there is a published paper detailing his approach and findings
https://pubmed.ncbi.nlm.nih.gov/35884166/note -
1, there are significant risk of serious adverse side effects with this protocol
2, dapsone is contra indicated in persons with G6PD deficiency
3, Horowitz only tries this on people who have failed multiple other combination antibiotic protocols over several years
4, he also only tries this after people have failed the double dose dapsone protocol first
5, as i understand it he runs safety labs including daily oxygen saturation, weekly LFT, CBC maybe others
i am pretty competent, reasonably knowledgeable and have pretty high risk tolerance when it comes to self treating - but due to the risk involved i would be very wary of trying this on a self medication basis