What have your doctors told you about your treatment with cisplatin?
On a web site of pharmaceutical information, here is what I found about administration of this drug:
Pretreatment hydration with 1 to 2 L of fluid infused for 8 to 12 hours prior to a cisplatin dose is advised. The diluted drug is then infused over a 6 to 8 hour period. Maintain adequate hydration and urinary output over the next 24 hours.
That sounds to me like it's pretty much a daylong procedure. Is this what your doctors have told you?
Here's that page of information on Cisplatin:
Another site I found also had the information on pre- and post-hydration, but noted that the Cisplatin could be administered over a time period of an hour or two. It noted, however, a longer infusion time of 6-8 hours may decrease gastrointestinal and renal toxicities.
Here's that second reference:
Does this help?