Final answer:
The nurse should inform the client that venous thromboembolism can develop as a side effect of taking tamoxifen for the treatment of breast cancer.
Step-by-step explanation:
The nurse should inform the client that venous thromboembolism can develop as a side effect of taking tamoxifen for the treatment of breast cancer. Venous thromboembolism refers to the formation of blood clots in the veins, which can lead to serious complications such as deep vein thrombosis or pulmonary embolism.
It is important for the nurse to educate the client about the signs and symptoms of venous thromboembolism, such as swelling, pain, or redness in the affected limb. The nurse should also emphasize the importance of seeking immediate medical attention if any of these symptoms occur.