This was the worst experience! I started taking Doxy to rid myse...

The skin you complain about being on fire, or stinging is also what's usually exposed to sunlight. Not using a very good sunblock while on this medication for some people can result in the exact symptoms you describe. The fact the skin symptoms persisted well beyond the time most of the drug was vacated, it does sound like sunburn. Keep in mind it won't feel like a normal sunburn, the drug increases sensitivity to the sun's rays. You can get burned inside your house or car from rays coming thru the glass.

As for the drug being strong enough for Anthrax (and Malaria) well it's been that way since the 1960's when the drug won FDA approval.

MY SON WAS ON DOXYCYCLONE FOR ALMOST TWO WEEKS FOR TREATMENT OF LYMES DISEASE WITH NO SIDE EFFECTS AT ALL. THEN WE WENT ON VACATION TO THE BEACH AND EVEN THOUGH HE HAD SUN BLOCK, HE STILL GOT BURNED MOSTLY JUST ON HIS FACE. THE NEXT TWO DAYS HIS FINGERS WERE SLIGHTLY TINGLY AND HIS HANDS FELT LIKE THEY WERE ON FIRE. I ASKED HIM WHAT WAS DIFFERENT AND HE TOLD ME SINCE WE HAD BEEN ON VACATION, HIS ALLERGIES HAD BEEN ACTING UP SO HE HAD BEEN TAKING HIS ALLEGRA. I TOLD HIM TO STOP THE ALLEGRA AND IN 24 HOURS, THE BURNING SENSATION WAS GONE. I HAVE BEEN READING THAT OTHER PEOPLE HAVE HAD THE HEAT AND BURNING SENSATION IN THEIR EXTREMETIES. HAVE ANY OF YOU ALSO BEEN ON ALLEGRA OR OTHER ANTI-HISTAMINES? COULD THIS BE A POSSIBLE DRUG INTERACTION? MY SON IS ALMOST DONE WITH HIS 4 WEEK TREATMENT FOR LYMES DISEASE AND HAS NO OTHER PROBLEMS.