The veterinarian should be informed. In treating more serious infections, cephalsporins are often used in combination with other antibiotics to cover a broader group of bacteria when a specific agent of infection is not known. This medication is commonly used for several months without monitoring tests of any kind. It is felt to be safe for long term use. The oral suspension is only good for a two week period.
Refrigeration is recommended.
Cephalexin does not cross into milk well and thus is probably not a concern in lactating females. It does, however, cross the placenta and is best not used in pregancy if it can be avoided. Should nausea result from administration, simply give the medication with food.