Ostospray is a medicine used for the treatment of osteoporosis in postmenopausal women. It makes the bones stronger and lowers the risk of fractures. It may also be used for bone pain associated with Paget's disease. Ostospray should be used as you have been advised by your doctor. Normally you should blow your nose gently before using it, keep one nostril closed while applying the medicine into the other, and then sniff hard to make sure it reaches deep into the nose. Then repeat for the other nostril. You should take adequate supplements of calcium and vitamin D while on the treatment of this medicine to make it more effective. The most common side effects of this medicine include runny nose, nose bleed, back pain, joint pain, headache, and other nose symptoms such as itching, irritation, and discomfort. These are usually mild but if they bother you or do not go away, your doctor may be able to suggest ways of preventing or reducing them. To make sure the medicine is safe for you, before taking this medicine, let your doctor know if you have any problems with your heart, kidneys, or liver. Pregnant and breastfeeding mothers should consult with their doctors before taking the medicine.