I’ve been taking Letrozole for over eight years and haven’t experienced drowsiness. I take it at night and as I suffer from insomnia, a bit of extra sleepiness wouldn’t go amiss! I’m a dedicated non-driver, so can’t advise on that. If you are experiencing a loss of feeling though, it’s worth getting it checked. Tingling, or pins and needles, is usually the first sign of PN but if you do have PN and it’s causing difficulty in holding things, you do need to let your oncologist know and see if there is anything you can do to lessen the effects (I found the suggestion of vitamin B helped a bit). Best wishes.
