After injected inter-muscularly into upper back, traps and neck area, I immediately felt a numb sensation on face lips inside mouth back of throat and dizziness to the point where I was certain I was going to faint. Days, into 2nd week there was still pain at injection sites, tiredness, fatigue, nausea and a constant sore throat. At end of 2nd week after injections, I woke up with a 'mysterious' hive-like rash on my back, abdomen and arms, while asleep one night, that I had never experienced before. My doctor had me take Zyrtec and and cortisone cream on the itchy rash. The day it cleared, I experienced bleeding from my ear, pounding in ear and head. Another thing never experienced before. Others have said he tolerate it well or have lesser side effects than me. I will NEVER allow that to be injected into me again.