Eating mirtazapine dizziness usually need 24-72 hours to make dizziness completely better, usually according to the patient’s physical different, take the drug concentration, time and specific analysis, mirtazapine after taking in the body lasts 2 hours can reach the peak of the effect, in 24-72 hours after the metabolism will be completed, for young people to speak 24 hours after the dizziness can be completely improved symptoms. In middle-aged people, the half-life of the drug is usually longer, that is, it lasts in the body for 24-48 hours, and the dizziness will be completely resolved 48 hours after taking Mirtazapine. In the elderly, the half-life of the drug is relatively long, and dizziness will not fully resolve until 72 hours after taking Mirtazapine for a long period of time or in large quantities.