Lois,
I was told that if I got diaorrhea, it would NOT be a side-effect, but could be a sign of infection--yet at the same time, the 'Treatment Booklet' which I have where side-effects are monitored DOES list it, in varying degrees!
THE carboplatin and the Dexamethosone after it has, each time, made me constipated for 2 days, I've eaten as much fruit and drunk as much fluids as possible and it generally 'goes the other way' a bit! by day 3 or 4 after treatment.
Brenda