The only bad bit is if they think you're hours or days away from killing yourself they'll put you in hospital. I've been in 1 good, one kinda bad, one terrible. Loud noise, awful staff, bad food, terrible communication about what they're doing with you, terrible facilities, no access to much of anything. It was as close to a prison as you can get except I wasn't locked in my room at all. Not doing that again, I'll lie like I've never lied before if I see it coming. The plus side is it's easy to avoid, they have so few spaces that you can even say you feel suicidal and not be admitted. They will only admit you if they seem sure you're actively planning your suicide in the very short term.
As for meds, therapy etc, give it a go. You might have some side effects, you might not, often not, until you've tried a few. Eg headache, worsening condition, no sex drive, dry mouth, restlessness, nightmares and night sweats. If you're unlucky it could be bad but it's fairly rare. But they won't tell you, so just be ready. I was one of the unlucky ones and some symptoms lasted 20 years, others were excruciating. Either I was unlucky or it's more common than I think. Oh and you might get side effects coming off, rather than going on.
Please excuse me: F you, NHS, and f Tory scum.