The reason doctor's are giving a 7 lower dosage is to reduce the side effects. Talk to you doctor, but I believe both are equally effective.

From personal experience again. I receive Cisplatin every 3 weeks, however, not concurrent with radiation. I have faired well with this schedule. My experience is that the 1st week is mostly fatigue, lost of appetite, change of taste, and mouth starts to change. 2nd week is when most of the side effect increase. (For me, personally, my pain and discomfort is a 4 on a scale of 1-10) 3rd week, for me, is recovery, everything returns to normal. I really enjoy the reprieve the 3rd week gives me. I just want you to know that not everyone has a terrible experience with chemo. Everyone is different.

Remember also that the chemo continues to weeks after infusion.

One negative aspect is how long you need to spend in the doctor's office to get an infusion. With Chisplatin, you need at least 2 100 mL normal saline which takes 2 hours, an hour for the Cisplatin plus other medications to help with side effects. This is just one aspect of your schedule you may want to discuss.

Another question to ask is how does the weekly Cisplatin affect white blood cells. Possibly a lot less so than the 3 cycles. For me, the Nulasta shot I received after treatment has negative side effects also.

I guess the big question I would ask the doctor is this. Both Cisplatin and radiation have fatigue and especially mouth sores as side effects. What is the combined effect doing Cisplatin weekly. Does it compound the mouth sores and fatigue. My experience with Cisplatin only is that my mouth exploded the first week but recovered by the 3rd. I must perfer I rather take one shot, and not have to suffer every week from the drug.
But as everyone will say many, many times, each person's experience is different.

Sandy