"i have been using mirtazapine for over 10 years, i started with a does of 15mg which worked wonderful with insomnia, however during the time of first using it i was suffering from anxiety, and my doctor up the dose to 30mg which i was on for a few years, until anxiety became worse, which he up the dose to 45mg which i found was to strong as i noticed that dizziness started to happen, so i halfed the dose of 45mg and it all settled down. the dose was a little low, so i went back to 30mg and have been on this dose for the last 6 years. i do not get side effects from this medication of weight gain, or dizziness and even photo sensitive, i have been on it for quite some time and do not plan on getting off it as it works wonderful."