Bone loss and mood changes on ovarian suppression

Oestrogen does far more than control periods. It helps keep bones strong by slowing the natural breakdown of old bone, and it plays a part in brain chemistry that affects mood, sleep and concentration. When goserelin (Zoladex) or a similar medicine switches off the ovaries, oestrogen falls within weeks, and both bones and mood can feel the effect. Bone loss happens silently. You will not feel your bones thinning, but over months and years bone density can drop, and the fall tends to be greater when ovarian suppression is combined with an aromatase inhibitor, because that pushes oestrogen lower still. Over time this can raise the risk of osteoporosis and broken bones. For this reason, many teams arrange a bone density scan near the start of treatment and repeat it at intervals, and encourage exercise, calcium and vitamin D. Some women are also offered a bone-strengthening medicine. Mood changes are more noticeable. Irritability, anxiety, tearfulness and low mood are common in the first months, partly from the hormone change and partly from poor sleep, hot flushes and the weight of a cancer diagnosis. For some women this becomes depression, which is a treatable medical problem, not a personal failing. Both bone and mood changes are worth raising early, because there is a lot that can be done for each.

Bone loss is silent

It is found by scans, not symptoms, so regular checks matter more than waiting for a problem.

Mood changes are common and real

They are a known effect of sudden low oestrogen, and you do not need to cope with them alone.

Both can be helped

Exercise, bone medicines, talking therapies and sometimes antidepressants make a real difference.

Bone and mood effects differ a great deal between people, and it helps to be clear about the uncertainty.

Not everyone loses much bone

Starting bone density, age, body weight, diet and activity all affect how much bone is lost.

Bone medicines have their own effects

Zoledronic acid can cause flu-like symptoms after the first dose, and rarely both it and denosumab can affect the jawbone, so a dental check is often advised first.

Mood is shaped by many things

It is hard to separate the effect of low oestrogen from the stress of cancer, which is why support covers both.

What this page cannot tell you

It cannot tell you your own bone risk or whether you need a bone medicine or antidepressant. Your scans, history and a conversation with your team decide that.

Many women want to know whether these changes are permanent.

Bones

If the ovaries recover, bone density may partly return, though often not completely. If menopause becomes permanent, bone care remains important for life.

Mood

Mood often improves as hormones recover and life settles after treatment. Some women find the end of treatment brings its own worries, so support is still worth using.

Keep checking

Ask whether a repeat bone scan is planned after treatment ends.