 <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]  to a group of drugs called triptans. It affects a certain natural chemical (serotonin) that constricts blood vessels in the brain. It may also block other pain pathways in the brain. How to use Zembrace Symtouch Pen Injector Read the Patient Information Leaflet if available from your pharmacist before you start using sumatriptan and each time you get a refill. If you have any questions, ask your doctor or pharmacist. This medication can be injected by using a syringe/needle, an auto-injector, or a needle-free device (depending on the brand prescribed). Learn all preparation and usage instructions in the product package. If any of the information is unclear, consult your doctor or pharmacist. Make sure you understand the correct technique for injection and how to properly dispose of needles, syringes, auto-injectors, needle-free devices, and unused medication. Inject the medication just below the skin as soon as the symptoms of your migraine/headache appear. Before injecting each dose with a syringe and needle or an auto-injector, clean the injection site with rubbing alcohol. If using a needle-free device, your skin should be clean and dry before injecting. This </s>