You can use whatever is available in your area, but do NOT use anything as an injectable because the milk withdrawal when a dewormer is injected is too long to be practical in milkers. It's several months if you inject Cydectin (moxidectin) but only a couple of weeks if it's taken orally. Most drugs are only a week or two if given orally.
Here is the website where you can look up the milk withdrawal for drugs:
It appears to not be working correctly at this moment (which is why I can't look up the exact withdrawal time for the moxidectin) but it should be back up soon.
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You can use whatever is available in your area, but do NOT use anything as an injectable because the milk withdrawal when a dewormer is injected is too long to be practical in milkers. It's several months if you inject Cydectin (moxidectin) but only a couple of weeks if it's taken orally. Most drugs are only a week or two if given orally.
Here is the website where you can look up the milk withdrawal for drugs:
http://www.farad.org/wdilookup/
It appears to not be working correctly at this moment (which is why I can't look up the exact withdrawal time for the moxidectin) but it should be back up soon.