i found this info below:
http://www.marvistavet.com/index.html
go into the pharmacy...
BRAND NAME: BAYTRIL
AVAILABLE IN
5.7 mg, 22.7 mg, 68 mg & 136 mg
TABLETS
BACKGROUND
Until penicillin came on the scene in the 1940's, our efforts to combat bacterial infection were largely ineffective. As different antibiotics were developed, different types of bacteria were conquered, yet one bacterial species remained seemingly invincible: Pseudomonas aurugenosa. Eventually antibiotics (the aminoglycoside class) were developed that could kill Pseudomonas but they were available only as injectable products and had potential to cause significant kidney damage if used too long. With these kind of side effects and the ability to treat Pseudomonas limited to hospitalized patients (where injections could be given regularly), the battle with Pseudomonas was far from won.
A major breakthrough was the development of the fluoroquinolone class of antibiotics (including enrofloxacin, its counterpart for human use ciprofloxacin, and several others). These medications are active against many bacterial types including Pseudomonas. They are available as tablets and are not associated with the serious side effects that plagued the aminoglycoside group.
Fluoroquinolones act by deactivating bacterial enzymes necessary for the transcription of DNA. DNA is very tightly coiled in order to fit inside a cell. Segments to be used must be uncoiled by an enzyme called DNA gyrase. The fluoroquinolone antibiotic deactivates DNA gyrase making the reading of DNA impossible. The bacterial cell dies. Mammalian DNA gyrase is of a completely different shape and remains unharmed.
USES OF THIS MEDICATION
This medication may be used in either dogs or cats to combat different types of infections, especially those involving Pseudomonas. Enrofloxacin is also active against Staphylococci, and thus is commonly used for infections of the skin.
SIDE EFFECTS
At approximately ten times the recommended dose vomiting and diarrhea may be seen with this medication. At normal doses, this should not be seen. Dogs with Pseudomonas ear infections require very high doses of enrofloxacin and nausea may indeed become a problem.
In immature dogs (less than 8 months of age) damage to joint cartilage can occur. This phenomenon is only seen in growing dogs and does not seem to be a problem in cats. It is preferable not to use this medication in puppies unless the severity of the infection present warrants it.
The use of enrofloxacin can produce crystals in urine. These crystals may show up on a laboratory test thus it is important to be aware of this side effect.
See below regarding the recently described feline retinal problem associated with enrofloxacin at higher doses.
BRAND NAME: TYLAN
AVAILABLE IN
ORAL POWDER or
INJECTABLE
BACKGROUND
Tylosin is an antibiotic of the “macrolide” class (same class as erythromycin). It is made naturally by the bacterium “Streptomyces fradiae” and acts to inhibit bacterial protein synthesis by inhibiting the 50S ribosome, a cellular structure only certain bacteria have and use to make internal proteins.
HOW THIS MEDICATION IS USED
Tylosin is licensed for use as a broad spectrum antibiotic for injectable or oral use in treatment of infection in livestock. In small animals, tylosin is used for its anti-inflammatory properties in the large intestine rather than for its ability to fight infection. While few formal studies have been performed to examine this non-antibacterial property of tylosin, this has not stopped tylosin from being widely used in the treatment of colitis in pets.
Tylosin can also be used in ferrets, rabbits and pocket pets.
SIDE EFFECTS
While there is definite side effects potential in large animal species, dogs can tolerate very high doses of tylosin with no adverse effects. The biggest problem with small animal use seems to be the especially foul taste of tylosin which necessitates formulation into capsules usually by a
reptiles are basically the same as mammals in morphological terms, with only slight metabolic and structural differences.