I had 30 treatments over a 6 week period. Chemo was weekly which was added to enhance the radiation. Major side effects for me were a bad sunburn effect on my neck where the beam was targeted. Nauseous feeling which killed the appetite, weight loss, dry mouth and mouth sores. Lingering effects continue after treatment. Topical treatments on the neck are key and forcing your self to eat for fuel and function is essential and dry mouth meds are helpful. Hope this helps! Take care!