Ethics approval and consent to participate
Approval for the study was granted by University of Ilorin Teaching Hospital Ethics Research Committee (ERC/PAN/2018/08/1814) and the joint University of Ibadan/University College Hospital Health Research and Ethics Committee (UI/EC/15/0308). The study was registered on ClinicalTrials.gov (ID NCT03182972) on 09/06/2017.The study was explained to the pharmacists and the patients. Only those who gave informed consent were recruited for this study. The research was carried out in accordance with the Declaration of Helsinki.