Simultaneous spectrophotometric determination of recombined sofosbuvir, ledipasvir and paracetamol together as commonly repurposed drugs for COVID-19 treatment

Abstract Background COVID-19 has emerged as the most serious outbreak in recent years. Certain medications such as sofosbuvir (SOF), ledipasvir (LDV) and paracetamol (PAR) were proposed as a safer and recommended substance to control symptoms of COVID-19. Results Using built-in spectrophotometer software, zero order and derivative spectra of the studied components, two extremely clear, quick, and sensitive spectrophotometric techniques for simultaneous determinations of SOF, LDV, as well as PAR have been developed. LDV was calculated using a zero order absorption spectrum at wavelength maxima of 333 nm. SOF and PAR were evaluated simultaneously using a first derivative spectrophotometer at 247.2 nm and 260.8 nm, respectively. The calibration graphs for SOF, LDV, and PAR are linear over ranges of concentrations of 8–60 µg/mL, 4–22 µg/mL, and 2–14 µg/mL, consequently. The suggested methodologyspecificity was investigated using laboratory manufactured (different ratios) mixtures, which were then effectively used to the analysis of Mpiviropack plus® and Panadol® pills. Valid limitations included accuracy, precision, and specificity. The methodologies were validated in accordance with some ICH standards. Conclusions The methods proposed were simple, accurate, precise, and neither require any complex equipment nor specific software