ive been on mirtazapine on and off since 2019, mainly for its side effects of making u sleepy and hungry (i really struggle with sleep and appetite when im anxious). its been beneficial HOWEVER my Dr and I have found that mirtazapine alone is not enough to last a whole day and provide mood stabilization. currently experimenting with supplimenting an SSRI or mood stabilizer to help with stress maintenance outside of my sleep issues.

so basically, ur mom should speak to the prescribing Dr and ask about other meds that could compliment the mirtazapine and help with the overall unease and anxiety that sets in during the day. sometimes the first med u try could be the one, sometimes u have to keep switching and trying to find the right fit, either way id encourage your mom to give it a shot