Letrozole - is there anything I can take to ease the pains in my joints while taking letrazole ?

I'm sorry you are hurting :( I did look it up as I have have never took this and again I'm sorry you have to, it sounds like its more trouble than its worth.
It said this medication is indicated for breast cancer type medical conditions (aftercare) and other conditions.. Is this why you take it? I haven't viewed your profile. This information below was googled searched the medication plus relief from symptoms.. I wish you the very very best with your health and hope this helps a bit.

Managing bone or joint pain

If you have bone or joint pain, talk to your doctor. If your bone pain is due to a specific breast cancer treatment, you may be able to switch to a different chemotherapy or hormonal therapy that may ease your pain.

Medicines, such as naproxen and ibuprofen, are available to help manage bone and joint pain.

Some complementary and holistic medicine techniques have been shown to ease bone pain, including:

acupuncture

chiropractic therapy

hypnosis

massage

music therapy

Reiki

Shiatsu

Other tips for managing bone/joint pain:

Hot or cold packs,or a combination of the two, can soothe sore areas. Heat can help reduce muscle spasms and cold can help reduce inflammation.

Eat a healthy diet that includes enough calcium and vitamin D to keep your bones as strong as they can be.

Maintain a healthy weight to ease stress and strain on your joints.

Exercise regularly. Exercise keeps your bones strong and helps your joints stay flexible.