I've always thought an employer should only be able to test for non prescribed drugs/medicine. The test should go to our doctor first and then the doctor will verify what may be there that isn't prescribed.
I am sorry your probation got extended because of one sick day. That seems ridiculous. Keep notes so if they try to fire you, you can fight it. Try to remember the date that they told you they were happy with your work for example.
Do you work in a high risk industry? In Canada they can only do testing like that if you are someone like a pilot or working with super bugs at a lab or in the military. They can't just do it routinely. It must present a clear and present danger to society. Seems a lot like Big Brother to me. Ridiculous.
HI, my goodness it stinks doesn't it? I am not sure about your rights and I know exactly what you mean about mentioning the word Bipolar..maybe coming clean would be the easiest option though especially with the drug testing! When I am trying to be honest without saying the word Bipolar, I say I have a mood disorder, it kind of softens the blow.
They can't ignore the evidence, you had 1 sick day in 3 months, that is great! You have your illness under control, I don't see their problem! They should be more worried about the people with a poor performance, lots of sick days, than someone who is diagnosed, receiving treatment and is open and honest!
Grrrr!
Sorry I can't be of much help!