What is imperative is that I tell you that if by any chance you're taking statins, whether it's a strain or a tear, or indeed any pervasive tendon or muscle pain, it's a warning to stop taking them before you get rhabdomyolysis, which can kill you.
I had the good fortune to be told of that by my physio. This was treated with great scepticism by GP, cardio, and the surgeon who wanted to operate on both my shoulders before the tendons tore right through and I lost the use of my arms, as he had determined by MRI that the tears were being caused by osteophytes, or spikes of bone due to advanced generalized arthritis, and that it would only get worse as the existing tears were 'fish-mouth' tears which pull the tendons further apart. "I can get you out of this," he said, "but it'll be SORE!" (6mths recovery or so for each shoulder in turn.) He said the tendons would have to be sewn up (with only a 60% success rate!) and the ends of the bones of the acromioclavicular joints cut clean out to stop it happening again.
This was pretty convincing and alarming stuff, and before I would go ahead with it I defied the lot of them and stopped the statins. The pain level started decreasing almost immediately, and I am sufficiently improved not to contemplate any open surgery until I am sure I merit it. Which will be never if my estimate of my life expectancy is anything to go by.
The surgeon now suggests that patients on statins try coming off them first (which is very big of him considering how gung-ho he was about operating on me!) and those that did come off them have uniformly improved.
The pharma monopolists are pushing this expensive drug like the bloody Opium Wars.