Where there are Udgeeth pranayama benefits we also need to focus on its precautions well. If you keep these points in your mind that will prevent you to get into any kind of trouble while doing this yoga. There is no such harmful effect of Omkara jap. Yet doing it improperly can cause minor problems.
Do not practice this yoga forcefully, take a breath according to your body capacity.
Try to do this yoga after 4-5 hours of taking a meal but the best time is to it in the early morning with an empty stomach. Rest for a while if you feel tired of doing it.
Sitting in the wrong posture will not benefit instead cause problems.