I was unable, or quite distracted (Quadricep tendon tear), to call in a refill for my Mirtazapine, and will be off of them for 24-48 hours... how long does it take for withdrawal to kick in? I've taken them for over 2 years. I already am unable to sleep (staying up far past my sleep schedule.

I rather not get anxious, nauseated or have an emetic episode... (which would cause me to OD on Ondansetron(zofran)).