Alternatives to mirtazapine

I have a history of anxiety and depression and it usually impacts me at night - sweats, insomnia, nightmares.

I recently lost a close family member after being their long-term carer and the end was very traumatic so I’ve been to see the doctor.

I’ve been prescribed mirtazapine so I can get some sleep. It wasn’t until after the appointment that I realised that I’ve been prescribed this before and it made me hungry all the time and put on weight so quickly I couldn’t believe it.

I have a review in 2 weeks and was wondering if somebody could recommend a similar medication that doesn’t have that side effect? I’d just like to red up on some alternatives and go to the review appointment with some options in mind.

I feel like sometimes they won’t offer them immediately if they cost more.

Thank you.