Taking medication which causes frequent urination

Hi,
I just recently had open heart surgery, my doctor has me on Lasix. It's a pill that makes me urinate every 15 minutes and lasts for up to 6 to 7 hours.

Which depend product would be best suited for me to wear, so I can function normally at work without having to get up to the bathroom every 15 minutes, like a coke head?

Hopefully a diaper/underwear that allows me not use use the bathroom for up to 8 hours.

Thanks.
Hosay