Satsuma Pharmaceuticals (NSDQ:STSA) has announced that it has enrolled the first patient in its SUMMIT Phase 3 efficacy trial of STS101, a drug-device product that is a potential acute treatment of migraine. STS101 is a nasal powder containing dihydroergotamine (DHE), an analgesic already available to treat migraines and cluster headaches. In fact, migraine patients have…