Pamidronate belongs to a group of drugs called bisphosphonates. Bisphosphonates are commonly used to treat bone thinning (osteoporosis). In certain situations, they can help protect your bones against some of the effects of secondary bone cancer, such as pain and weakness. Secondary bone cancer occurs when cells from the original (primary) cancer spreads to form a new tumour (secondary cancer or metastasis) in the bone.
Pamidronate is often given alongside other cancer treatments. As well as being used in some types of secondary bone cancer, it has been shown to be effective in people with myeloma, a cancer of the plasma cells in the blood. It is also used to lower a raised calcium level in the blood.