M Spray is a medicine used to prevent and treat allergic symptoms like sneezing and runny nose due to allergies. It works by reducing swelling and irritation in your nose and belongs to a group of medicines called corticosteroids. You should always use M Spray as advised by your doctor. To get the full benefit of the medicine you should take it regularly. 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. The most common side effects of this medicine include headache, sneezing, nosebleed, sore throat, and respiratory tract infection. If you are worried about any of the side effects, let your doctor know. Your doctor might be able to help you cope with the side effects. In general, you should try to avoid situations which make your symptoms worse (things like pollen and dust mites) and it’s best not to smoke. Before using this medicine, you should ask your doctor for advice if you are pregnant or breastfeeding. It is important to discuss the risks and benefits with your doctor. Let your doctor also know if you have any other medical conditions taking any other medicines.