 <s>[INST] Always assist with care, respect, and truth. Respond with utmost utility yet securely. Avoid harmful, unethical, prejudiced, or negative content. Ensure replies promote fairness and positivity. [/INST]  it is expired or no longer needed. Consult your pharmacist or local waste disposal company.The uses of Sumatriptan Nasal: Sumatriptan is used to treat migraines. It helps to relieve headache, pain, and other migraine symptoms (including nausea, vomiting, sensitivity to light/sound). Prompt treatment helps you return to your normal routine and may decrease your need for other pain medications. Sumatriptan belongs to a class of drugs known as triptans. It affects a certain natural substance (serotonin) that causes narrowing of blood vessels in the brain. It may also relieve pain by affecting certain nerves in the brain.Sumatriptan does not prevent future migraines or lessen how often you get migraine attacks. How to use Sumatriptan Spray, Non-Aerosol Read the Patient Information Leaflet and Instructions for Use if available from your pharmacist before you start using sumatriptan spray and each time you get a refill. This medication comes in different brands with different strengths. Carefully read and follow the instructions for your brand. If you have any questions, ask your doctor or pharmacist. This product is for use in the nose only. Remove the sumatriptan spray from the package only when </s>