Table 2.

Selected studies currently active involving botulinum toxin.

Brief Study Synopsis	Year Posted	Current Status	Trial Identifier
PraB-A for treatment of chronic migraine	2021	Recruiting	NCT04845178
OnaB-A for the treatment of post-stroke and vascular headache	2020	Not yet recruiting	NCT04580238
155 units vs. 100 units of OnaB-A for treatment of chronic migraine	2020	Recruiting	NCT04349176
OnaB-A blockade of the SPG for refractory chronic migraine	2019	Recruiting	NCT04069897

PraB-A—prabotulinumtoxinA, OnaB-A—onabotulinumtoxinA, SPG—sphenopalatine ganglia.