Just thought of something else. Rats can and will breed through cage wire. Pretty much anything that they'll be able to see each other through, they'll be able to breed through. if they can't breed through it, they'll chew through it to breed. If you have them housed together currently, your female with probably end up pregnant. They can reproduce at 5-6 weeks old and can be impregnated again just hours after giving birth to a litter. Keeping them in the same cage is a recipe for disaster, and hundreds of baby rats.
If she is to be put on antibiotics (which she absolutely should be ASAP as rats can go from sneezing to pneumonia to death in just a matter of days) you do NOT want her pregnant. She should not be pregnant or nursing while on antibiotics.
Goosemoose.com has an amazing rat forum called RatsRule. Every rat owner should check it out, it's got every bit of info you could ever want to know.