Drug holiday over, today I started taking Letrozole again. At night this time. Don't know that it will make any difference but worth a try. If/when (she said optimistically) the side effects return...
I buy 20kg bags of Epsom salts from the rural supply store for $15. It's a bit coarser than the supermarket version, but exactly the same chemical. In the bath, on the garden....bargain.