SIBO/IMO breath test results

Hi guys - I received the results of my SIBO/IMO breath test (Genova) this morning. Negative for H2 (SIBO) but strongly positive for CH4 (IMO). I'd love to hear from others who have tested positive for IMO and also those who have taken the standard Rifaximin with Neomycin protocol. It sounds pretty brutal! My baseline breath test sample (pre-Lactulose) was already 71ppm, and all the samples for the three hours after Lactulose say >81ppm but nothing more specific, like whether there was an increase over that three hour period. I'm guessing that since anything over 10ppm is considered positive for IMO, 81ppm represents a severe overgrowth issue.