I have 500 mg capsules of cephelaxin that i got for a bigger dog. I have a smaller dog that needs it now, can i break the capsule and only give a partial dose? and, if so, how should I mix it and with what?
I wouldn't recommend this. Usually drugs that are dispensed in capsule form are done so usually because they don't taste good, dissolve well, or because their release in area where the gel capsule is dissolved is optimal for some reason. Because of this, the process you're considering could pose several problems for your pet. The first is that the medication could sufficiently alter the taste of the food to cause your pet to stop eating, not a good thing when your dog needs energy to fight on an infection. Second, the drug could be irritating to the lining of the mouth and esophagus, which also could complicate matters. Third is that it's difficult to get an accurate dosage and, lastly, mixing a drug evenly is difficult. There's nothing more frustrating than to mix a drug in, say, a tablespoon of tasty canned food, only to have the dog eat only some of it. Then on top of all the other problems associated with this, you have no idea how much medication the animal has received.
Also a note of caution here about leftover medication. Prescriptions with directions to give all of a medication should be followed even if the animal appears completely normal after only a few days. One reason why antibiotic-resistant bacteria have become such a problem is because people used antibiotics just long enough to knock out the most susceptable germs and eliminate signs of the problem. Unfortunately, those bacteria that survived did so because they were resistent to this shorter period of exposure to the drug. These then multiply and the next time a problem arises, the antibiotic that worked before no longer will. This explains why infections that used to respond very well to much less expensive antibiotics now require different, often more expensive ones.
If money is an issue and your veterinarian prescribed the drug to keep on hand for your bigger dog, see if you can trade some of it in for the right size for your smaller pet.
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