Judith...
Here is a link to the Duplocillin website with the the "label".
http://www.intervet.ca/products/duplocillin__la/020_product_details.asp
According to this, it's only labelled for IM use...I know that probably doesn't answer your question.
Give your vet a call...he/she would be able to give better advice.
Good luck & cheers---
TTB :wink: