Introduction: Migraine is a complex neurological disorder that can significantly impacts patient’s daily functioning, limits their ability to perform routine activities and adversely affects their overall physical and mental well-being. Biological therapies represent a modern treatment option, as they can reduce the frequency of migraine attacks, pain intensity, and the functional limitations associated with migraine. In Slovenia, there is limited real-world data on their effectiveness in routine clinical practice. Aim: Objective: The aim of this study was to evaluate the impact of biological therapies on the functional status of migraine patients, as well as their effect on the number of migraine days, pain intensity, and analgesic use. The study addressed three hypotheses: 1. The introduction of biological therapies significantly reduces migraine-related disability, as measured by the MIDAS questionnaire. 2. Biological therapies reduce headache intensity, as assessed using the Visual Analog Scale (VAS). 3. Biological therapies decrease the number of monthly migraine days and the use of analgesics. Methods: A retrospective quantitative analysis was conducted on a sample of 92 patients aged 18 to 65 years with a diagnosis of migraine who received biological therapy at the Neurology Clinic in Ljubljana. Data were collected at three time points: prior to therapy initiation, and after 3 and 12 months of treatment. The MIDAS and VAS questionnaires were used, along with information on migraine days and analgesic use. Statistical analysis was carried out using descriptive statistics, the Wilcoxon signed-rank test, and the Friedman test in SPSS. Results: The study included 92 patients (87% female), with a mean age of 44.5 years. The median number of migraine days per month decreased from 10 [IQR: 7–12.5] before treatment to 3 [IQR: 2–5] after three months, and to 2 [IQR: 1.5–3] after one year. Analgesic use declined from a median of 12.5 [IQR: 9–19.5] tablets per month before treatment to 4 [IQR: 1–6] after three months and to 2 [IQR: 2–4] after one year. Median pain intensity decreased from 8 [IQR: 8–9] to 4 [IQR: 3–6] after three months and remained at 4 [IQR: 3–5] after one year. The median MIDAS score decreased from 19 [IQR: 12–30] before treatment to 4 [IQR: 0–7] after three months, and to 2 [IQR: 0–6] after one year. All changes were statistically significant (p < 0.005). Discussion and Conclusion: These findings support existing literature, demonstrating that biological therapies effectively reduce the frequency and intensity of migraine attacks and improve patients’ functional status. Notably, the benefits were observed as early as 3 months after therapy initiation and were maintained at 12 months.
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