Key clinical point: Prior treatment with onabotulinumtoxin-A may improve subsequent clinical response to preventive treatment with anti-calcitonin gene-related peptide (anti-CGRP) monoclonal antibodies (mAb) in patients with chronic migraine.
Major finding: At 3 months of treatment with anti-CGRP mAb, patients who received vs did not receive prior onabotulinumtoxin-A had fewer mean monthly migraine days (3.3 days vs 5.2 days; P = .017), lower pain intensity (Numerical Rating Scale scores: 5.9 vs 6.6; P = .013), and a lower mean Migraine Disability Assessment score (23.2 vs 37.4; P = .013).
Study details: The data come from a retrospective observational study including 128 patients with chronic migraine who received treatment with anti-CGRP mAb, of whom 39.9% received prior treatment with onabotulinumtoxin-A.
Disclosures: This study did not receive any external funding. Three authors declared receiving speaker honoraria from or serving as consultants or scientific advisory board members for various sources.
Source: Ceccardi G et al. Onabotulinumtoxin-A: Previous prophylactic treatment might improve subsequent anti-CGRP monoclonal antibodies response in patients with chronic migraine. Toxins. 2023;15(12):677 (Nov 30). doi: 10.3390/toxins15120677