Penicillin
Amoxicillin
Ampicillin
Cephalexin
Clindamycin
Ciprofloxacin
Sulfamethoxazole/Trimethoprim
http://www.drsfostersmith.com/
Also for ailing FISH:
Metronidazole
http://www.drsfostersmith.com/
Or for you BIRD lovers out there:
Doxycycline
http://www.drsfostersmith.com/
If you're afraid you may have gotten your PET medications mixed up, you can double check for yourself:
http://www.drugs.com/
Be an informed PET OWNER and always check the proper applications and contraindications of any and all medications before you use them.