Where you list Gentamicin above, Netilmicin has much less ototoxicity potential and covers a broader range of bugs. Are you aware of an easy doxycycline ordering source?
To be bookmarked.
Not without a prescription or a doctor's license, unfortunately.
My advice: Most docs have samples of Cipro on their shelves, and they are not going to give it away at this point. It is the drug of choice as prophylaxis, they know that, and they will keep it for themselves and family and friends.
If you are concerned and want a prescription for Doxycycline, just ask your doctor for one. If they resist...play on their guilt:
"Oh c'mon, doc, I know you have cipro samples for yourself. The least you can do is write me an Rx to put my mind at ease. You know that Doxycycline is harmless, cheap, and a good prophylaxis for anthrax and plague. How about writing an Rx for me. I'll probably never take it, but it will at least let me sleep at night."
Any kind of doc can write for this, i.e., MD's, dentists (they prescribe it for gum disease all the time, they should have no problem Rx'ing this), podiatrists. Ask for a two month supply per person. That's equal to 120 Doxycycline 100 mg tablets per person. Don't take it unless you have good reason to believe there has been a release. But get the prescription filled so you have it on the shelf.
I know I have a bad attitude, but things like this remind me of the cold war adage:
"In the event of nuclear attack, put your head between your knees, cover your ears, and kiss your $$$ goodbye."