If youve been injected in a dream, then it shows some opinions that were introduced to you. Perhaps you do not understand this yet, but you do not have your own opinion about something, because the one you have was influenced to you by others. You feel that you are controlled by others. The injection could also symbolize the new activities you are ready to take. Perhaps there is something major happening in your waking life, something you never tried before. If you wish to get more detailed interpretation about your dream, please see the meaning of Syringe.