Khandat suggests an interaction between mirtazapine and lisinopril in an elderly 74-year-old male who presented with delirium and a CK of 43,000 IU/L, 26 but was treated for a urinary tract infection. In all these cases there are other more likely causes for a reduced level of consciousness or CK elevation than mirtazapine toxicity. No patients in our series had an elevated CK, although this. Elderly. The recommended dose is the same as that for adults. In elderly patients an increase in dosing should be done under close supervision to elicit a satisfactory and safe response. Renal impairment. The clearance of mirtazapine may be decreased in patients with moderate to severe renal impairment (creatinine clearance 40 ml/min). This should be taken into account when prescribing. Elderly patients: As in adults. Changes, especially increments of dosage must be made cautiously and under close supervision. Children and adolescents under 18 years of age: Mirtazapine should not be used in children and adolescents under the age of 18 years as efficacy was not demonstrated in two short-term clinical trials (see section 5.1) and because of safety concerns (see sections 4.4, 4. Mirtazapine is a newer antidepressant that exhibits both noradrenergic and serotonergic activity. It is at least as effective as the older antidepressants for treating mild to severe depression. Clinical Points. Mirtazapine leads to rapid and sustained improvement in depressive symptoms and is effective in subgroups of depressed patients, particularly anxious patients and those with melancholic depression, treatment-resistant depression, geriatric depression, depression and anxiety associated with alcohol dependence, and agitated elderly patients. IN elderly people mirtazapine in low dosage is a good medicine for sleep and I generally prescribe it in the dosage of 7.5mg. Its an effective drug in this dosage and I have never notied such a problem. There could be three possibilities: 1) Mirtazapine could have been prescribed in a higher dosage leading to complications. 2) Some other drug was prescribed instead. 3) She had an reaction to. Remeron (mirtazapine) is a tetracyclic antidepressant used to treat major depression and posttraumatic stress disorder (PTSD). Common side effects of Remeron include dry mouth, weight gain, increased appetite, increased cholesterol and triglycerides, dizziness, constipation, confusion, and abnormal dreams. Consult your doctor before taking Remeron if pregnant or breastfeeding. Approximately 190 elderly individuals (≥65 years of age) participated in clinical studies with Mirtazapine Tablets. This drug is known to be substantially excreted by the kidney (75%), and the risk of decreased clearance of this drug is greater in patients with impaired renal function. Because elderly patients are more likely to have decreased renal function, care should be taken in dose. However, elderly patients are more likely to have confusion or unusual drowsiness and age-related kidney problems, which may require caution and an adjustment in the dose for patients receiving mirtazapine. Breastfeeding. There are no adequate studies in women for determining infant risk when using this medication during breastfeeding. Weigh. Mirtazapine clearance is slower in the elderly than in younger subjects. Exercise caution when this drug is given to elderly patients. In a clinical trial, elderly males showed a marked decrease in mirtazapine clearance when compared to young males taking the same dose. This difference was less significant when clearance was compared between elderly females and younger females taking.