**5. Conclusions**

Electroactive drug-loaded polymeric films represent an effective means of controlling the delivery of various types of drugs, and the development of new on–off therapies from surface coatings with drug-loaded conducting polymers applied to implantable devices. Such coatings have prospects for positive economic and health impacts in the short–medium term (e.g., as coatings for neural electrodes) [35,36], and societal impacts in the long term (e.g., enhanced quality of life). Likewise, the development of biodegradable alternatives to PPY has prospects for health impacts in the long term (e.g., as drug-delivery devices and scaffolds for tissue engineering) [37].

**Author Contributions:** Conceptualization, J.G.H. and M.F. Methodology, M.F. and J.G.H. Formal analysis, M.F. and J.G.H. Investigation, S.A.A.S., M.F., S.R.B., N.R.H., S.J.B., and R.M.H. Data curation, M.F., N.R.H., S.J.B., and J.G.H. Writing—original draft preparation, M.F. and J.G.H. Writing—review and editing, all authors. Supervision, J.G.H. and B.M.Y. Project administration, J.G.H. Funding acquisition, J.G.H.

**Funding:** This research was funded by a variety of sources: a Higher Education Commission of Pakistan for an International Research Support Initiative Program (IRSIP) scholarship to support S.A.A.S. and B.M.Y., a Royal Society Newton International Fellowship to support M.F., a Lancaster University Faculty of Science and Technology Summer Internship to support S.R.B., a Lancaster University Faculty of Science and Technology Early Career Internal Grant to support R.M.H and J.G.H., and a Royal Society Research Grant (RG160449) and an EPSRC First Grant (EP/R003823/1) to support J.G.H.

**Acknowledgments:** We thank Naomi Stanhope for assistance with sample preparation.

**Conflicts of Interest:** The authors declare no conflict of interest. The sponsors had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript, and in the decision to publish the results.
