Hello Marjen
I was on femara for 4 months and then the claw hands started. Pills diddn't take the pain away so I stopped the Femara. I sleep each night with wrist splints on. This allows me to sleep at night and there is slight discomfort in the morning. One year later I still struggle with fine motor skills like doing up my bras and doing up necklaces. The cold weather aggravates the condition.
I decided not to take painkillers etc longterm because I haven't found them to be helpful. I recommend the wrist splints when sleeping. At least I get my sleep! My hands hurt when I am driving too.