The culture is different, Thais do not question what doctors prescribe. I am not inclined to interfere in that process, it would only confuse my GF.
OTOH, I check every medication I am prescribed here. If I think it is unnecessary, I don't take it.
For example, I have check cystoscopies here and in Australia. The urologist here routinely prescribes a post-op antibiotic, the urologist in Australia has never done so. Permit me to doubt their sterility protocols are that different.