I was prescribed simvastatin by my GP a few years ago. Within a month I felt desperately ill - pains everywhere, especially in my arms and chest. I got my GP's standard response to most conditions - "come back next month if you don't feel any better - next!". A week later - feeling even worse - I went in to find he was on holiday and a lady locum was on duty. She virtually leapt out of her seat, examined me thoroughly and asked if I'd taken that day's dose - I hadn't as I took it in the evenings. She told me to take no more, and handed me a prescription for Ezetemibe which I've taken ever since with no side effects. I haven't a clue if it's effective, as getting info from my GP is like getting blood out of a stone. The diabetic clinic nurse is a bit more forthcoming and confirmed later most of my numbers were pretty good.
I'm 67 and have never ever trusted doctors - not prejudice, just lifelong and often disastrous experience, one after another, often it seems interminable. That experience has taught me the the medical professions have more fads and fancies than the fashion industry, and while there are many dedicated professionals around, many are time-servers doing the least work for the most money. Uncannily I seem to have spent my life encountering the latter - so if they are a minority I must have been unusually unfortunate.
These days, the system is aided and abetted (happily not always to the patient's disadvantage) by unfortunate 'Practice Nurses' charged - in reality if not in theory - simply with keeping patients away from HM The Doctor. In my local health centre there's ONE harassed Practice Nurse charged with half a dozen disciplines - while GPs on a huge multiple of her salary work rather less than office hours.
And don't blame your Practice Nurse too much for her 'ignorance' people. Mine admitted to me once (socially, outside her work) that the NHS has a 'Party line' on most things these days and it's more than any nurse's job is worth to challenge the system, whatever their own knowledge and experience. That such dedicated professionals are now rapidly being outnumbered by those who never dream of rocking the boat is perhaps a bigger problem than who takes what drugs.