Yup, I was honest (and kind of surprised that nobody gave me a lecture about it, to be honest).
One doctor did ask me to not drink for a month before running bloods to see if I felt any better and if it affected the muscle enzymes.
Neither improved, unfortunately. Also none of my medical testing has ever pointed to anything obviously caused by alcohol (ie liver enzymes, etc, have always been normal).
This is probably an impossible question to answer, but how long is long?