I don’t know what medication you were given but I know in Canada we also give treatment for chlamydia when we treat gonorrhea.
The main reasons this is done is because currently they believe that using two medications that work different ways will improve the treatment result and possibly delay the medication becoming resistance to gonorrhea in the future. They also find it is common for chlamydia to be found with the gonorrhea as well.
There is a chance that antibiotics can cause a yeast infection, I don’t know if having the two antibiotics increases the risk when compared to just having the one antibiotic.
Please leave a comment to let us know if this answers your question or if you need more information.
For other readers, please feel free to leave a comment, or let us know if this was helpful.