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use in lactating dairy cattle and some have milk withholding time warning
statements. The producer should be informed about the status of these
products and notified that they may cause a residue in milk. They should
not be used or stored on dairy farms.
If a drug bears a manufacturer's label that includes indications for use in
cattle or calves, and the product contains the following, it is an
unapproved, illegal sulfonamide or a withdrawn 510.450 sulfonamide drug.
sulfathiazole, sulfa urea,
sulfapyridine, sulfanilamide,
sulfamerazine, sulfamethoxazole,
sulfadiazine as a single ingredient or in combination with
sulfamethazine or other sulfonamides or other drugs such as
neomycin;
OR
if a product contains SMZ as a single ingredient without the state-
ments "Do not use in female dairy cattle 20 months of age or
older. Do not use in calves under one month of age or calves fed
an all milk diet,"
OR
if a product contains SMZ in combination with other sulfonamides
or drugs such as neomycin, with or without the "20 month"
warning statement the product is an unapproved, illegal
sulfonamide or a withdrawn 510.450 sulfonamide.
NOTE: Veterinarians often extra label FDA approved human prescription
sulfonamide drugs for oral use in calves. This is allowable under the
AMDUCA.
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