Current research has demonstrated that owner compliance is one of the larger problems that we see in veterinary medical care. There is concern that owners leaving the practice with a prescription may not have it filled and follow through with the patient's treatment. I have seen this personally when recommending an OTC medication or supplement for a patient. Leaving the office with a medication ensures that it is in hand, the first step toward owner compliance. It lessens the chance of delayed treatment caused by use of pharmacies that must send their products via mail,etc. That said, I verbally offer my clients the option of a pharmacy Rx, especially when I know it may be a very inexpensive drug at a human pharmacy. Over 90% of my clients prefer to leave the clinic with their medication in hand, for convenience, and confidence in knowing they have received the proper medication for their pet. I see no benefit in writing prescriptions for every medication dispensed as it will consume valuable time that might be better spent with patients.