You can get cold turkey off of Spironolactone, but it may cause you blood pressure to rise quite a bit. I really depends on the reason it was prescribed for. In my case I use it as a diuretic (it's nick name is water pill), and I would need another diuretic when I stop it.
You could check with your pharmacist, bcause they know what it was prescribed for and ho you can stop it best. The pharmacist is definitely a better source for medication information than a surgeon is (and in many cases they know more about the stuff than the prescribing doctor who looked into his Merck Register to find the medication).