NAB - just one more thing and I'll butt out. My friend has seen several GPs in the last few years due to moving.
She says that apart from the one she has now, they all, on finding out how long she'd been on ads, said well we'll have to see about weaning you off the ads. She's the expert of her illness having suffered from clinical depression since her teens and now knows to knock that idea on the head as soon as it arrives.
GPs are by definition generalists. If you have one with a special interest in mental health then you are lucky, if not he/she may not be the best person to get advice from. My friend gets good help from her CPN as well as her present GP.