If it's useful for anyone, here's some of the info I've put together on Tylan & used in treating my birds:
Med may treat some (but not necessarily all) strains of these health problems: Infectious Coryza, Mycoplasma, Necrotic Enteritis, Ornithobacterium Rhinotracheale
--For soluble: Mix fresh water at least every 3 days. Don't mix with vinegar.
--Soluble form less effective on adults than young birds.
--Can give with thin needle into different spots in breast muscle or subcutaneously for 5-7 days.
*Tylan 50: Up to 1.6 cc. (This is a lot of fluid--May wish to split up-- some orally, &/or inject some intramusc. &/or subcutan.
*Tylan 200: 1/2 cc. (Tylan 200 is easier for chickens. Smaller dose required.)
--Can possibly give Tylan injectible orally instead or in addition to injection, tho there has been speculation that this might cause throat damage?? You can try putting needle-less 1-cc size syringe well down throat almost to crop to try to minimize risk.
-Active for 8 hours. Can split dose into 2-3 times/day.--May cause pain at injection site & gastro-intestinal disturbance. Birds may be reluctant to eat or move very much.
* Injectible can cause minor damage to breast muscle. May be best to split dose up & inject into more than one site. Not recommended for meat birds.
Caution: Combining multiple Macrolides reduces effectiveness.
I have gathered info on a lot of different meds & compiled it in a Chicken Medicine Chart on the website linked in my sig, if you are ever looking for a reference that covers a large number of meds.