It might be a good idea to check with your doctor @Andij. I am on a similar drug, another aromotase inhibitor, Femara (Letrozole). Last year I had a break from it while on an overseas holiday at the suggestion of my oncologist. I had no withdrawal symptoms, just an instant relief from the joint pain. Are you stopping it under consultation with your oncologist? If you are having trouble with side effects then your doctor would be the best person to discuss this with. There are things that can help or alternative drugs too. I had a lot of trouble with Femara in the first 12 months or so but have found solutions to most things now.