I can't think of a reason why TFT's should get tested prior to statin therapy.
Practice varies, sometimes the boxes on the blood form are ticked out of habit.
Yes, that's how the
NHS works.
Probably more important is the LFT test, but again practice varies.
Not heard of statin's affecting renal function, (other agents used to control risk factors such as ACE inhibitors could though.)
Perhap's we should not test as much, and use the money saved on subsidising oily fish and pre-school education, (which we know improves health).
And pour simvastatin in the water
