Background: Poor pharmacokinetic profiles and resistance are the main two drawbacks from which currently used antiviral agents suffer, thus make them excellent targets for research, especially in the presence of viral pandemics such as HIV and hepatitis C. Methods: The strategies employed in the studies covered in this review were sorted by the type of drug synthesized into ester prodrugs, targeted delivery prodrugs, macromolecular prodrugs, other nucleoside conjugates, and non-nucleoside drugs. Results: Utilizing the ester prodrug approach a novel isopropyl ester prodrug was found to be potent HIV integrase inhibitor. Further, employing the targeted delivery prodrug zanamivir and valine ester prodrug was made and shown a sole delivery of zanamivir. Additionally, VivaGel, a dendrimer macromolecular prodrug, was found to be very efficient and is now undergoing clinical trials. Conclusions: Of all the strategies employed (ester, targeted delivery, macromolecular, protides and nucleoside analogues, and non-nucleoside analogues prodrugs), the most promising are nucleoside analogues and macromolecular prodrugs. The macromolecular prodrug VivaGel works by two mechanisms: envelope mediated and receptor mediated disruption. Nucleotide analogues have witnessed productive era in the recent past few years. The era of non-interferon based treatment of hepatitis (through direct inhibitors of NS5A) has dawned.

Background Disease activity is suggested to be an important indicator for quality of life (QoL) in patients with inflammatory bowel disease (IBD). Few studies of the association between adherence to medication and QoL in patients with IBD are available, and their findings are conflicting. We examined associations between disease activity, medication adherence, and QoL in patients with IBD in occupied Palestinian territory. Methods This correlation cross-sectional study was done from July 1, 2017, to Feb 30, 2018. We used convenience sampling to recruit patients from three major hospitals in southern and northern regions of occupied Palestinian territory. The disease-specific inflammatory bowel disease questionnaire (IBDQ) was used to examine QoL. Medication adherence was measured with the modified Morisky adherence scale. Associations were assessed by regression analysis. Results were analysed with SPSS version 20. The study was approved by the Al-Quds University Research Ethics Committee. Informed verbal consent was obtained from the participants before the start of the study.