Feline Pregnancy and Queening

[rubyabeq]

My persian cat gave birth to still born kittens. A few days later, there was some blood laced discharge mildly foul smelling which is still occuring (its the 3rd day) I believe its a uterine infection. I live in an area that has no vets in a 100 km radius but I can give her injections (i'm a doctor) but I'm not sure what her dose should be. I can easily adminster an intramuscular broad spectrum antibiotic. Would really appreciate someone telling me the exact dose and time period (number of days). She is one year old and meduim sized cat.