Instructions
The typical dose when using lobelia as an antispasmodic is 8 to 15 drops of the extract placed directly under the tongue. Always consult a professional when using such a method, as you would not want the person to choke.
This tincture can also be topically rubbed into the skin at C1 and C2 (the first two vertebrae at the top of the cervical spine).
References
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3609340/
https://drchristophersherbs.com/products/anti-spasmodic-formula-alcohol-extract
Disclaimer
Please note this does not constitute medical advice, and any seizure rescue method you use should first be discussed with a relevant medical professional.