The risk of animal compounded drugs delivered by transdermal methods has been pointed out since at least 2004; The concept of transdermal delivery of a drug has appeal for use in animals that are difficult to medicate. The potential risk of secondary human exposure must be considered. Likewise, the physical and chemical properties of some drugs preclude transdermal delivery.

Compounding for Animal Patients: Contemporary Issues

Elaine Lust

J Am Pharm Assoc. 2004;44(3)