Someone mentioned earlier that the previous taking of CIPRO would reduce further effectiveness of the drug. Isnt CIPRO a doxycycline? Quite a few of us take that an awful lot as a sub-saharan anti malarial. Does this mean that on an individual basis the antibiotic will constantly reduce in effectiveness? Aaaaargh! Malaria, Anthrax or nasty side effects, you too can get 'em all.