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.