Sorry that she is dealing with this but it's good that she finally has the SIBO diagnosis and that her GP seems to be knowledgeable.
Was she able to gain weight with the antibiotics? And if so, has she lost it again?
I sincerely hope she gets some help from her GI soon. The GI could possibly want a repeat breath test to document that she still has it but should certainly have some kind of effective plan... one would hope.
This article below, which touches on SIBO says 44% of people have symptoms again after 9 mo and sometimes rotating antibiotics are 1-2 weeks each month.
"SIBO is characterized as relapsing because after receiving the first successful dose
of antibiotics, approximately 44% of patients suffer from the same symptoms again after
nine months. Based on the severity of the symptoms and their rapidity of return, patients
usually need to follow a regimen of rotating different antibiotics. This rotation is followed
for 1 to 2 weeks each month. Once in a while, some patients need to follow a continuous
regimen of antibiotics. However, this kind of treatment has not been studied enough. In
most cases, the patients are tested for SIBO before the new antibiotic therapy [29]." from
Gastrointestinal Tract Microbiome Effect and Role in Disease Development
N Crnčević,
M Hukić, S Deumić, A Selimagić, A Dozić… - Diseases, 2022 - mdpi.com
Sending healing thoughts her way and a hug!