Can I request a prescription from my vet for a particular drug?
Legally only vets can actually decide which prescription-only medicines are to be used in any particular animal. If you find something which you believe would be beneficial, or cheaper than the drug your vet has prescribed, then most vets will happily consider such a request. They still have the final say. If your vet does not seem to be helpful about anything, you can seek a second opinion from another vet.