Withdrawal Periods: Guide to using these tables
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Withdrawal Periods
Guide to using these tables
In the withdrawal period tables, where a product is indicated for use in a species, then the withdrawal period is given, otherwise the dash "-" is used. Traditionally, the word "nil" has been used where no withdrawal period is needed. Increasingly the phrase "zero hours" or "zero days" is being used: these should be treated as synonyms.
If a veterinary surgeon prescribes use of a product in a species for which it is not indicated (under the "cascade"), then the veterinary surgeon must set an appropriate withdrawal period, not less that the "standard" withdrawal periods, which are:
The information in these tables is the best information from the participating companies about their products. The marketing authorisation holder must always be the absolute reference point for any information on a specific product.
Specific Considerations for Milk
In general, milk should be excluded from the bulk sold if a cow is in poor health, especially if suffering from udder or reproductive tract disease, is being fed or treated with any substance known to make the milk unsuitable for human consumption, or has a very low yield (less than 2 litres per day).
Where available, milk withdrawal periods for sheep and goats are stated under ‘‘Notes’’ in the right-hand column of the table.
Where intramammaries are used outside the data sheet recommendations, e.g.
•the number of tubes is increased, or
•the treatment period is increased, or
•the interdose interval is shortened, or
•the treatment is changed to another product,
•or there is simultaneous administration of other antimicrobials by this or other routes
then the veterinary surgeon should set a withdrawal period not less than the standard 7 days for milk or 28 days for meat.
Dry Cow Preparations: milk withdrawal
Some dry cow treatments are given two withdrawal periods in the table
•the first, appearing in the ‘‘cattle milk’’ column, is the withdrawal in hours following a dry period which is at least as long as the Minimum Dry Period (MDP). If there are brackets around the figure, e.g. (36 hours), this indicates that it is less than for most contractual agreements.
•the second figure appearing in the ‘‘cattle milk’’ column is the MDP, that is, the minimum period between infusion of the product into the dry udder and the calving date.
If the cow calves before the expected date the total withdrawal period must therefore be extended to include the remaining part of the expected MDP plus the milk withdrawal from the time of the last treatment.
Where dry cow treatments are administered outside the data sheet recommendations, the absence of antimicrobials should be confirmed by carrying out appropriate testing before the milk is used for human consumption.
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