Patient received 2 IM vaccines in left deltoid at 0805. Patient stood up without issue and went and sat in another chair. Do dizziness with standing. 3 minutes later patient states he felt dizzy. Eyes rolled back and his head fell to the side. Patient was pale and sweaty. His mother was standing next to him and supported his head. Patient regained consciousness within 30 seconds. No nausea or vomiting. Elevated patient’s feet and had him sit for 15 minutes. He then was able to stand without issue afterwards and reported no dizziness or nausea. was able to ambulate out of clinic without issue