One should never use a prescription medication on someone (something) for which it does not have a medical doctors approval.
It is always wrong to assume a medication for a human can double for use on dogs
and other animals. Some are toxic. This noted, there are in fact cases of over-the-counter and home-remedies that humans use that can be used on a dog, but not until one knows it is in general done with good success. Don't be the test case.