Comparison Between Mirtazapine and Megestrol for the Control of Anorexia-cachexia in Cancer Patients in Palliative Care.

Cancer-associated anorexia-cachexia is an insidious syndrome that has a major impact on the patient's quality of life, but is also associated with a significant reduction in survival. Despite its clinical importance, it remains a widely underestimated and untreated condition. Considering the scarcity of pharmacological measures, it is necessary to invest in studies that may contribute to the rational and effective treatment of this clinical condition. Mirtazapine has a special therapeutic potential because it is a well-tolerated drug with few adverse effects and with well-known orexigenic action in clinical practice.The objective of this study is to evaluate the effect of mirtazapine as a pharmacological measure in the management of cancer-related anorexia-cachexia in patients in palliative care. A randomized, double-blind clinical trial involving 52 cancer patients with anorexia-cachexia in palliative care will be conducted. Patients will be randomized to receive mirtazapine or megestrol and will be evaluated longitudinally for a period of 8 weeks. The primary endpoint will be to assess the effect of mirtazapine on anorexia and weight gain and secondary outcomes will be to assess the tolerability and safety of mirtazapine and the effect of mirtazapine on body composition, quality of life, and functional capacity of patients.

Sex

All

Minimum age

50 Years

Inclusion Criteria:

* Patients aged ≥ 50 years.
* Patients with confirmed diagnosis of cancer by histopathological examination, including those not yet submitted to any therapy because they are in the therapeutic definition phase and those whose therapies have already been suspended because they are ineffective.
* Patients with cancer progression, with either local or distant metastases, documented by radiological or histopathological methods.
* Patients complaining of anorexia graded by the patient as ≥ 5 by the Edmonton Sympton Assessement Scale.
* Patients with weight loss ≥ 2% in the last 2 months or weight loss ≥ 5% in the last 6 months, referred by the patient or documented in electronic medical records, compared to the stable weight before diagnosis.
* Patients with a life expectancy of ≥ 2 months by the Palliative Prognostic Score.
* Patients with performance status greater than or equal to 60% using the Karnofsky Performance Status scale.

Exclusion Criteria:

* Patients diagnosed with depression or using antidepressant therapy with a score ≥ 12 in the depression items of the Hospital Anxiety and Depression Scale.
* Patients with unstable doses of corticosteroids.
* Patients with moderate renal and/or hepatic dysfunction (total bilirubin ≥ 1.5x the upper limit of normal, AST and ALT ≥ 5x upper limit of normal or creatinine ≥1.5x upper limit of normal).
* Patients with Central Nervous System metastases.
* Patients with inability to take oral medications.
* Patients with mechanical obstruction of the gastrointestinal tract.
* Patients with clinically bulky ascites and generalized edema.
* Patients with reports of allergy to the medications studied.
* Patients with hypothyroidism with TSH levels greater than or equal to 5 μU/mL and free T4 less than 0.7 ng/dL.
* Patients with uncorrected hydroelectrolytic disturbances, with altered serum sodium, potassium and/ or ionic calcium.
* Patients with persistent and uncontrolled nausea and/or vomiting associated with gastrointestinal tract neoplasia and/or chemotherapeutic or radiotherapeutic treatment.
* Patients with pacemakers.

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