My mother had a breast cancer surgery 3 months ago and is now taking arimidex (anastrozole). she has lost about 2kg of weight. any problems?

Could be: Related and 2kg not a huge amount. She should follow up and be sure it is not metastatic disease . Continued weight loss is concerning.

Dr Ali agreed

Not yet: If it continues it would be a problem. Your mom has been through a lot and her appetite is probably not normal. She should keep an eye on it and make sure her doctor is aware of her weight.

Could be: After a major operation, it is not unusual to be in a catabolic state for a few weeks to months. Current weight loss is not concerning but if it continues, would be a concern. Assure that there is adequate protein intake, vitamin intake, and water intake. Use supplements if needed. Be sure to discuss with her surgeon and other treating physicians.

Dr Newman and another doctor agreed

Wt. loss & Arimidex (anastrozole): Arimidex (anastrozole) does not usually cause weight loss, unless your mother is having GI problems with it. Is she complaining of abdominal pain or nausea?