Background and Objective: This study was designed to identify the changing trends in Antipsychotic prescription pattern in Pakistan. It was part of the research project Research on East Asian Psychotropic Prescription Pattern (REAP) carried out to identify the prescription patterns of schizophrenic patients in different countries located in Asia. Our objective was to assess the trend and change of psychotropic drug prescriptions for patients with schizophrenia. Methods: The design of the study was quantitative and of descriptive epidemiology. This study was carried out from 30th March 2017. Data was collected on a unified protocol by the Psychiatrists from Pakistan. Three (3) centers i.e., Lahore, Karachi and Islamabad provided the data. Indoor and outdoor cases with Schizophrenia were recruited. A web based recording system for collection of data done at Taipei Taiwan, and statistical analysis was performed and transferred to all participating centers including Pakistan. Results: The main findings of the study were that majority of the patients were prescribed antipsychotic poly pharmacy drug. It was also found that Anxiolytics, anti-depressants and Antiparkinsonian drugs were also co-prescribed. Conclusion: It was concluded that antipsychotic poly pharmacy along with Anxiolytics, anti-depressants and Anti-parkinsonian drugs were prescribed to patients with schizophrenia in Pakistan. doi: https://doi.org/10.12669/pjms.35.3.136 How to cite this:Malik M, Ghani MU, Mazhar W, Munir N. Changing trends in anti-psychotic prescription pattern in Pakistan. Pak J Med Sci. 2019;35(3):---------. doi: https://doi.org/10.12669/pjms.35.3.136 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Objective: To explore the prokinetic effect of Ranitidine, to compare it with the prokinetic effect of Neostigmineand to observe the potentiating prokinetic effect of Ranitidine and Neostigmine in combination. Study Design: Randomised controlled trial (experimental study). Place and Duration of Study: Multi disciplinary centre, Army Medical College, Rawalpindi, from Jan to Dec 2015. Methodology: Experiments were performed on three groups of rabbits (n=6) and Cumulative dose responsecurves were plotted using isolated duodenal tissue on power lab (USA). In the first two groups of experiments,cumulative concentrations of Neostigmine and Ranitidine were studied separately with neostigmine acting as acontrol and in the third group the potentiating effect of a fixed dose of ranitidine on neostigmine was evaluated. Results: Neostigmine’s response was taken as 100 percent and Ranitidine’s response when compared to it came out to be 197 percent. The dose response curve of Neostigmine was shifted to the left and upwards in the presence of Ranitidine. The percent response with Neostigmine alone was taken as 100 percent and increased to 212 percent when the tissue was pre-treated with Ranitidine. Conclusion: Our study has indicated that Ranitidine has marked prokinetic effect which is found to be greaterthan Neostigmine. It is also inferred that Ranitidine can potentiate the prokinetic effect of Neostigmine.