A patient taking danazol for endometriosis may experience which of the following adverse effects?

Danazol is a synthetic androgen that is often used to treat endometriosis due to its ability to suppress ovarian function and reduce estrogen production. One of the common adverse effects associated with danazol therapy is fluid retention, which can lead to edema. This occurs because danazol can influence the balance of hormones and fluid regulation in the body, resulting in swelling, especially in the extremities.

In addition to edema, danazol can cause other side effects, but they might not be predominant in all patients. Weight loss, hair loss, and insomnia are also possible side effects; however, they are less commonly highlighted compared to the risk of edema. The medication's androgenic properties can lead to various hormonal changes that may impact fluid balance more significantly, thus making edema a notable adverse effect for patients undergoing treatment with danazol for endometriosis.