EllanVannin
I had two jabs against Asian 'flu in 1957 but I still got it with working on an infected ward and was hospitalised with pyelitis which left me with an iffy kidney and I've been taking medication for kidney failure for 13 years.
Although I'll get the vaccination eventually, I'm in no hurry because nobody seems sure about possible adverse effects concerning warfarin and spironolactone.
Regarding warfarin, on the contrary, lots of people are sure. From the British Heart Foundation website:
Is the vaccine safe for people taking blood thinners like warfarin or other anticoagulants?
Like most vaccines, the coronavirus vaccine is injected into the muscle of your upper arm. As with any injection, there is some risk of bleeding. Injections into your muscle may bleed a little more than injections that are given under the skin, but less than those that are given into a vein. If you are taking a blood thinner such as warfarin, or a new anticoagulant, the bleeding may take a little longer to stop and you may get more bruising on your upper arm.
Public Health England and the Department of Health have said that you can have the vaccine if your anticoagulant treatment is stable. That generally means that you will have been taking the same dose for a while and that if you are on warfarin, that your INR checks are up to date and that your latest INR level was in the right range.
I can't help with spironolactone but I'm sure your GP or other medical person could provide the necessary information