Patent ID: 7761147

Claim:
A process for transdermally delivering a drug to or sampling a body analyte from a patient by electrotransport from an electrotransport device comprised of an anode, a cathode and a source of electrical power electrically connected to said anode and said cathode, at least one of said anode and said cathode including an electrode and a reservoir comprised of a housing, said housing comprised of a polymeric material and an aqueous medium in contact with said housing, said aqueous medium comprised of (i) a drug or an electrolyte salt, (ii) propylene glycol, and iii) an antimicrobial agent in an amount sufficient to inhibit microbial growth in said aqueous medium, wherein said propylene glycol is present in an amount that renders said antimicrobial agent compatible with said device, said process comprising: providing electric current from said source of electrical power so that said drug is transdermally delivered to or said body analyte sampled from said patient by electrotransport from or to one of said reservoirs.