Hi Jerry,
I went back to the vet, and she said my dog has some sort of liver disease. I think the right thing to do was not give him the Tylosin Tartrate anymore. I did some google search on side effects of tylosin tartrate for dogs. This is what I have found through these sites:
http://www.petmd.com/pet-medication/tylosin#.UrN5bPRDvmY
http://www.veterinarypartner.com/Content.plx?P=A&A=1329&S=0&EVetID=900000045
http://www.vetinfo.com/tylosin-tartrate-for-dogs.html#b
The most common side effects associated with Tylosin use are upset stomach, diarrhea and lack of appetite.
Lethargy and sleepiness have also been reported.
These side effects are usually temporary and mild and not a cause for concern.
The most common severe reaction in pets taking Tylosin is a possible allergic reaction. While most pets take the drug without any adverse effects whatsoever, some pets may be allergic to the ingredients in Tylosin.
Be mindful of your pet, especially when he first begins a Tylosin regimen. Note any unusual behavior and report it to your veterinarian immediately.
Side effects and drug reactions are very rare with the use of Tylosin.
Tylosin may result in these side effects:
Pain and local reactions at injection site
Anorexia
Diarrhea
Tylosin Tartrate Side Effects
Tylosin tartrate provides a long list of potential side effects when used in feline and other types of veterinary medicine, but dogs prove to generally be very resistant to any adverse effects when taking this drug. Generally speaking, mild side effects may include vomiting or diarrhea, lethargy, reaction to the foul taste of the medicine and similar effects.
In certain cases, tylosin tartrate may affect the levels of certain important liver hormones and enzymes, so it's vital that you and your vet monitor your pet for any signs of potential disturbances to this balance. A set of basic blood tests done periodically is wise for any animal that takes tylosin tartrate, particularly for longer than a short period of time.
Side Effects
While there is definite side effect potential in large animal species, dogs in particular 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; that is usually done by a compounding pharmacy.
Tylosin may falsely elevate certain liver blood tests (ALT and AST).
Ever since I gave my dog Tylosin Tartrate, he has been acting differently. Should I go to a different vet and see what they do? The first vet, didn't specifically say he was acting like this because of the Tylosin. Maybe if I go to a new vet, they might give me a different type of medicine? I just want a different opinion.
I haven't seen it mentioned here, but it may have been...have you done a search?
From what I see on: http://www.tylosin.com/ it seems to be a medication for animals.