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Although Lomotil is sometimes used in dogs to treat diarrhea, for a dog his size his dose would only be about 1/5 of a tab, so it would be very difficult to split that small. In a dog that is vomiting that frequently, sometimes giving anything orally leads to further vomiting, so I would not recommend doing that unless you can get the OK from the veterinarian who examined him yesterday. In fact, he may do better with medications administered via injection versus orally. It is important to monitor his hydration status if the vomiting and/or diarrhea continues as well as one this little can easily become dehydrated. I would strongly recommend that you have him re-evaluated today by the on call vet and so that his treatment can be reviewed and perhaps altered.
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