I have noticed some deepening and changing of my voice while I was taking danocrine (danazol). Is this a common side effect?

Yes. Voice deepening is one of the known side effects of danocrine (danazol). If this side effect is severe or persistent, talk to your doctor. Tell your doctor immediately if: you have yellowing of the white part of your eyes, sever head aches, vomiting, vision problems, upset stomach that won't go away, or other signs that are upsetting and abnormal.