it isn't entirely paranoia necessarily with mental health services - there are pretty horrendous psychiatrists out there - i had one who literally said to me, 'oh well it's a good job you've lost the baby really given you have mental health problems'
then when i tried to articulate my feelings about what he had said it spiralled to, 'well you clearly have personality issues' and i felt like he was going to diagnose me with some awful personality disorder for daring to stick up for myself.
they are not all like that but some are unfortunately and i've seen and heard some horror stories.
rapid cycling stuff is very hard to get managed and some psychs don't seem nearly well informed enough about it or think the patient is exaggerating. nhs pyschiatrists can also be very stuck in their ways (nice guidelines and cheapest approach doesn't help) over medication forcing patients to keep on a medication regime that doesn't work for them, sticking to a first we try this for an eon, then we only move onto next treatment option when that is exhausted etc.
if you are not an intelligent person with a lot of inbuilt rationality outside of the illness and ability to research and take control of your own treatment and options and assert your wishes in a convincing way it must be really tough. even having all of those attributes i found the mental health services a degrading and paternalistic experience and don't engage with them anymore.
the other thing is that some are fixed in their 'can't give bipolar antidepressants ever' state when in fact some people who have a lot of lows that don't respond at all to mood stabilisers (which solo just sink them into horrible depression) need ads AND something like an antipsychotic together which both deals with the mania side of things and has a catalyst effect on the ad which finally nails the depression.
sorry long waffle. do you know what meds she is on?
i was diagnosed as bipolar type 2 with rapid cycling and did indeed have a bloody awful through the mill couple of years (whereas prior to that i'd just had periodic awful depressions that eventually cleared). thankfully i've been fine for ages despite not taking mood stabilisers - i only take antidepressants and occasionally something prn for anxiety or sleep issues. it actually gives me cause to wonder if i ever was/am bipolar. for me there were a lot of huge hormonal events around that period of my life and it was only with my GP that we managed to untangle the interplay of my menstrual cycle with my mental health. is there anything else going on with your friend? could she be peri menopausal for example?
i'm not a good example really as i believe it's quite rare for it to just virtually go away. it's worth bearing in mind that for some it gets rapidly worse and i'm told can frequently at middle age hit much harder and spiral into psychotic type illness.