So, to roundup, I'm not sure what is causing my "head" problems, but I'm pretty sure it's the Simvastatin that's giving me the cramps, muscle spasms and aches.
Sorry I've had to cut and paste, this is from the US FDA website, hopefully a reliable source. The memory thing and brain fog is terribly irritating, especially when so many people patronise you by saying "it's your age", Jackonory it's my age. If you look further into the memory - brain fog thing there is plenty of anecdotal evidence where some people have really big problems with memory and brain fog, not just inconvenient stuff.
Reports of Memory Loss
FDA has been investigating reports of cognitive impairment from statin use for several years. The agency has reviewed databases that record reports of bad reactions to drugs and statin clinical trials that included assessments of cognitive function.
The reports about memory loss, forgetfulness and confusion span all statin products and all age groups. Egan says these experiences are rare but that those affected often report feeling “fuzzy” or unfocused in their thinking.
In general, the symptoms were not serious and were reversible within a few weeks after the patient stopped using the statin. Some people affected in this way had been taking the medicine for a day; others had been taking it for years.
What should patients do if they fear that statin use could be clouding their thinking? “Talk to your health care professional,” Egan says. “Don’t stop taking the medication; the consequences to your heart could be far greater.”
The Risk of Diabetes
Diabetes occurs because of defects in the body’s ability to produce or use insulin—a hormone needed to convert food into energy. If the pancreas doesn't make enough insulin or if cells do not respond appropriately to insulin, blood sugar levels in the blood get too high, which can lead to serious health problems.
A small increased risk of raised blood sugar levels and the development of Type 2 diabetes have been reported with the use of statins.
“Clearly we think that the heart benefit of statins outweighs this small increased risk,” says Egan. But what this means for patients taking statins and the health care professionals prescribing them is that blood-sugar levels may need to be assessed after instituting statin therapy,” she says.