I've not tried Venlafaxine and Mirtazapine together and have no intention of doing so - the reaction to Vellafaxine was so bad, I will never take it again.
I nearly called an ambulance I was that bad on just one pill.
I woke up at 3 am in a pool of sweat, my entire body shaking. I could feel every heart beat through every blood vessel in by body. With each heart beat, if felt like a conveyor of millions of tiny insects crawling through my veins. My lips felt like they were going to burst and my toe nails felt like one more heart beat would make them explode off my toes etc.
My heat rate was at about 140-150 bpm continuously and I was gasping for air uncontrollably like I was drowning.
I laugh about it now, but my DP tells me that I couldn't speak fast enough, my brain not able to keep up with the speed my mouth was moving, trying to verbalise what I was thinking - like listening to a tape recorder on fast forward. I developed blotchy rashes all over my body and was itching everywhere like crazy.
I was shaking and panicking but my DP managed to keep me stable and just about in control until I was able to be escorted to the GP surgery who took one look at me and jumped the queue immediately to a Dr who (as informed by my DP who was with me, I can't remember anything about it) that I'd had some kind of noradrenaline allergic reaction which was rare, but not impossible and said not to take anymore Venlafaxine.
Never again, under any circumstance. Ever.
The only effect I've had from the Mirtazapine is flu like symptoms, a two week long head ache and aching joints with no positive effect whatsoever.
I'm starting to feel I'm resistant to front line treatments.