Muscle tears symptoms and conditions

Taking Levaquin for pneumonia discovered through Xray as I had a nagging cough for a few weeks. Into 10th day of 14 day 500mg regimen and have had what feels like muscle tears in my calf muscle. First one happened after a weeks treatment during athletics and seemed to get much better in a few days. Second 'tear' happened today while walking. I can't really tell if these pains are muscle or tendon (achilles) but massage and heat helps. Sure am surprised to learn about all the side-effects from taking this drug and think I better end the treatment.

Any further info re cysteine / selenium depletion ? Also sources if possible.
Also, any info re muscle tension, fragility ?
I stopped Lisinopril earlier because of muscles tearing.
On taking it again, old muscle tears re-opened, forearm and back musles very tight.
Thank you.

I cannot stress too strongliy how opposed I am to the marketing of this drug. I took 3 of 5 prescribed doses
and was unable to eat or drink, felt anxious, spaced-out,
just weird.
I went to an E.R., because I didn't know what was
going on. It was a horrible experience, almost surreal,
and impossible to describe.
Today a friend of mine, who has muscle tears from it,
is having an incisional hernia repair.
AVOID LEVAQUIN!

I did not suspect Lipitor as the cause for my shoulder pain and rash on my leg. I've been taking Lipitor for couple of years and over time both my shoulders were so painful that the doctors (2) said I had inflammation and possible muscle tears. Put me on antiinflammatory pills and eventually gave me cortisone shots in both shoulders. During this time I continued to take Lipitor. I went on a 2 week vacation to Mexico and forgot to take the Lipitor with me and I didn't have a prescription to get more in Mexico (legally) so I did without. Magically during my second week without Lipitor, my pain started to subside in both shoulders and the rash eased up. I have been off Lipitor for 1 month now and my shoulders are almost back to normal and rash has stayed away. I am convinced it is the side effects from Lipitor. I encourage all to see their doctors regarding going on another form of Statin. I myself have started taking some liquid glucosamine (with condroitin, MSM, and Colegen) that I got at Costco, Vitamin E, and Fish Oil capsules. Not sure about my cholesterol but the pain is almost all gone and improving daily. Good luck to all who are dealing with the side effects of Lipitor. This is my theory and I'm sticking to it.