Due to malignancy blood calcium levels may increased.
To decrease it you may drink
1. Plenty of water
2. IV fluids may flush out excessive calcium.
are effective to reduce calcium effectively.
4. Calcitonin may useful in decrease serum calcium levels.
5. Denosumab is useful for cancer related hypercalcaemia
Also check for other conditions that elevate CA -125 like endometriosis
, liver cirrhosis, normal menstruation
, pelvic inflammatory disease
, uterine fibroids etc.
There is no specific methods or medication to reduce ca 125 levels. But few dietary changes may useful to prevent to elevation of it.
Eating ginger with garlic or eating green leafy vegetables, regular exercise and yoga may help. But final cure with chemotherapy with or without radiotherapy.
Please consult your doctor he will examine and treat you accordingly.
Hope I have answered your query. Let me know if I can assist you further.