migraine
"I was nervous about the pain, and even though it's needle-free, I have a bit of a needle phobia and the idea of any injection (even without a needle) was pretty rough for me to get over.  After talking myself up for about 30 minutes, I was finally able to give myself the dose.  It hurt a lot more than I was expecting, and bled more than my neurologist and pharmacist said it would, so immediately after administering it, I was pretty apprehensive.  I felt the side effects most people have reported (weakness, dizziness, heaviness, etc.), but I also had some nausea and I was really tired.  I felt near-immediate relief of about 50% of my migraine, and then took a power nap for about 45 minutes. When I woke up, I felt like a completely new person."