Good question. I'm tagging @tassieb, who also took Zoladex and may be able to share his experiences with tiredness and weakness. @sannira@ken82@jap57@john57 and @dmadi61 took a different hormonal therapy drug, Lupron, but may also wish to weigh in.
@bodeygolfer, when did you finish taking Zoladex? What changes have you had to make to cope with the tiredness? Can you still golf 18 holes?