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That's weird that they sell it under antibiotics. /sigh
And yes - it's not a medication. It might possibly have some antibacterial action, but if it does it's not enough at all to call it a medicine.
As the others mentioned, it is wonderful for helping to clear the air passages of birds and facilitate breathing. I like to think of it as "oxygen therapy" as most bacteria HATE air. By keeping the air going into their sinuses, you help to reduce the chances of pockets of anaerobic bacteria thriving and causing worse sinusitis.
Incidentally, I believe all formulas of vetRx are still the same. I do know that if your feedstore only has rabbit VetRx, it's suitable for poultry. Then just look online for the usage.
Personally, I dilute a little VetRx (literally several drops only) with several drops of warm water in a dixie cup or something similar. Use a fresh q-tip every time and swab the nares (nostrils) of the effected bird. Swab the cleft opening in the roof of their beak with the same mixture. You can swab near their eyes, and I like to put it where ever they may put their head (under their wings, etc). It's labeled for water usage so that when they drink, the oil based VetRx coats their beaks and nares on its own. But I rarely do that with ill birds. I like their water clean.
It's a good complimentary supportive product for the antibacterial action of Tylan.
Incidentally, because you're using an antibiotic (and a good one), be sure to give probiotics daily and then every other day for two weeks after treatment to replace the living bacteria in the guts of your birds. The bacteria are literally the workers that nourish and feed and protect your bird. So replace those unfortunately killed by the antibiotic as it was killing the bad bacteria.
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