Objectives: Pioglitazone hydrochloride is a thiazolidinedione antidiabetic agent; it decreases insulin resistance which leads to decreased hepatic glucose output. It has short half-life, and is extensively metabolized and requires one to two times daily dosing. Present study aims to prepare transdermal patches of Pioglitazone hydrochloride to avoid all these drawbacks associated with it. Methods: In present study, different transdermal patches of Pioglitazone hydrochloride were prepared using different polymers and evaluated on many parameters. Locally fabricated Franz diffusion cell was used for the in-vitro release study. Result revealed that there is a direct relationship with weight of the patch and drug content. Results: The thickness lies in the range of 0.027 to 0.038mm. Average thickness was almost uniform within same formulation, a small variation in thickness was observed with different formulations. The weight of patches lies in the range of 43.31 to 46.3 mg. The percentage of the drug content lies in the range of 96.87 to 99.28. Content uniformity studies proved that the amount of Pioglitazone hydrochloride in each patch of 2.009 cm2 was found to be fairly uniform. Percent moisture absorption was found to be in the range of 4.388 to 5.465, largest in formulations of batch code T3 and least in the batch code T2. Conclusion: The prepared transdermal drug delivery system of Pioglitazone hydrochloride using different polymers such as HPMC, EC, Chitosan and PVP had shown good promising results for all the evaluated parameters. However, for the in-vitro drug release and drug content result, formulation T4 was shown to be the optimized formulation, as higher percentage of drug release was obtained. Peer Review History: Article received on- 1 October; Revised on- 25 October; Accepted on- 1 November 2016, Available online 15 November 2016 Academic Editor: Dr. Amany Mohamed Alboghdadly, Princess Nourah bint abdulrahman university, Riyadh, amalbgadley@pnu.edu.sa UJPR follows the most transparent and toughest ‘Advanced OPEN peer review’ system. The identity of the authors and, reviewers will be known to each other. This transparent process will help to eradicate any possible malicious/purposeful interference by any person (publishing staff, reviewer, editor, author, etc) during peer review. As a result of this unique system, all reviewers will get their due recognition and respect, once their names are published in the papers. We expect that, by publishing peer review reports with published papers, will be helpful to many authors for drafting their article according to the specifications. Auhors will remove any error of their article and they will improve their article(s) according to the previous reports displayed with published article(s). The main purpose of it is ‘to improve the quality of a candidate manuscript’. Our reviewers check the ‘strength and weakness of a manuscript honestly’. There will increase in the perfection, and transparency. Received file: Reviewer's Comments: Average Peer review marks at initial stage: 5.0/10 Average Peer review marks at publication stage: 7.0/10 Reviewer(s) detail: Dr. Maha Khalifa Ahmed Khalifa, Al-Azhar Universit - Cairo, Egypt, mahakhalifa.ahmed@hotmail.com Dr. Viney Chawla, University Institute of Pharmaceutical Sciences, Baba Farid University of Health Sciences, Sadiq Road, Faridkot-Punjab 151203, drvineychawla@gmail.com Similar Articles: DEVELOPMENT AND IN-VITRO EVALUATION OF MATRIX-TYPE TRANSDERMAL PATCHES OF LOSARTAN POTASSIUM