These last two days I've been very light headed. I'm under a lot of stress at the moment and have been taking Mirtazipine for about a month. After googling it would appear that it can cause light headedness but surely not this late on in treatment?
Have you been eating too little and/ or drinking too much alcohol recently? I'm not being rude; I've just noticed this happens to me when I do both of those things.
You might need to alter the dose. It's true what Cloverjo said, drinking or not eating enough with meditation can cause low blood sugar/ low blood pressure. I was on them for 4 years.x