Spectrofluorimetric determination of tianeptine using its quenching effect on Vilazodone

A rapid, cost effective, simple and reliable method was developed for the determination of Tianeptine (TIA) drug in bulk and in pharmaceutical formulation. The fluorescence of Vilazodone was measured in isopropanol at room temperature. The method was optimized by measuring the factors that may affect the fluorescence intensity such as: pH, diluting solvent, temperature and mixing time. The developed method was validated according to ICH guidelines in terms of accuracy, precision, linearity, range, LOD and LOQ. The concentration range was found to be linear in the range of 10-100 ng/ml. The LOD and LOQ values were found to be very small (1.86, 5.62 ng/mL. The % RSD and the % R were found within the acceptable range. Unlike the HPLC procedures, the proposed method for TIA determination has many advantages over the reported analytical methods represented in its rapidity, lower cost and environmental safety as the instrument is simple with low operating cost.

Prospective comparison of chilled versus room temperature saline irrigation in alcohol-assisted photorefractive keratectomy

INTRODUCTION

Chilled saline is commonly used to irrigate the ocular surface after photorefractive keratectomy (PRK) and is often considered by the patients to be uncomfortable. Room temperature (non-chilled) saline may be a safe and less painful alternative.

OBJECTIVES

To compare pain and visual outcomes after irrigating the ocular surface with chilled saline versus room temperature saline in alcohol assisted PRK.

MATERIALS AND METHODS

In this prospective, single-masked, randomized, contralateral eye study, myopic eyes were treated with PRK. Immediately after laser ablation one eye was irrigated with chilled saline and the other with non-chilled saline. Primary outcomes measured were pain, haze, uncorrected (UCVA) and best-corrected (BCVA) visual acuities, and manifest refraction.

RESULTS

Each group comprised of 40 eyes. There was no significant difference in pain between the groups at any point during five days after surgery. At 6 months the mean UCVA was -0.08 logMAR ± .077 [SD] (20/17) and -0.07 ± .074 logMAR (20/17) in the chilled and non-chilled groups respectively (p =.35). Both groups achieved 95% UCVA of 20/20 or better. The manifest refraction spherical equivalent (MRSE) was -0.05 ± 0.21 D and -0.025 ± 0.27 D respectively (p = .79). There were no lines lost of BCVA and no haze observed. Similar outcomes were observed with regard to pain and vision in both groups.

CONCLUSION

The use of room temperature saline irrigation during PRK appears to be safe and effective.