Okay, this is my experience. I suffered with "C" mostly because of the meds to prevent nausea they gave IV during chemo, not the Cisplatin, although I've read Cisplatin can do some things to gut nerves. In fact, a couple of the nurses told me that those meds were as powerful as pain meds for causing constipation. But if you are getting both, who knows what's causing it for you, it's just happening.

I got so I took my senokot-s (the max number) BEFORE chemo. That way I got through the next two days. I took senakot, two a day, every other day, after the first three weeks of treatment. But, you are correct Morgan when you say you have to be "cleaned out" for something like senokot to work. I figured that one out too with the advice of another nurse. I too never suffered from constipation to any degree before this. Another humbling experience, which does indeed give us the ability to sympathize with others . . . Also constipating was the iron I had to take because all my life I have been either slightly anemic or just over the minimum. And I found out that too much fiber will cause constipation, to my surprise.

Yeah, I think everyone has it to some extent during treatment, although I never took a survey in the waiting room!
Anne