 10 pounds), mild mood swings and insomnia.I am an avid bicycle rider (25-35 training miles per day on week days a lot more over the weekend),I am 60 years old and now back on the bike. The strange thing is after about one month back in training I am much stronger this year than last even with the added weight. Last year, a solo, 30 mile hard ride I would average about 17 mph this week I went out on my same training ride at 19.4 mph, over 2 mph faster. Everything I read about Prednisone says that it wastes muscles,but I have become stronger. Is it possible that it's the Prednisone?

Who would think an antibiotic would have such effects? I have been experienceing pain in my shoulder for about 3 weeks. This began less than 2 weeks after taking Levaquin for 2 weeks. In addition to that, I experienced side effects during the treatment. This include chest pressure and rapid heartbeat.

Yesterday, I saw an orthpaedist who diagnosed me with a rotator cuff injury.
I have one month of physical therapy to endure 3x per week now. If the pain doesn't improve in 2 weeks, then an MRI will be done. If it is ruptured, there will likely be surgery.

I am a healthy 35 year old woman with no history of shoulder problems. The doctor and others have asked what did I do to hurt myself. My answer is that I made the mistake of taking a drug that shouldn't be on the market. I don't lift weights and I didn't pitch 9 innings before this. So the only connection is a drug whose website states "ruptures of the shoulder, hands, and Achilles tendons have been reported...".

I have woarned all of my friends and co-workers about this drug. I am now on a crusade to prevent others from falling victim to this drug. I understand that the risks to the few outwiegh the rewards to many. However, when you are one of the few who is affected, your viewpoint changes. I am an educated woman and did read the side affects prior to taking the drug. I knew this was a possibility but it was "rare". Who knew an antibiotic could be so helpful and harmful at the same time!

I have been taking Lipitor for the past 6 years without I thought any problems. I now have pain in my left shoulder that feels like a rotator cuff injury. Doc sent me for an X-Ray
which showed no abnormality. He then wanted to send me to
an Orthopedic dr for an MRI which I didn't do. I just had my
blood work done for the 6 month check and it revealed tha I
was anemic. He referred me to a hematologist to check
further. His preliminary diagnosis is multiple myeloma. I have lower back pain along with pain just under my rib cage
on my left side. I have felt all along the problem is from the Lipitor, but the doctors don't think so. How does this pain take to clear up. I have been off the Lipitor for nearly 3 weeks with no change. If anyone else has had this pleas let me know asap.
Thanks