Holly Nash, DVM, MS Veterinary Services Department, Drs. Foster & Smith, Inc.
With a few exceptions as noted below, one should avoid using all medications in pregnant and lactating (nursing) dogs. There may be instances in which a medication not recommended for use during pregnancy may need to be used to save the life of the bitch, even though it may potentially harm the fetuses. Always consult with your veterinarian before administering any drug or supplement to a pregnant or nursing dog. NOTE: This is only a partial listing of drugs that should be avoided in pregnant or nursing dogs. A listing of all such drugs is beyond the scope of this article. If you have concerns regarding a specific drug, type it in the search box above.
Drug
May Be Used
Do Not Use
Safety Studies in Dogs Not Available; Consult Your Veterinarian
OK I was told by a friend recently that you should avoid Heartworm tablets (diethylcarbamazine citrate) in both males and females when planning to breed at least 6 weeks before mating. I give both my dogs heartworm medication which is recommended here every month. Does anyone know the reason why I was told to stop giving at least 2 months before breeding and not while the female maybe pregnant and only start again after the pups are 8 weeks. Interestingly I was told this maybe the reason my female does not conceive easily. Anyone's input would be appreciated. Thanks