Dear Molly98, The symptoms you describe, although uncommon, can be related to tamoxifen, and would need to be evaluated in context of your overall clinical situation. You would want to be sure to discuss your symptoms with your doctor who can evaluate. The website chemocare.com (www.chemocare.com) has information that may be helpful to you regarding management of side effects. You can look at the specific side effects and find information and general suggestions about managing side effects such as muscle aches, tingling etc.